Answer:
B
Explanation:
I took bio last year
Over the past 60 years, many amphibian species have experienced significant population declines and some species have become extinct. Scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. However, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. These global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. In Switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. Some biologists urge the collection of the few remaining individuals of some of the most threatened amphibian species, to preserve them if they become extinct in the wild. If such captive breeding programs could produce thousands of individuals from just a few of the remaining survivors, the species will still be threatened because of ______.
Answer:
a bottleneck effect
Explanation:
Genetic drift refers to the change in the allele frequencies in a population due to chance (random) events. The bottleneck effect, also known as population bottleneck, can be defined as a severe case of genetic drift caused by a drastic reduction in the population size. The bottleneck effect is well known to cause the loss of important genetic variation since alleles that were present in the original population are lost, thereby limiting its genetic diversity. One of the most common causes that may lead to a population bottleneck in a natural population is environmental disasters (e.g., earthquakes, floods, etc).
porque a los seres vivos se los consideran sistemas abiertos y complejos?
Explanation:
los seres vivos pueden considerarse sistemas abiertos porque cada ser vivo es un sistema complejo constituido por un conjunto de subsistemas que interactúan y funcionan por un objetivo en común, la conservación y la continuidad de la vida.
1.Which of the following distinguishes the role of a floriculturist?
forces bulbs for seasonal sales
provides attractively arranged flowers for the cut-flower trade
grows flowers for gardeners, landscapers, and florists
specializes in greenhouse production of flowers
Keeping records of employment training is important if your establishment ever needs to provide proof of training in court.
False
True
Write the equation for cellular. Plz help!!!!
Answer:
C 6 H 12 O 6 + 6 O 2 --> 6 CO 2 + 6 H 2 O + ATP
Explanation:THANK ME LATER
When a cell is deprived of oxygen, its lysosomes tend to burst and release their contents into the cell. As a result of this, that cell will Group of answer choices undergo cell division. recycle damaged organelles. produce replacement lysosomes. undergo self-digestion and die.
Answer:
The correct answer is - undergo self-digestion and die.
Explanation:
Lysosomes are cell organelle that is membrane-bound and has digestive enzymes in them. These cell organelle help in digesting cells that are worn out, ruptured cells deprived of oxygen by bursting themselves.
Its bursting nature also helps in digesting and killing antigens and microbes. It is a very essential cell organelle that helps in digesting and killing damage cell parts or cells.
When a cell is deprived of oxygen, its lysosomes tend to burst and release their contents into the cell, the cell will undergo self-digestion and die.
Explanation:
Lysosomes are cell organelles that are membrane-bound and contains digestive enzymes. These cell organelle help in breaking down cellular waste. When the cell is deprived of oxygen they burst themselves and release their content. It is a very essential cell organelle that helps in digesting and killing damaged cell parts, microbes, antigens, or cells.So, from this we can conclude that when a cell is deprived of oxygen, its lysosomes tend to burst and release their contents into the cell, the cell will undergo self-digestion and die.
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Select the correct answer. If pinecones are placed in water, they close up. But they open up in warm and dry conditions. How do pinecones benefit from this characteristic? choices in pic
Answer:
B: it protects the seeds from unfavorable conditions
Explanation:
While the pinecone is developing its seeds, it is vulnerable to wet conditions, which can cause rot.
4. Kaden is hanging out at Mason's house. They have been friends forever. They
are playing a video game when, all of a sudden, Mason leans over and kisses
Kaden. Kaden is shocked and doesn't know how to respond. Mason continues
kissing Kaden and starts to touch Kaden. Kaden pulls away and explains the
uncomfortableness of the situation. Mason insists they have strong feelings for
each other and need to take it to the next level. Mason continues to encourage
Kaden to just let it happen. Kaden is still hesitant. Finally, Mason realizes Kaden is
not consenting since Kaden has not actively said "YES" and decides to talk about
it. Mason is correct to stop and talk instead. *
True or false?
Answer:
true
Explanation:
you should never proceed with sexual advance, or any advance really without a for sure verbal consent given.
Prokaryotes play essential roles in the environment and industry. Which statement describes the benefit of nitrogen fixation, a process that certain prokaryotes perform? (1 Point) a. Genetically-engineered bacteria synthesize drugs and chemicals. b. Bacteria clean up oil spills and or remove waste from water. c. Bacteria break down dead organisms and cycle materials back into the environment. d. Symbiotic bacteria on the roots of legumes help supply nutrients to the plant.
Answer:
d. Symbiotic bacteria on the roots of legumes help supply nutrients to the plant.
