Answer:
A police officer who allows select people to enter and leave a crime scene.
Explanation:
This job of a police officer best describes the selectively permeablity function of a cell membrane in which it allows the entrance of some selected substances whereas blocks the entrance of unwanted substances.
Hope this helps
why was the early 20th
century model of the atom
flawed
Which describes a primary role of the pioneer species in an ecosystem?
O prevent fertile soil from washing away
O provide food for small animals
O protect other species from danger
•
break down rock into soil
A primary role of the pioneer species in an ecosystem is best describe by prevent fertile soil from washing away.
why are pioneer species so important for primary succession?They begin the method of breaking down the rock into soil that can keep plants and eventually that soil will provide rise to whole ecosystems of flora, fauna, and other organisms.
Thus, option "A" is correct, prevent fertile soil from washing away.
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Which of the following is a major risk factor for a noninfectious disease?
A virus
A bacterium
High cholesterol
Poor hygiene
Answer: High Cholesterol
Explanation:
Got it right on my test
High cholesterol is a major risk factor for a noninfectious disease. Option C is correct.
Non-infectious diseases are not caused by germs, but rather by other factors such as genetics, lifestyle, and environmental factors. High cholesterol is a major risk factor for several non-infectious diseases, including heart disease, stroke, and peripheral artery disease.
Viruses and bacteria are examples of infectious agents that can cause infectious diseases. Poor hygiene can increase the risk of contracting an infectious disease, but it is not a major risk factor for non-infectious diseases. The risk of developing many non-infectious diseases increases with age. Some people are more genetically predisposed to developing certain non-infectious diseases than others. Some people are more genetically predisposed to developing certain non-infectious diseases than others. Option C is correct.
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Why is it important for an organism to have high fitness (the ability to survive and make a lot of offspring)?
Answer:
An organism with high fitness has adaptations that are well suited to their environment allowing them survive and reproduce. An organism with low fitness has characteristics that are not well suited to their environment meaning they almost certainly die without reproducing.
Explanation:
List three sources of methane that are amplified by human activities.
The largest origins of methane emissions from human activities are oil and gas systems, livestock enteric fermentation, and trashyard.
What are the human sources of methane?Methane is cast from a mixture of human-influenced and natural sources.
Human-based emission sources contain landfills, oil and natural gas systems, agarian activities, coal mining, stationary and mobile burst, wastewater cure, and specific industrial processes.
Thus, are oil and gas systems, livestock enteric fermentation, and trashyards.
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Explain why water is essential for the process of seed germination.
Answer:
Water is an important external factor that triggers the process of germination. The seeds absorb the moisture and swells up. Then the hydrolytic enzymes become active which will break down the reserve food materials so as to make it available for the growth of embryo resulting in the germination.
Explanation:
water is essential for the process of seed germination because it helps by providing necessary hydration for the vital activities for protoplasm, provide dissolved oxygen for the growing embryo softens the coats and increase the seed permeability
geologists describe the rock cycle as ' nature's recycling system' what does it mean? please help
Answer:
The Rock Cycle is Earth's great recycling process where igneous, metamorphic, and sedimentary rocks can all be derived from and form one another.Older rocks are destroyed by weathering processes and the remains are recycled into new rocks. This cycle from old rocks to new rocks is called the rock cycle. The interaction between the tectonic and the hydrologic systems causes constant recycling of the materials of the Earth's crust.
Activate cytotoxic T cells and other helper T cells as well as activate B cells
(1 Point)
Helper T Cells
Interferons
Suppressor T Cells
Cytotoxic T Cells
Helper T-cells activate cytotoxic T cells and other helper T cells as well as activate B cells. Helper T cells are the most important cells in adaptive immunity.
What do you mean by Cytotoxic T cells?Cytotoxic T cells may be defined as a type of immune cell that can destroy certain cells, including foreign cells, cancer cells, and cells contaminated with a virus.
Helper T cell not only activates the B cell but also helps in the activation of cytotoxic T cells to destroy infected target cells. Helper T cells also reform or differentiate themselves.
Therefore, Helper T-cells activate cytotoxic T cells and other helper T cells as well as activate B cells.
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What are some of the implications of Directed Evolution?
Answer:
Adaptive laboratory evolution selects many genome-wide mutations that contribute to the fitness of actively growing cultures, whereas directed evolution typically targets a specific gene for mutagenesis and then screens the resulting variants for a phenotype of interest, often independent of fitness effects.
