Answer:
Most genes must be turned off because cells play specific functions, thereby only a limited number of genes must be expressed in each cell type in order to produce proteins required in the cell
Explanation:
Gener regulation is a critical molecular mechanism required for normal cell functioning. In consequence, genes are turned on and off depending on the cell type. For example, in the brain, cells that will be differentiated into neurons will be expressed, while genes involved in the differentiation of undifferentiated myoblasts into muscle cells will be turned off. Thus, genes are switched off in order to produce only those specific proteins which are required for each cell during specific developmental programs and functions carried out by each cell type.
Please help me asapppp anyone I will give brainliest
Answer: 1 = B, 2 = C, 3 = A
Explanation:
Need help with this one
Answer:
Hey sorry but I also need this answer
Explanation:
please let me know if you get it !
Blood pressure would be highest in the vessel labelled:
3
4
2
1
Answer:2 its 2
Explanation:
Whích scenario describes a relationship of parasitism?
O A polar bear catches a seal for dinner.
O Birds feed off the insects that are stirred up from the grasses as cattle move through.
O A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.
O Oxpecker birds eat parasitic ticks off the backs of zebras.
Answer:
C
Explanation:
C is the only one with something that is harming the animal but benefiting the parasite. A also seems like that, but it isn't parasitism.
Answer:
A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.
Explanation:
I took the test
Assume coat color in horses is controlled by a single gene. Palomino horses have a golden yellow coat, chestnut horses have a brown coat, and cremello horses have a coat that is almost white. A series of crosses between the three different types of horses produced the following offspring:
Cross Offspring palomino times
palomino x palomino 13 palomino, 6 chestnut, 5 cremello
chestnut x chestnut 16 chestnut
cremello x cremello 13 cremello
palomino x chestnut 8 palomino, 9 chestnut
palomino x cremello 11 palomino, 11 cremello
chestnut x cremello 23 palomino
A. Explain the inheritance of the palomino, chestnut, and cremello phenotypes in horses.
B. Assign symbols for the alleles that determine these phenotypes, and list the genotypes of all parents and offspring given in the preceding table.
Answer and Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached file.
A model of a plant cell is shown.
Which of the structures are present in plant cells, but not in animal cells? Select all that apply.
The question is incomplete, however, the missing part of the question is as follows:
nucleus, chloroplast, Golgi apparatus, cell wall
Answer:
The correct answer is - cell wall and chloroplast.
Explanation:
Plant cells and animal cells both are eukaryotic cells and most of the cellular structures are the same, however, the plant cells have few adaptions that make them different from animal cells.
Plant cells have a cell wall outside of their plasma membrane that provides support and protects the cell from injuries. Cell wall not present in an animal cell. The other structure that presents in plant cells and not in animals is chloroplast that helps plants to produce their food by the process of photosynthesis.
he reflexes from sense organs in the head are co-ordinated by the brain.
Name a sense organ involved in a reflex co-ordinated by the spinal cord.
Answer:
sense of touch
Explanation:
There are five sense organs that involved vision, hearing, taste, smelling, and touch.
Sense of touch is involved in a reflex coordinated by the spinal cord as when we touch something, sensory nerves sends the information to the brain and spinal cord. the motor nerves process the signals in the brain and send it back to the muscles, that leads to contraction reflexively.
Hence, the correct answer is "sense of touch".
Why would global warming have an effect on sea levels?
Answer:
ice caps melting would cause more water leading to higher sea levels
(For Science)
You arrive at the beach at 9:00 A.M. You lay a towel on the sand, and then you run 30 steps to reach the water’s edge. By 3:00 P.M., the water has almost reached your towel. What do you think happened?
halp
Answer:
The tide came in
Explanation:
Hope this helps!
Aaminah saw a sparrow eating a caterpillar. She also noticed that the mango tree in her garden was covered in caterpillars. A food chain linking these organisms is: *
choose one of these
Caterpillars -> Mango tree -> Sparrow
Mango tree -> Caterpillar -> Sparrow
Mango tree -> Sparrow -> Caterpillar
Sparrow -> Caterpillar -> Mango tree
Mango tree > Caterpillar > Sparrow
The first level in a food chain should be a primary producer which is the mango tree.
The second level in a food chain should be Primary consumer which is the caterpillar.
The third level in a food chain should be the secondary consumer which is the sparrow.
A food chain always starts from left to right. This from the primary producer then to the other levels. np
What landforms can be found under the ocean?