Explanation:
Symbiotic bacteria on the roots of legumes help supply nutrients to the plant by fixing atmospheric nitrogen done by nitrogen fixing bacteria. There are some bacteria present in the roots of plants which fixes atmospheric nitrogen and convert in available form to the plants and in exchange the plant provides food and habitat to the bacteria that performs nitrogen fixation.
What is the RNA sequence that corresponds to this DNA sequence? ACC GCG
TAT GCT *
TGG CGC ATA CGA
O UGG CGC AUA CGA
O ACC GCG UAU GCA
ACC GCG TAT TTT
Answer:
O UGG CGC AUA CGA
Explanation:
How many alleles are in the gene pool?
Answer:
40 b alleles
Explanation:
Only 40 b alleles are present in the gene pool, so genetic diversity is lower. The use of gene pools allows population geneticists to see variation and the influence of natural selection in detail. A single gene may show significantly less genetic variation than the variation within the whole genome of a population
Answer:
17
Explanation:
What are some of the limits of science?
Answer:
Empirical limits in science
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My AnswerMust deal with observable measurable phenomenon.Science can describe not explain.No experiment can be completely controlled.Observations may faulty.A mans belief effects his judgment.Science must deal with repeatable results.Science cannot deal with values or morals.#CarryOnLearningBrainliest please
What kingdom would a bacterial organism that survive a harsh environment be place in
Answer:
Archaebacteria
Explanation:
These organisms are classified in the kingdom Archeabacteria. These are found in extreme enviorments such as hot boiling water and thermal vent under conditions with no oxygen or highly acid enviorments
The sequence of subunits in a protein is most directly dependent on the *
O region in the cell where enzymes are produced
DNA in the chromosomes in a cell
O type of cell in which starch is found
kind of materials in the cell membrane
Answer:
cell- optycritisynosim- lufoodoosaa- lemon pie- arteriy- scadoosh- blue 1- yellow 5- rtyu
Explanation:
my mom told me the answer hope this helps:))
How could the notion of maximum parsimony lead to an error in establishing an
evolutionary relationship?
a) It focuses on the most divergent paths for evolution.
b) It focuses on counterintuitive and complex connections.
c) It focuses on simple and obvious connections.
d) It focuses on the most convergent paths for evolution.
Answer:
5 / 5 points
How could the notion of maximum parsimony lead to an error in establishing an evolutionary relationship?
It focuses on simple and obvious connections.
Explanation:
This concept instructs scientists to make the simplest and most obvious connections when tracing evolutionary relationships throughout history. If a counterintuitive or surprising evolutionary process occurred, maximum parsimony would exclude this.
Answer:
It focuses on simple and obvious connections
Explanation:
Just did the test and got it right. Hope this helps :)
Which component is releases from the active site of an enzyme during a chemical reaction
hi so i just received a death threat from +592 6034153,can someone pls help me find the identity of this person and pls put a pic of the person.
Answer:
below
Explanation:
you can report this to the cops or a older authority. Posting a picture is a form of doxxing and can be illegal or a form of witchhunting.
1. Members of a Boy Scouts troop were advised by their leader to take water with them on their hike into the mountains. One boy decided to drink a large quantity of water before leaving on the hike. Explain how his body functions to deal with the excess water.
2. Explain why the composition of urine produced would differ in someone who drank a lot of water compared to someone who had no water for over 24 hours.
The diagram below represents the time a cell spends in the two main phases
of the cell cycle. In which phase does a cell spend more time?
A. Prophase
B. Mitosis
C. Meiosis
D. Interphase
Answer:b
Explanation:
The cell spends more time in the meiosis phase. Therefore, option "C" is correct.
What is meiosis?Meiosis is a type of cell division in sexually reproducing organisms, therefore, producing gametes. In this process, the number of chromosomes is reduced in the gametes. These cells are known as haploid cells. The examples are sperm and ovum.
There are two phases of meiosis: meiosis I and meiosis II. Meiosis I has four stages whereas meiosis II has three stages. In meiosis I, a cell divides into two genetically distinct haploid cells. In meiosis II, the two divided haploid cells divide further in two cells. Total four cells are produced in the process of meiosis.
Meiosis is an important cell division process in sexually reproducing organisms. It is used in the production of gametes in both males and females organisms.
Therefore, meiosis take more time than mitosis due to double stages.
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What happens to interspecific and
intraspecific competition as habitats
decline?
A. competition increases
B. it depends on the habitat
C. competition remains the same
Members of the same species compete with one another within their own species, hence option A is correct.
What is the interspecific and intraspecific competition?It demonstrates the adaptability of the species. Members of various species compete with one another across interspecific boundaries. It might result in the extinction of one species or the specialization of both.
