An experiment involves one independent variable and one dependent variable.
The dependent variable changes in response to the independent variable. An independent variable is a variable that is controlled or manipulated in the experiment. In the given options, the dependent variable in the experiment is the amount of duckweed. In an experiment, the dependent variable is the variable that is measured to determine the effect of the independent variable. Therefore, in this experiment, the amount of duckweed would be measured to determine how different water pH levels impact its growth.
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In squirrels, grey is dominant and brown is recessive. A homozygous recessive female is crossed with a heterozygous male. Deduce how many of their offspring will be brown.
A homozygous recessive female is crossed with a heterozygous male. 25% of their offspring will be brown.
What do you mean homozygous recessive?An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb. Finally, the genotype of an organism with two recessive alleles is called homozygous recessive.
In a heterozygous genotype, the dominant allele overrules the recessive one. Therefore, the dominant trait will be expressed. The recessive trait won't show, but you're still a carrier.
Cystic fibrosis is one example of a homozygous recessive disease. The broken gene is involved in transporting chloride, something all cells need to do.
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Does natural selection increase adaptation?
Natural selection leads to adaptation, that is, to a population dominated by organisms that are anatomically, behaviorally, and physiologically well suited to survive and reproduce in a specific environment.
How do I make this into a summary ?
Palaeontologists are scientists who study the fossilized remains of plants and animals that lived long ago.
The study of fossils:
Palaeontologists have discovered fossil remains of cetaceans with skulls different from modern whales, as well as a more ancient cetacean with hind legs and a pelvis. Although the pelvis wasn't fused to the backbone and the cetacean was able to swim, its ankle bones were unique to the order of biogeography animals like bison, pigs, hippos, and deer. This indicates that evolutionary change is driven in part by geographical change, as these animals tend to be found in the same regions.
What are Fossils?
Fossils basically are the remains or traces of animals, plants, and other organisms that lived in the distant past. They can come in the form of bones, teeth, shells, footprints, or even impressions in sediment. Fossils provide valuable evidence about the history of life on Earth.
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1. Why do some genetic mutations lead to completely nonfunctional proteins while others do not affect the functioning of the resulting protein at all?
The type of genetic mutation is responsible for the nonfunctional or functioning of the respective proteins. Most nonsense mutations result in nonfunctional proteins.
What is a genetic mutation?A genetic mutation may be defined as the process of an alteration in the nucleic acid sequence of the genome of an organism, virus, or extrachromosomal DNA. It can result from DNA copying mistakes made during cell division, exposure to ionizing agents like UV radiations, etc.
Nonsense mutations occur when a premature nonsense or stop codon is introduced in the DNA sequence. When the mutated sequence is translated into a protein, the resulting protein is incomplete and shorter than normal.
Gene variants prevent one or more proteins from working properly. By changing a gene's instructions for making a protein, a variant can cause a protein to malfunction or not be produced at all.
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Which statement is true about fossils?
O Most life on earth has been preserved as fossils.
O The conditions for forming fossils are rare.
O Any organism can be preserved as a fossil no matter its form.
O The fossil record provides a thorough and complete view of Earth's history.
Answer: I believe The conditions for forming fossils are rare.
Explanation: hope this helps
Besides forming canyons how else do you think moving water can shape the earth? Come up with at least two additional examples
Besides forming canyons, moving water can shape the earth by leading to erosion and weathering of rock particles.
What is Weathering?This is referred to as the breaking down or dissolving of rocks and minerals on Earths surface through various agents such as wind , water etc. Erosion on the other hand is the process in which earthen materials are worn away and transported by natural forces such as water etc.
The moving water also causes erosion, which occurs when pieces of earth that have been weathered and worn away are moved to another place and is the reason why they were chosen as the correct choices.
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About how often is a full moon observed from the Earths surface?A. Every two weeksB. Once each leap yearC. Once a monthD. Each a week
The pattern of lunar stages endures near a month, at 29.5 days, a period known as the synodic month. In this manner, the full moon happens ordinarily once each scheduled month, be that as it may, when the full moon occurs inside the initial two days of an allowed month.
Indeed. The Moon requires around one month to circle Earth (27.3 days to finish a transformation, however, 29.5 days to change from New Moon to New Moon). As the Moon finishes each 27.3-day circle around Earth, both Earth and the Moon are moving around the Sun.
