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alexandr1967 [171]
3 years ago
6

Which organ systems work together to supply nutrients and oxygen to the brain? A. the skeletal, immune, and excretory systems B.

the muscular, endocrine, and reproductive systems C. the nervous, lymphatic, and skeletal systems D. the digestive, respiratory, and circulatory systems
Biology
1 answer:
Maslowich3 years ago
5 0

Answer:

D

Explanation:

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Answer:

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2 years ago
Use the coarse-focus knob to raise the stage
natima [27]

Answer:

yellow

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6 0
1 year ago
What is the difference between self-pollination and cross-pollination?
Serhud [2]

The correct answer is that during cross-pollination the pollen grains are carried from one plant to another plant. During self-pollination, the pollen and ovules are from the same plant.

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3 years ago
A student used the hemoglobin data to conclude that mice and shrews are more closely related than are mice and humans or shrews
Lilit [14]
<span>The student who use the hemoglobin data to conclude that mice and shrews are more closely related than mice and humans or shrew and human is quite correct. Scientists had found a way of determining the evolution histroy of animals by means of the amino acid sequence of their hemoglobin. The higher the number of related amino acids found the closer the relationship between the two organisms. There are a difference of 29 amino acid between man and mouse and a difference of 24 amino acids between human and shrew but only a difference of 5 amino acid between mouse and shrew. This shows that mouse and shrew are closer.</span>
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