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Paul [167]
2 years ago
10

5. The theory of common descent states that all modern organisms

Biology
1 answer:
makkiz [27]2 years ago
3 0

Answer:

B

Explanation:

All living beings are in fact descendants of a unique ancestor commonly referred to as the last universal common ancestor (LUCA) of all life on Earth, according to modern evolutionary biology. Common descent is an effect of speciation, in which multiple species derive from a single ancestral population.

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Explain how paleoclimatologists (scientists that study climate change) use fossils and other records to study climate change.
marysya [2.9K]

Answer:

paleoclimatologists use different sources of information from fossils in order to record past climate and environmental conditions (for example, tree rings or skeletons of coral reefs)

Explanation:

Paleoclimatology is the discipline that studies ancient climate and environmental conditions. Paleoclimatologists are researchers that analyze different sources of evidence to obtain accurate records of past climate conditions. In this regard, the fossil record has proven to be a useful tool to obtain such information. For example, the rings of fossilized trees are usually wider during warm and wet years, while these rings become thinner during cold and dry years. Moreover, geochemical records from the skeletons of fossil corals (composed of calcium carbonate) are good indicators of past climate conditions because coral growth is sensitive to small fluctuations in water temperature. Paleoclimatologists also use non-biological climate indicators (e.g., sediments and ice sheets) to reconstruct past climate and environmental conditions.

6 0
2 years ago
Why can food chains
lana66690 [7]

Answer:

A. Because energy is lost at every level.

Explanation:

energy decreases as it travels from lower levels to upper levels--which is a logical observation you could make.

Think of it like this--if a fish eats a small organism, it will then spend some of the energy obtained from the organism swimming around--so when a larger fish eats our fish, the energy from the original organism will already be partially lost (from our fish swimming around).

This means that when this pattern continues over multiple levels, we keep losing energy--which limits the environment's capacity for organisms to survive.

Hope this helps, have a lovely day :)

3 0
1 year ago
What are the only kind of cells that mitosis cannot create/duplicate?
Ludmilka [50]

Answer:

Mitosis produces all animal and plant cells, tissues, and organs excepts for the gametes ( the eggs and sperm). Since mitosis produces genetic clones of the parent cell when it divides, all animal and plant cells that grow from a fertilized egg (zygote) are more or less genetically identical.

Explanation:

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6 0
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