Which is a homologous structure to the human forearm?
O A. The beak of a bird
OB. The skull of a raccoon
O C. The tail of a dog
O D. The leg of a horse

The homologous structure to the forearm of humans is the leg of the horse.

Homologous organs are organs that share similar structural organization. They are similar structurally but are different in functions. They share common ancestors. These organs are anatomically similar. As there are common ancestors, this type of evolution is known as divergent evolution.

The reason behind the divergent evolution is environmental changes, and food requirements which force them to evolve according to the requirements. The wings of bats, the forearms of humans, and the front legs of the horse are a few examples of homologous organs which underwent divergent evolution.

Homologous organs have different functions in organisms.

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The space that an organism in an ecosystem lives in is called a

A) community
B) population
C) habitat
D) niche

True or false: Despite the large explanatory ability of evolution, no direct observations of evolution have been made.

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which of the following scenarios is least likely to have a detrimental impact on an ecosystem?

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B. people regularly engage in trolling catching numerous species as by catch.

C. people fish sharks for sharks fin soup at a faster rate than they can repopulate.

D. people fish bluefin tuna to the point that they become endangered.​

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Organisms decay in a solution.
Minerals dissolve and crystalize.
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flagella


large central vacuole


cilia


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1.
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George damaged a cranial nerve. His quality of life has decreased because he is no longer able to smile, move his mouth when he talks, or taste well. Which of the following nerves did George damage?

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The following diagram shows the branching tree for four kingdoms and some of their shared derived characteristics.

A slanting line is shown. There are four lines drawn vertically on this line at equal intervals. There is a black circle between each pair of these vertical lines. Protists, Plants, Fungi, Animals are written on top of each vertical line in order from left to right. Common Cell is written on the left most end of the sloping line. The second black circle has Mostly Multicellular written on it. The first black circle has X written on it.

What shared characteristic can be written at point X? Use complete sentences to explain your answer.

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