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Savatey [412]
3 years ago
15

Down syndrome in humans may result from. A a person inheriting a recessive allele. B sickle-shaped cells becoming stuck in blood

vessels.c an extra copy of chromosome 21. D blood failing to clot properly.
Biology
1 answer:
katen-ka-za [31]3 years ago
8 0
C born with an extra chromosome
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Compare and contrast aerobic and anaerobic respiration. We need to discuss the following points: stages involved, locations in t
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Answer:

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Plz <br> I need answers to this help due tmrw
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vocabulary 1

1. DNA sequences

2. Homologous structures.

3. Paleontologist

4. analogous structures

5. fossils

6. vestigial

7. Comparative embryology

8. Comparative anatomy

vocabulary 2

1. DNA sequences

2. Analogous structures

3. Comparative anatomy

4. Fossils

5. vestigial

6. homologous structures

7. Comparative embryology

8. structure

9. Scientists

Explanation:

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2. Wings of bats and birds serve the same function and are analogous structure.

3. Comparative anatomy is the study of the similarities and differences in structures in similar species.

4. Fossils demonstrate that during the evolution of the whale, the whale moved from land to the sea.

5. The human tailbone and appendix are vestigial organs.

6. The homologous structures are structures that are similar in related organisms because they were inherited from the common ancestor.

7. Comparative embryology is the study of similarities and differences in the embryo of different species.

8. The forelimb of all the mammals has basic bone structure.

9. Scientists who find and study fossils are called paleontologists.

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Question 6<br> Which kingdoms have some organisms that can make their own food (autotrophic)?
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Answer:

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Explanation:

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Through the course of evolution, do species tend to become simpler or more complex?
Lapatulllka [165]

more complex {no kap}

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