Explanation:
Answer:
Directed evolution is the laboratory process by which biological entities with desired traits are created through rounds of genetic diversification. It can also be created through library screening or selection and has become one of the most useful tools in basic biology. It's role includes improving the stabilities or biochemical functions of proteins by repeated rounds of mutation and selection.
More simply said, directed evolution is a mimic of the natural evolution cycle in a laboratory setting.
It has indirectly revealed that single amino acid mutations can enhance properties such as catalytic activity or stability and that adaptation can often occur through pathways consisting of beneficial mutations.
if you were asked to construct a power plant that uses only renewable energy sources, what type of energy would you use ? Explain.
Hello people ~
Science of cultivation, breeding, marketing and arrangement of flowers is called
(a) arboriculture
(b) floriculture
(c) horticulture
(d) anthology
Answer:
[tex]\longmapsto\: \red{ \underline{ \boxed{\frak{ hello \: mate }}}}[/tex]
Explanation:
Science of cultivation, breeding, marketing and arrangement of flowers is called --
(b) floriculture
Answer:
Floriculture
Explanation:
Floriculture comes under the branches of horticultureIt refers to flower bussisness and plantationIt also refers to breeding and marketing of flowersOption B
What is the most common tree in the taiga?
Answer: Conifers. A variety of conifers thrive in the taiga where they easily shed snow while keeping their needles all winter. The small needles of the conifers, which include black spruce, white spruce, balsam fir and jack pine, feature a waxy coating that helps minimize the loss of moisture.
Explanation:
Based on the excerpt, which statement best summarizes the author’s beliefs about the disappearing species? the loss of plant species and habitats will lead to widespread animal extinction. The loss of plant species and habitats will lead to environmental problems in remote regions. The loss of plant species and habitats will displace animals and decrease human wealth. The loss of plant species and habitats will devastate animals and hinder human progress.
The statement 'the loss of plant species and habitats will lead to widespread animal extinction' is TRUE.
What is biodiversity?The term 'biodiversity' refers to all types of diversity in the tree of life (e.g. phenotypic and genetic diversity).
Plants are producer organisms that sustain many different ecosystems and the biodiversity in these areas.
The loss of biodiversity (extinction of species) may completely disrupt an ecosystem in an irreversible way.
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Answer:
The correct answer should be The loss of plant species and habitats will devastate animals and hinder human progress.
Explanation:
Got it right edg2022
Describe Mandel's second set of experiments.
Answer:
Mendel observed that plants in the F1 generation were all alike. All of them had yellow and round seeds like one of the two parents. When the F1 generation plants were self-pollinated, however, their offspring—the F2 generation—showed all possible combinations of the two characteristics.
Explanation:
What is an adaptation
What is greenhouse gas?
A) a gas that people can breathe safely
B) a gas that absorbs and re-releases heat radiated by the earth
C) a gas that is created by artificial means
D) a gas that is used in growing tropical plants to increase biodiversity
Answer:
d
Explanation:
I don't know, I'm just assuming
How could you determine whether two groups of organisms that live in two different parts of the world were members of the same species, according to the biological species concept
Answer:
organisms belong to the same biological species if they can interbreed and produce viable fertile off springs
What poly-X genotype is likely to produce an individual that is tall, has various physical abnormalities, and is mentally impaired
The XXXX genotype is likely to produce an individual that is tall, has various physical abnormalities, and is mentally impaired.
What is a poly-X genotype?A poly-X genotype is a genotype where more than two X chromosomes are present in the cells of an individual.
A poly-X genotype is associated with an imbalance in gene dosage for the genes in the X chromosomes.
This imbalance leads to different health problems including phenotypic characteristics such as height.
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A developer wants to build a hotel along the Indian River Lagoon estuary in Florida. What impact
would this most likely have on the estuary?
1.) Decreased salinity of the estuary water
2.) Increased primary productivity in the estuary
3.) Loss of breeding and nursery grounds for marine species
4.) Loss of coral reefs and the species that live there
If this e-stuary is converted to a place used to build a hostel, there will be loss of breeding grounds for marine species.
What is an e-stuary?An es-tuary is a point where salt water and fresh water meet. The es-tuaries are characterized by changes in salt concentration.
Now, if this estuary is converted to a place used to build a hostel, there will be loss of breeding grounds for marine species.
