The correct answer is option D) competition.
The given case says the great hornbill and the toucan share the same food source in the same habitat, which means there is a competition for the food between great hornbill and toucan. As the hornbill's large bills help them in getting food, they have more chances of getting food as compared to toucans. As a result, the food source of the toucan would be exploited by great hornbills. So, in this case, the limiting factor for toucans would be competition for the food.
The independent variable influences and causes a change in the dependent variable. <em>Hunting </em>-independent variable- influences on the species <em>population sizes</em> -dependent variable-.
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<u>Available data:</u>
- Question: Are endangered birds populations increasing by being
protected from hunters?
- Methodology: Counting the number of Whooping Crane, California
Condor, and Black Swans every ten years.
Before conducting the experiment, researchers need to identify the study groups –experimental and control groups- and the variables involved.
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<em>⇒ The</em><em> study groups</em><em> are the</em><em> species</em><em> Whooping Crane, California Condor, and Black Swans.</em>
⇒ Variables
- Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is modified to analyze its effects on another variable. The researcher changes on purpose the independent variable to observe the response of the dependent variable.
<em>In the exposed example, the independent variable is </em><u><em>hunting</em></u><em>. Hunting </em><em>affects </em><em>the previously mentioned </em><em>species</em><em>, moreover because they already are endangered species. So </em><em>excessive hunting</em><em> might cause species </em><em>extinction</em><em>. Reduced or </em><em>controlled hunting</em><em> might help the</em><em> population sizes </em><em>to remain</em><em> constant.</em><em> But </em><em>no hunting </em><em>at all might be closely related to an </em><em>increase</em><em> in their </em><em>population sizes</em><em>.</em>
- Dependent variable: Refers to the variable, which response depends on any change in the independent variable. Any change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable.
<em>In the exposed example, the species </em><em>population sizes</em><em> are the </em><em>dependent variables</em><em>. Researchers measure every ten years how many animals of each species remain in the study area. These numbers </em><em>depend</em><em> on </em><em>hunting</em><em>, and their changes are </em><em>inversely proportional</em><em> to the change in </em><em>hunting</em><em>. An increase in hunting means a decrease in the species population size. a Decrease in hunting means an increase in the species population sizes. </em>
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Related link: brainly.com/question/19585043?referrer=searchResults
The answer is B) Yes, all organisms use DNA for the production of proteins.
Answer:
it is b
Explanation:
because a virus particle attaches to a host cell the particle releases its genetic instuction into a host cell. the injected genetic material recruits the host cells enzymes the enzymes make parts for more new virus particles