This is viewed as the underlying or the principal day of the moon's stage. Following fifteen days or so we see the whole moon and consequently, we call it a full moon day. As we currently realize that the moon goes in a circle at a uniform speed we can presume that following fifteen days from the full moon day we will again have the new moon day.
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Which statement accurately identifies the order of tissues pictured from left to right in the microscopic image?
Epithelial cells, smooth muscle, connective tissues
Epithelial cells, connective tissues, smooth muscle
Connective tissues, smooth muscle, elastic fibers
Connective tissues, elastin fibers, smooth muscle
The statement that accurately identifies the order of tissues pictured from left to right in the microscopic image is Connective tissues, smooth muscle, elastic fibers.
Option D is correct.
What are connective tissues?Connective tissues are described as tissues that supports, protects, and gives structure to other tissues and organs in the body.
Connective tissue also known to stores fat, they also helps move nutrients and other substances between tissues and organs, and helps repair damaged tissue.
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Which activity is more likely to be the work of a research scientist rather than an engineer?
A. Developing safer space suits to protect astronauts
B. Creating materials to absorb thermal energy from fires
C. Finding ways to use a 3D printer to make food packaging
D. Using tools to measure radiation levels in space
Answer:
D. Using tools to measure radiation levels in space
Explanation:
You want to identify the activity that is more likely to be the work of a research scientist rather than an engineer.
EngineeringThe task of an engineer is to apply the laws of physics and the properties of materials to the creation of useful artifacts. Such artifacts may include space suits, fireproof materials, or food packaging.
ResearchThe task of a research scientist is to observe the world and the interaction of its parts. The purpose is to come to an understanding that allows prediction of future behavior.
Of the choices offered, the most likely task of a research scientist is ...
using tools to measure radiation levels in space.
Which type of plasma membrane transport is used for gas exchange?
Since simple diffusion is responsible for the actual gas exchange, oxygen and carbon dioxide can pass across membranes without the use of energy.
Gas exchange utilises what type of cell transport process?Diffusion has a major role in gas exchange during breathing. A concentration gradient drives the transport mechanism of diffusion. The concentration of gas molecules shifts from one area to another.
What type of membrane transport mechanism does the gas use to pass the membrane?diffusive facilitation Others require assistance to pass the plasma membrane's hydrophobic core, unlike some molecules, like as carbon dioxide and oxygen, which can diffuse through it on their own. When a diffusion process is assisted, membrane proteins help molecules move across the plasma membrane.
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Type the correct answer in the box. Spell the word correctly.
Read about the biotechnology R&D career described and fill in the blank.
Anastasia works in a laboratory at a large research hospital. The organisms she studies are too tiny to be seen without a microscope. Anastasia is a
Answer: microbiologist
Explanation:
A set of biology exam scores are normally distributed with a mean of 606060 points and a standard deviation of 666 points. Antoaneta got a score of 515151 points on the exam. What proportion of exam scores are higher than antoaneta's score? you may round your answer to four decimal places.
The proportion of test scores that are higher than Antoaneta score is 0.9332.
Antoaneta scored 51 points on the test with a normal average of 60 points.
Antoaneta's score is 51 − 60 = − 9 relative to the average.
Standard deviations are relative to the mean: -9/6 = -1.5
This is Antoaneta's z-score.
To find the value of the proportion of exams above the Z-score of −1.5, look at the Z-table.
Z-score −1.5 = 0.0668, the test score is below Antoaneta's score
0.0668, the test score is below Antoaneta's score
If 0.0668 the test score is below the Antoaneta score
→ 1 - 0.668 = 0.9332
Test score 0.9332, meaning that the score is 9.3% higher than Antoaneta’s.
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Why is mitosis crucial life?
Mitosis is crucial for life as it replaces the worn out cells in the body and provides new cells for growth.
Mitosis is basically a kind of cell division which involves one cell, the mother cell, divides in order to produce two new cells which are known as the daughters cells which are genetically identical to itself. When we look at the cell cycle, mitosis is the part of the process of division in which the DNA present in the cell's nucleus is split to form two equal sets of chromosomes.
Since mitosis allows the DNA to split into two equal sets, it helps in ensuring equal division of chromosomes during the formation of daughter cells. The cells in the body get worn out and are replaced by the help of mitosis division. Mitosis results in the formation of two new daughter cells and hence provides new cells for growth.