Indicate the expected number of Barr bodies in interphase cells of individuals with Klinefelter syndrome; Turner syndrome; and karyotypes 47,XYY, 47,XXX, and 48,XXXX.
Answer:
Barr bodies are small bodies that are dark staining bodies that show the inactivated X chromosome, these sex chromatin bodies attach to the membrane of the nucleus of interphase cells.
One less of the total number of X-chromosome (n-1) represents the number of Barr bodies.
Then,
The number of Barr bodies with Klinefelter would be:
Klinefelter (47,XXY): (n-1) = (2-1) = 1 Barr body as here two X chromosome present.
Similarly, for
Turner (45,XO): (n-1) = (1-1) = 0 Barr bodies (X chromosome = 1)
Now, as per the question, the bar bodies for karyotypes given
47,XYY: (n-1) = (1-1) = 0 Barr bodies
47,XXX: (n-1) = (3-1) = 2 Barr bodies
48,XXXX: (n-1) = (4-1) = 3 Barr bodies
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A scientist examines the legs of two different species. Due to similarities in the bone arrangement, the scientist concludes that the
leg structures of the two species are homologous.
What can the scientist conclude about these species?
ОА.
The two species evolved from a common ancestor.
OB
The two species are evolutionarily unrelated.
O C.
The two species have identical DNA.
O D.
The two species are found in the same ecosystem.
Answer:
A this is the definition of homologous
D would analogous
Explanation:
which piece of equipment will be the best for measuring 75 mL of liquid?
A.) 250 mL Breaker
B.) 100 mL Graduated Cylinder
C.) 400 mL Overflow cup
Answer:
The correct answer is 25 mL graduated cylinder (it should be used in all the cases)
Explanation:
Hope this helps
From,
1kvibing
The BEST piece of equipment for measuring 75 mL of liquid will be a 100 mL Graduated Cylinder (Option B).
In a laboratory, beakers, flasks, and graduated cylinders are instruments that can contain a liquid.From the options above, a 100 mL Graduated Cylinder is the most similar amount of liquid and therefore it will have the most accurate measure.In conclusion, the BEST piece of equipment for measuring 75 mL of liquid will be a 100 mL Graduated Cylinder (Option B).
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Cellular respiration extracts energy from what ?
Answer:
ATP, from glucose.
Glucose is from the food we eat.
All living organisms have complex organization, they are able to grow and develop, they are able to reproduce and pass on genetic information to their offspring, they are able to acquire and release energy, and they are able to maintain stable internal environments.
Which of the following statements can be inferred from the above information?
A. Living organisms share certain characteristics.
B. Nonliving organisms cannot possess any of the above characteristics.
C. Living organisms only need to possess one of the above characteristics.
D. Nonliving organisms are similar to living organisms.
Answer:
Option B. is the best answer. Nonliving organisms cannot possess any of the stated characteristics.
In an attempt to increase diversity in your local public health department workforce you decide to obtain more information from candidates than merely their skills and experience. Which of the following questions can you legally ask in a face-to-face job interview when the information is not provided on the application?A. In country where you were born?B. How many children do you have?C. What is your ethnic background?D. Have you worked with minority populations?
Answer:
C
Explanation:
Diversity is based on the practice and experience you have with a variety of different ethnic backgrounds
Question 6 of 20:
Select the best answer for the question.
6. Which of the following is a benefit of intensive farming?
O A. Animals raised in intensive farms are healthier.
O B. There are nearly one million types of intensive farms in the US.
O C. A concentrated animal feeding operation is the smallest type of intensive farm.
O D. The food produced on intensive farms is cheaper than that on open ranges.
O Mark for review (Will be highlighted on the review page)
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Please Answer Quickly
Answer:
Explanation:
A = nucleus
B= mitochondria for respiration and photosynthesis
I need help with Human Anatomy/Physiology I just need help with the explanations please. :)
Answer:
The arm is a great example. The muscle would be the biceps brachii and the bones of the shoulder and the arm. The biceps brachii allows you to do flexion -- bringing your forearm closer to your shoulder and Extenion -- extending your arm outward so that it is fully straight.
This looks like a project and will take a lot of time so I provided a starting place to look into.
Explanation:
Answer:
I will explain down below.
Explanation:
So basically if I am correct you are supposed to do a project based off of the skeletal muscle system. You want to, get a piece of paper or a poster and draw a representation on it, then describe what each of the terms are. I am not 100% sure, but I did a project like this before in the past.