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Earth revolves around the ____ which is at the center of our solar system. The blank revolves around the earth
In wild populations, individuals most often are found near available resources and show a _____ pattern of dispersion.
Clumped. Have a nice day!
Help me please!
How are crocodiles and chickens alike?
Answer:
Crocodiles are the closest living relatives of the birds, sharing a common ancestor that lived around 240 million years ago and also gave rise to the dinosaurs.
Explanation:
hope this helps
The only group of animals that begin their lives in the water breathing with gills and as adults can live on land breathing with lungs and go through metamorphosis is the ____? question 14 options: echinoderms mollusks amphibians reptiles
Answer:
C.
Explanation:
amphibians is the answer
Which percentage of the solar energy that the earth absorbs does the it's surface
radiate?
2
15
50
75
Answer:
The correct answer is is 71 percent. Give me Brainiliest
What statement is true as you go deeper into the ocean? Question 5 options: As ocean depth increases, temperature increases. As ocean depth increases, temperature decreases. As ocean depth increases, density decreases,
Answer:
As ocean depth increases, temperature decreases.
Explanation:
The sun plays a big part in the temperature of the water, and the higher you are, the more impactful the sun is. When you get much deeper into the water, the sun's rays can't warm as much, so the temperature decreases.
The statement that is true when one goes deeper into the ocean is that as ocean depth increases, temperature decreases, which is a second option, as the temperature of the ocean generally decreases as one goes deeper into the ocean.
What is the relationship between depth and temperature?As one goes deeper into the ocean, less sunlight reaches the water, and the water becomes colder, the density of seawater generally increases as one goes deeper because the pressure of the water increases with depth, causing the water molecules to become more tightly packed together. Density is another property of seawater and depends on the temperature, salinity, and pressure of the water, so when one goes deeper into the ocean, the pressure increases, which causes the density of the seawater to increase.
Hence, the statement that is true when one goes deeper into the ocean is that as ocean depth increases, temperature decreases, which is a second option.
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The question is incomplete, complete question is below,
What statement is true as you go deeper into the ocean? Question 5 options:
As ocean depth increases, temperature increases.
As ocean depth increases, temperature decreases.
As ocean depth increases, density decreases,
In an ecosystem, a deer consumes grass. what percentage of energy will the deer acquire from the grass? 0.1% 1% 10% 100%
About 10% of energy is transferred from the grass to the deer when the deer eats the grass.
Second law of thermodynamicsThe second law of thermodynamics pertains to the conversion of energy from one form to another. According to the second law of thermodynamics, when energy is converted from one form to another, the conversion is not 100% efficient.
Hence, only about 10% of energy is transferred from the grass to the deer when the deer eats the grass.
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Answer:
C-10%
Explanation:
When using PCR to study DNA, the base pairs split and the DNA cleaves into single strands. What stage of the process does this MOST accurately describe?
A. annealing
B. denaturization
C. extension
D. hybridization
The stage of PCR being represented by the the splitting of base pairs and the cleaving of DNA into single strands is denaturation.
What is PCR?PCR means polymerase chain reaction. It is a biological technique in molecular biology for creating multiple copies of DNA from a sample.
The stages involved in the polymerase chain reaction are as follows:
Denaturation of the template into single strands Annealing of primers to each original strand for new strand synthesisExtension of the new DNA strands from the primersTherefore, stage of PCR being represented by the the splitting of base pairs and the cleaving of DNA into single strands is denaturation.
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Answer:
denaturization
Explanation:
Denaturation defines the unfolding or breaking up of a protein, modifying its standard three-dimensional structure. Proteins may be denatured by chemical action, heat or agitation causing a protein to unfold or its polypeptide chains to become disordered typically leaving the molecules non-functional.
Duriing exercise, what body condition is the body trying to keep in homeotasis?
Answer:
Because in our body constant supply of oxygen is support to the cells to works out muscles properly
Explanation:
Which structure of a dolphin has the same function as the gills of a fish? question 2 options: fin heart lung mouth
Answer:
Whales and dolphins are mammals and breathe air into their lungs
Explanation:
They cannot breathe underwater like the fish can as they do not have gills.
Bird and mammals share features involved in the insulation of the skin. Which terms best describes this relationship
The feature which best describes this relationship is referred to as convergent evolution.
What is Convergent evolution?This is the condition in which organisms independently find the same evolutionary solution for the same environmental problem.
In this scenario, both birds and mammals found their way to tackle cold weather through insulation of the skin.
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