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shepuryov [24]
2 years ago
8

Consider the diversity of the later Homo species discussed in this lab. Why do you think our direct ancestor survived when the o

ther species (or subspecies) went extinct? (0.25 points) Be sure to describe specific physical or behavioral characteristics that you think may have made our human ancestor better adapted than the other species. (0.25 points) HTML EditorKeyboard Shortcuts
Biology
1 answer:
MissTica2 years ago
5 0

Explanation:

<em> Homo sapiens</em> has dominated the world because of the features they evolved to adapt in the living conditions.

The physical characteristics that are developed by the<em> Homo sapiens</em> are:

1. Bipedalism- enabled the species to survive in grasslands and forests, to run after the prey to eat them.

2. Brain size- the increased size of the brain allowed the species to understand and analyse the world from a new perspective.

3. The use of hands as a tool to use the natural resources.

4. Sexual dimorphism- allowed the species to raise babies with more care.

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Humans, like other organisms, require energy for growth and repair. When cells create ATP for energy, carbon dioxide is produced
ad-work [718]

Answer:

The circulatory and respiratory systems interact to transport carbon dioxide to the lungs, where it is expelled from the body.

Explanation:

Carbon dioxide produced by the cells and tissues during cellular respiration is removed from the body through the interaction of the circulatory and respiratory system. The medium of transport of carbon dioxide is the blood which carries to the lungs, where it is expelled from the body in ordernto maintain homeostasis in the body.

Carbon dioxide molecules are transported in the blood from body tissues to the lungs in three ways:

1. Dissolution directly into the blood - due to its greater solubility in blood than oxygen, carbon dioxide is dissolved in blood plasma. On reaching the lungs, it leaves the blood by diffusion and is then expelled out of the body.

2. Binding to hemoglobin - carbon dioxide binds reversibly with haemoglobin in the red blood cells to form a molecule called carbaminohemoglobin. When it reaches the lungs, the carbon dioxide freely dissociate from the hemoglobin and is expelled from the body.

3. Carried as a bicarbonate ion - the majority of carbon dioxide molecules are carried as part of the bicarbonate buffer system. In this system, carbon dioxide diffuses into the red blood cells. The enzyme carbonic anhydrase within the red blood cells quickly converts the carbon dioxide into carbonic acid (H2CO3) which then dissociates into bicarbonate and hydrogen ions. The bicarbonate ions leaves the red blood cells in exchange for chloride ions in the plasma. The bicarbonate ions then travel in plasma to the lungs, where they enter the red blood cells again. It combines with hydrogen ions from the haemoglobin to form carbonic acid. Carbonic anhydrase breaks carbonic acid down into water and carbon dioxide which is then expelled from the lungs.

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Bioaccumulation of this chemical lead to bird eggs with weak shells and nonviable offspring:
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Bio accumulation of DDT lead to bird eggs with weak shells and non viable offspring. The lethal effects of DDT on birds was first noted in 1950; scientists discovered that earthworm was accumulating the DDT pesticide and that the robins that were preying on the earthworms were been poisoned. Further research revealed that the chemical cause thinning of the egg shell and production of non viable offspring. The chemical has since been banned in USA.
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Over population if i recall correctly

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