In a population, individuals develop, procreate, and pass away. The needs of individuals within a population for survival, growth, and reproduction are quite similar. The result is frequently intraspecific competition.
The fitness of both populations is impacted by competition. The investment of resources (energy, time, and matter) in competition or avoidance of it diminishes the availability of these resources and has a negative impact on the population's ability to reproduce.
Therefore, option A is correct.
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Can someone help please?
Explain how the adaptive changes in coat-color genes allowed mice to travel under the radar of hungry predators.
Answer:
This:
Explanation:
These adaptive changes help in ways best seen between desert mice and those who live in darker habitats. While desert mice often developed extremely light colored coats to blend best with the environment, mice who live in forest's or valleys often have darker coats to blend with foliage and trees. These coats that help camouflage with the environment protect mice in the open from being snatched by say a eagle or bird of prey. And mice who blend equally with foliage are protected more from ground predators like other small foxes or rodents
Which of the following best explains what may be happening in the
other structures in the video based on what you know from the
article.
Answer:
Different types of liquids from the fractioning tower are moved to different structures to be further prepared for use.
Explanation:
E2020
In a sewage treatment facility, an optimal environment is maintained for the survival of naturally occurring species of microorganisms. These organisms can
then break the sewage down into relatively harmless wastewater. For these microorganisms, the wastewater facility serves as
1.
its carrying capacity
2.
a food chain
3.
an ecosystem
4.
an energy pyramid
In a sewage treatment facility, an optimal environment is maintained for the survival of naturally occurring species of microorganisms. These organisms can then break the sewage down into relatively harmless wastewater. For these microorganisms, the wastewater facility serves as an ecosystem.
What are an ecosystem and examples?Ecosystems are the foundation of the 'Biosphere' and maintain the natural balance of the earth. For example, let's take the relationship between sheep and lion in the ecosystem; for its survival, the lion eats the sheep. And each relationship like this has an effect on other creatures and plants living in the same area.
What is the importance of the ecosystem?It provides a habitat to wild plants and animals. It promotes various food chains and food webs. It controls essential ecological processes and promotes lives. Involved in the recycling of nutrients between biotic and abiotic components.
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Why mitochondria is the Power House of the cell??
What was the purpose of Hardy and Weinberg´s work?
A) To learn where genetic information is stored
B) To count the total number of alleles in the world
C) To learn how to control the mating of organisms
D) To determine how allele frequency changes
Answer:
Is D
Explanation:
check picture so match the answer
The solutions in a u shaped tube are sapersted by a permeable membrane. The membrane is preamble only to water. Side a contains the lower concentration of sugar. What is side b
Answer:
https://youtu.be/GxztO8MM9F4
Explanation:
Herbicides are chemicals that kill plants by interrupting important biological processes. Different herbicides affect different plant processes. The herbicide atrazine prevents the chemical reactions that use energy from sunlight.
A plant is sprayed with atrazine.
Exposure to atrazine causes an immediate decrease in the production of two substances in plant. Select the substance.
A. DNA
B. Carbon dioxide
C. Oxygen
D. Phospholipids
Answer:
oxygen because that's one of the substance that plants produce.
You can also do this by the process of elimination. Knowing that atrazine impedes the production of substances in plants, we know that it can't be DNA and Phospholipid. Carbon Dioxide is used by plant, not produced; thus, oxygen is the answer.
A herbicide is a type of pesticide that is used for controlling the weeds so that the plants can get nourishment. They are common weed killers used to clear taw waste groups and constructional areas.
These herbicides are used for different plants and prevents the chemical reaction that makes use of energy. The plants are sprayed with the chemical called atrazine which is used to decrease the production of oxygen.Hence the option C is correct.
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Neurons are best described as which one of these
A. Cells that conduct electrical impulses throughout the body.
B. Thin projections that extend from a cell and connect to other cells.
C. An insulating lipid layer.
D. Cells in the brain that control hormone release.
Thanks!
Answer:D
Explanation: got it right
The neurons are the cells that conduct electrical impulse throughout the body. The correct option is A.
What is nerve impulse?The signal commutes along the height of a nerve fiber and results in neurotransmitter release.
Neurons are the basic units of the brain and nervous system; they are the cells that receive sensory input from the outside world and sending motor commands.
Nerves carry information along the neuron and all over the nervous system via nerve impulses.
Thus, the correct option is A.
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How is an exothermic reaction identified?
A. It has a large heat of formation.
B. It uses electromagnetic radiation.
C. It requires heat as a reactant.
D. It gives off heat as a product.
Answer:
D
Explanation:
it gives off energy as a product
Remembering an important date in history because it is the same date as your father's birthday is an effective type of learning because