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MrRa [10]
3 years ago
12

Darwin hypothesized that a new species could appear through small changes in an ancestral species. Which observation that he mad

e about finches most supports that hypothesis
Biology
1 answer:
sergeinik [125]3 years ago
3 0
He observed 15 different finch species that originated as one ancestral bird. all differing in body shape, beak size, and mating habbits
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The sides of the DNA ladder consist of alternating______ and phosphates
enot [183]

Answer:

sugar

Explanation:

The sides of the stepping stool are made of rotating sugar and phosphate particles. The sugar is deoxyribose. The rungs of the stepping stool are sets of 4 sorts of nitrogen bases. Two of the bases are purines-adenine and guanine.

3 0
2 years ago
3. What is the difference between cotyledons in dicot seeds and the endosperm in monocot seeds?
cupoosta [38]

Explanation:

Monocots contain a single cotyledon in their seed and dicots contain two cotyledons. The nutrients in the endosperm of dicots is absorbed by the two cotyledons. Therefore, a tiny endosperm is found inside the dicot seed. However, the main difference between cotyledon and endosperm is in their function during seedling.

7 0
2 years ago
1 point
ipn [44]

Answer:

Trophic Cascade

Explanation:

Trophic cascade is when the ecosystem experiences a level of a certain species being reduced or removed.

8 0
3 years ago
What structural component gives arteries the ability to passively adapt to changes in blood pressures that accompany the heartbe
Andrews [41]

Answer: elastic fibers

Explanation:

Elastic fibres are the essential durable component present in mammalian connective tissueand functions to provide proper pulmonary,  cardiovascular and intestinal system structure and function. Their structural function is to provide elastic recoil and resilience for the tissues.

Elastin fibers ahve two main including microfibrils and elastin containing fibrillin play a mechanical and structural role in the arteries, and their important function is to provide the tissues with resilience and elasticity.

Hence, elastic fibers helps arteries to adapt to changes in blood pressures that accompany the heartbeat.

5 0
3 years ago
Which species are more closely related: Rhino and owl or rhino and goldfish? How do you know?
Oksanka [162]

Answer:

Rhino and owl are closely related.

The are closer on the limb.

Explanation:

This is because cladogram can be used to show species that are closely related. It is a diagram that indicates evolutionary relationships that exist between organisms.

Owl and Rhino are closely related because they have some traits in common and their limbs are close

6 0
3 years ago
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