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Answer:
The heart valves
Explanation:
The heart valves prevent blood from flowing in the wrong direction in the heart. The valves are held in the proper place because of the chordae tendinae.
By following honeyguides (a species of bird), people are able to locate bee's nests to harvest honey. In fact, research now reveals that humans use special calls to solicit the help of honeyguides and that honeyguides actively recruit appropriate human partners. this relationship is a rare example of cooperation between humans and free living animals.
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C because he is making a hypothesis that coloration which is the independent variable is making the change.
Weather, climate and seasons are factors that limit the distribution of different species of living beings in ecosystems, influencing survival and reproduction.
<h3>What are the biotic and abiotic factors of an ecosystem?</h3>
Biotic factors are each of the living organisms of an ecosystem and abiotic factors are all non-living ones such as organic and inorganic substances in the system as well as environmental conditions.
Weather, climate, and seasons could affect these factors in altering the distribution of species, but would also decrease primary production, which would affect survival and growth.
Therefore, we can conclude that the weather, climate and seasons are factors that limit the distribution of different species of living beings in ecosystems, influencing survival and reproduction.
Learn more about biotic and abiotic factors of an ecosystem here: brainly.com/question/14416115