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Please Help! I Have Limited Time!
Maya wrote a few steps to describe how carbon circulates between the atmosphere and living organisms. Step 4 is missing.
Step 1: Carbon enters the atmosphere as carbon dioxide from respiration and combustion
Step 2: Plants use carbon dioxide to make glucose
Step 3: Plant-eating animals consume the glucose present in plants
Step 4:
Which of the following best describes step 4?
A. Carbon dioxide in the atmosphere is used by plants for photosynthesis.
B. Carbon dioxide in the atmosphere is converted into glucose by animals.
C. Dead animals decompose and recycle the carbon in the form of oxygen and water.
D. Dead animals are buried and form fossil fuels, which produce carbon dioxide when burned.
Complete the following sentence.
Farmers are protected from legal suits aimed at limiting their farming practices by various Right to
United States.
laws in all the states of the
Right to farm laws in the United States deny nuisance lawsuits against farmers who use accepted and standard farming practices and have been in prior operation even if these practices harm or bother adjacent property owners or the general public.
Right-to-farm laws
The United States' right to farm rules forbid nuisance lawsuits against farmers who follow established farming practices, even if they cause harm or annoyance to nearby property owners or the general public.
Noise, scents, visual clutter, and hazardous constructions can all be agricultural annoyances.
All 50 states have a Right to Farm law in some form.
Many of these laws were created after 1980 as a result of the decline in farmland availability and challenges posed by private and public nuisance actions that make farming less likely.
The rules are intended to lessen the threat that nuisance lawsuits and burdensome state and local government regulation pose to common farming operations.
Unlike traditional agricultural preservation measures, which are intended to protect farmland itself,
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Identify the key structural features of a DNA molecule
a. DNA strands are antiparallel and include a 5'end and a 3'end.
b. Strong ionic bonds and hydrophobic interaction hold DNA together.
c. DNA contains the nucleotide bases adenine, thymine, guanine, cytosine, and uracil.
d. DNA is most often found as a left-handed helix, commonly referred to as Z-DNA.
e. The backbone of DNA is made of a sugar and a phosphate molecule.
f. DNA bases are always paired purine with pyrimidine.
Answer:
the backbone of a DNA is made of a sugar and a phosphate molecule
Which type of rna is transcribed from dna to carry a message?
An RNA type known as messenger RNA is translated from DNA to transmit a message. Single-stranded RNAs of the kind known as messenger RNA, or mRNA, are used to make proteins.
mRNA is created during transcription from a DNA template. RNA polymerase creates RNA from DNA that is functional for either messenger RNA (mRNA), which codes for proteins, or non-coding DNA (RNA genes). mRNA is produced during transcription, when the gene is transformed into main transcript mRNA by the enzyme RNA polymerase (also known as pre-mRNA). Introns, which are sections that won't ultimately code for the final amino acid sequence, are often still present in this pre-mRNA. These are eliminated during RNA splicing, leaving just exons, which are the areas that will actually encode the protein.
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Which of the following answer choices does not include an application of biotechnology?
GMOs
Gel electrophoresis
Crossing over
Transgenic organisms
Hence the correct answer is Transgenic organisms.
What are the 4 applications of biotechnology?Therapeutics, diagnostics, GM food, processed food, bioremediation, waste treatment, and energy production are only a few examples of the applications of biotechnology. We can now battle hunger and disease, produce more safely, cleanly, and efficiently, minimise our ecological imprint, and save energy thanks to the five branches of modern biotechnology: human, environmental, industrial, animal, and plant. When developing or producing various products, biotechnology makes use of biological systems, living organisms, or components of these. Examples of procedures that fall under the definition of biotechnology include brewing and baking bread (yeast is a live creature that can be used to produce the desired result).To learn more about biotechnology refer to:
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Across
1. A volcano surrounded by tall,
cone-shaped mountain made out of
lava, ash, and pyroclasic rock.
3. Piles of hardened lava
surrounding an underwater volcanic
eruption.
5. Large boulder like chunks of
cooled lava that is shot up in the air
during an eruption.
8. A pit in the ground left by a
collapsed volcano.
9. Small pieces of lava.
12. Pools of water warmed by hot
rocks beneath ground.
14. Rock formed from materials
deposited at the bottom of a body of
water.