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Answer:this is not even a question why are you asking incomplete questions that is a good way to get your self reported no offense i'm just trying to help you out optional what will help you with now is by clicking on that crown and i wont report you and no offense
Explanation:
Which organelle is most directly involved in energy transformations within cells?
A. chloroplast
B. nucleus
C. ribosome
D. endoplasmic reticulum
The two major cell organelles involved in energy transformation are mitochondria and chloroplasts. Thus option A is correct.
what is function of chloroplast ?Chloroplasts are the cellular organelle found in photosynthetic organism like plants and algae.
They are present in mesophyll cells of leaves and contain a high concentration of chlorophyll which absorb sunlight; It is absent in animal cell.
Chloroplast has extra-nuclear DNA and are semiautonomous.
They synthesize food by the process of photosynthesis by absorbing sunlight into chemical energy.
It is major production house of NADPH and molecular oxygen (O2) by photolysis of water; It produces ATP from photosynthesis.
It also indirectly involve in generation of carbon and sugar molecule during the Calvin Cycle or dark reaction of photosynthesis.
Thus option A is correct.
Learn more about chloroplast, here:
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2. True or false: a polio virus needs a host cell to replicate *
Answer:
true
Explanation:
a virus needs a host to replicate its like fleas they lay eggs on dogs to replicate
achondroplasia is a form of dwarfism in humans. it is caused by a mutant allele of the fibroblast growth factor receptor (fgfr) gene that produces an overactive protein. having one copy of the mutant allele results in dwarfism. having two copies of the mutant allele results in stillbirth. (infant dies in the womb.) which allele, the mutant allele or the wild-type allele, is dominant with respect to viability
Answer:
The correct answer is - wild type in respect of viability.
Explanation:
Achondroplasia is a condition of dwarfism and it takes place due to a mutant allele which autosomal dominant in nature which means only one copy of the mutant allele is going to cause dwarfism in an individual.
We also know that if two copies of the mutant allele are present then it will be lethal and will not be viable so in respect of expression the mutant allele is dominant, however, in respect of the viability, the wild type is dominant.
every cell in an organism has the same number of chromosomes except
Answer:
Neurons
Explanation:
Can earthquake sensors detect tsunamis
Despite the fact that the various protists observed in this exercise belong to different
eukaryotic lineages, what makes them all "plantlike" in nature?
Complete question: This can be seen in the attached file below. It's contains the various protists observed in the exercise.
Answer: For a eukaryotic organism to possess a plantlike characteristics shows its ability to manufacture its own food through the process of photosynthesis.
Explanation:
Protists are single- celled or unicellular organisms. They are made up of eucaryotic cells in which the cell structure is complex with a well - defined nucleus. Typical example if protists includes the following:
--> Volvox
--> Spirogyra
--> Euglena
--> Diatoms
--> chlamydomonas
Some protists are said to be plant like and are known as protophyta. Example of such includes Euglena, Spirogyra and chlamydomonas. This is because they have organelles called chloroplasts. This contains chlorophyll which enables them to make their own food through the process of photosynthesis. Photosynthesis is the process by which energy for sunlight is converted to high energy containing organic compounds such as glucose.
The ______ function of the nervous system is to gather ______ information and make decisions that affect ______ functions.
motor; integrative; sensory
motor; sensory; integrative
integrative; sensory; motor
Explanation:
integrative; sensory; motor
hope it helps!
Select the correct answer from each drop-down menu.
According to the principles of hydrology, what happens to the freezing point of water when you add salt and raise the water pressure?
According to the principles of hydrology, adding salt _____ the freezing point of water and ______ the boiling point.
1st Blank:
A. Raises
B. Lowers
C. Doesn’t change
2nd Blank:
A. Raises
B. Lowers
C. Doesn’t change
Answer:
1. B) lowers
2. A) raises
Which of the following is used to screen for carcinogenic potential of various compounds?
transformation testing
replica plating
Ames test
ELISA test
Answer:
Ames test
Explanation:
This is because Ames test is a test that uses bacteria strain i.e Salmonella typhimurium to check or assess of a chemical has carcinogenic effect of it. It uses mutagenicity of bacteria. It is a biological assay that test whether an a chemical can cause mutations in the dna of the test organisms. When mutagens are added and also liver enzymes, there would be a reverse mutation and this will lead to their growth