17. Glassy strains of harden
volcanic material.
18. The independently moving pieces
of the Earth's crust.
19. Fields of hardened lava in
smooth, rope like strands.
20. A volcano surrounded by gently
sloping hills in a circular or
fan-shaped pattern.
Down
2. A volcano surrounded by a small
Icone of volcanic rock.
4. Magma that has risen to the
surface of the Earth.
Composite volcanoes have steep sides, are towering, and may reach heights of up to 10,000 feet. They are constructed from alternating layers of cinders, volcanic ash, and lava flows.
What kind of volcano is a composite volcano?Large volcanoes (tens of thousands of feet or meters tall) that are made up mostly of lava flows, pyroclastic deposits, mudflow (lahar) deposits, and lava domes are known as composite cones. Composite volcanoes frequently erupt during extended epochs (tens to hundreds of thousands of years).
What features distinguish a composite volcano?Composite volcanoes have steep sides, are towering, and may reach heights of up to 10,000 feet. They are constructed from alternating layers of cinders, volcanic ash, and lava flows. the Japanese volcano Mount Fuji, the Californian Mount Shasta, and the American Mount
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During meiosis I, assuming no crossing over, what chromatid combination(s) will be present at the completion of prophase I? Draw all possible alignments of chromatids as migration begins during early anaphase.
This is the sole time the cell has to transport DNA segments between the homologous pair since prophase I is the only time when the complex that momentarily forms between homologous chromosomes is present.
Which stage of meiosis I is the crossing over phase?In meiosis I, crossing over takes place during prophase I. It entails the exchange of genes across homologous non-sister chromatids, enabling the admixture of new, recombinant chromosomes with both mother and paternal genetic material.
In meiosis, how many chromatids and chromosomes are present?Each daughter cell will contain 23 chromosomes, or half of the original 46 chromosomes. There are two sister chromatids on each chromosome. The daughter cells now enter meiosis II, the third and last stage of meiosis. Following meiosis..
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which part of the eye changes how much light enters the eye?
Answer:
The iris
Explanation:
Hope it was helpful:)
Unit 10: Career Exploration
This activity will help you meet these educational goals:
● Content Knowledge—You will learn about the responsibilities of different types of
Biologists.
● Inquiry—You will conduct online research in which you will collect information, make
observations, and communicate your results in written form.
● 21st Century Skills—You will employ online tools for research and analysis, use critical
thinking, and communicate effectively.
Introduction
Biologists have different responsibilities based on their career choice or specialty. You have to
understand the opportunities available to you should pursue a career in this field.
__________________________________________________________________________
Directions
Task 1: Biologist Responsibilities
Research one or more of the following biology-related job fields: Field Biologist, Senior Biologist,
Conservation Biologist, Conservation Scientist, or Evolutionary Ecologist. Find a sample resume
within that field and identify some key skill sets that resume has. Are these skills that you feel you
already possess? Or would you need to grow some of these skills? Be sure to upload the sample
resume to the dropbox.
Type your response here:
There are many different job paths you might choose with this degree, but biology is a prerequisite for careers in the science and health sectors.
What is career in Biology?Relevant experience demonstrates your dedication to the field and helps you gain practical skills in a competitive employment market. It also gives you the chance to network with other professionals.
Profession experience might provide you a helpful understanding of the work if you're undecided of the area of biology you want to pursue.
You can qualify for a scholarship or bursary to help pay for your year-long industrial placement if your biology degree program includes one.
Therefore, There are many different job paths you might choose with this degree, but biology is a prerequisite for careers in the science and health sectors.
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List 6 examples of waves that occur in everyday life.
Answer:
6 examoles that waves accur everyday life…
Sound WavesStadium WavesSpring WavesWater WavesSeismic WavesJump rope wavesThese are 6 examoles that waves accur in everyday life
Biologists estimate that a randomly selected baby elk has a 44% probability of surviving to adulthood. Assume this estimate is correct. Suppose researchers choose 7 baby elk at random to monitor. Let x = the number that survive to adulthood. Find the probability that exactly 4 of the baby elk survive to adulthood. Round your answer to 4 decimal places. Leave your answer in decimal form.
Answer:
0.2304
Explanation:
You want the probability that exactly 4 of 7 randomly selected baby elk survive to adulthood, given that the probability of any individual surviving to adulthood is 44%.
Binomial PDFThe probability that exactly 4 reach adulthood is ...
7C4·(0.44^4)·(1 -0.44)^(7-4) ≈ 0.2304
The probability that exactly 4 of 7 baby elk survive to adulthood is about 0.2304.
What is the social science that studies society and social behavior?
The social science that studies society and social behavior is called sociology.
Sociology is defined as the scientific study of human social behavior, its relationships, and its institutions. This social science covers a wide range of topics, which includes social organization, social stratification, social interaction, social change, and collective behavior.
Sociologists, people who study sociology, use various ways or methods to study society, including quantitative and qualitative research, and use theories and concepts to understand and interpret social phenomena. It also, often uses other disciplines such as anthropology, economics, political science, psychology and history to understand the complexity of social phenomena.
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Answer: The social science that studies society and social behavior is called sociology.Sociology is defined as the scientific study of human social behavior, its relationships, and its institutions. This social science covers a wide range of topics, which includes social organization, social stratification, social interaction, social change, and collective behavior.Sociologists, people who study sociology, use various ways or methods to study society, including quantitative and qualitative research, and use theories and concepts to understand and interpret social phenomena. It also, often uses other disciplines such as anthropology, economics, political science, psychology and history to understand the complexity of social phenomena.
Explanation:
Which of the following is the best description of cell division that takes place through the process of meiosis
A. Embryo is growing and developing in the womb
B. A sperm cell and egg cell combine, forming a zygote
C. Humans begin producing sperm
D. Skin cells are constantly being replaced as old ones shed away every day
The best description of cell division that takes place through the process of meiosis is when the humans begin to produce sperms. Thus, the correct option is C.
What is Meiosis?Meiosis is a type of cell division. It is also called as reductional division. Meiosis occurs in the sex cells. These result into production of gametes in the organisms which reproduce through sexual mode of reproduction.
Meiosis is divided into two divisions which are Meiosis I and Meiosis II. These results into four daughter cells which contain haploid or half set of chromosomes in comparison to the parent cells. The gametes produced from meiosis undergo fusion to produce diploid zygote (2n).
Therefore, the correct option is C.
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mention for comparisons among taxis,nastism and tropic
Tropism is the term used to describe the directional movement of plants, whereas taxis is used to describe the directional movements of animals in reaction to a stimulus.
What exactly is nastism?Nastisms, also known as nastic motions, are typically found in plants and are non-directional reactions to stimuli (such as temperature, humidity, and light irradiance). Movement in plants can be caused by changes in turgor or growth, hence K+ ion concentration often regulates such movement in plants.
What distinctions exist between tropism and taxis?Tropism is defined as the directional movement of plants, whereas taxis is defined as the directional movement of animals in response to a stimulus. The most prevalent taxi types are chemotaxis and phototaxis, which react to light (in response to chemicals).
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What are 4 specialty areas within the field of biomedical engineering?
There are four areas of specialty within the field of biomedical engineering namely biomechanics, systems physiology, bioinstrumentation and rehabilitation engineering.
Biomedical engineering which is also known as the medical engineering basically involves the application of engineering principles as well as the design concepts in the field of healthcare. There are four major areas of specialty in the field of biomedical engineering which are biomechanics, systems physiology, bioinstrumentation and rehabilitation engineering.
Biomechanics involves application of mechanics to biological or medical problems. Systems physiology involves the use of engineering strategies to gain an integrated understanding of the functioning in living organisms. Bioinstrumentation involves application of measurement and electronics principles to develop devices that can be used in diagnosis and treatment of disease. Rehabilitation engineering focuses on improving the quality of life for individuals which have physical impairments.
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how is selective breeding important in agriculture? please help me!
Answer: important by bringing and growing crops that yield more, stand better, or resist pests and disease more effectively
Explanation:
Answer: Look below
Explanation: Selective breeding is important because it lets the population of that organism have a variety of offspring, increasing chances of surviving. When a person uses selective breeding, it leads them to have the ability to thrive in a sustainable production system. I hope this helped!
Which kind of erosion moves dissolved salt from place to place?
A. Chemical
B. Gravity
C. Sheet
D. Wind
Answer:
A. Chemical
Explanation:
Answer: I think the answer is A
Explanation: pls forgive me if I am wrong ty
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