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oee [108]
3 years ago
7

How do index fossils help scientists?

Biology
1 answer:
krek1111 [17]3 years ago
5 0
Answer: Index fossils are used to identify layers of rocks. The layers will form an arrangement that relates to their age. In simpler terms, a layer that contains fossils are unique to that certain layer.
Index fossils are fossils that are mostly used by scientists due to it being easily found anywhere around the world and in abundant amounts. It can also be easily identified since they are fossils of widely varied organisms that lived during one short time period.
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What is photosynthesis? What does it involve?
jok3333 [9.3K]
Photosynthesis is the process used by plants and other organisms to convert light energy into chemical energy
4 0
2 years ago
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Full induction of the lac operon occurs when _____. Select one: a. lactose levels are high and glucose levels are low b. lactose
babymother [125]

Answer:

The suitable option will be - A.

A.  lactose levels are high and glucose levels are low

Explanation:

  • Lac operon :

It is a operon that is regulated by a set of genes and is regulated altogether and is transcribed into a single RNA in the presence of lactose.

  • It is mainly found in  E.coli. Lac operon is mainly used for lactose metabolism. There are 3 genes in this system - lacZ, lacY, and lacA.
  • LacZ codes for β-galactosidase which cleaves lactose into glucose and galactose. LacY codes for Beta-galactoside permease, which helps in the entry of lactose in the cell. LacA codes for Galactoside acetyltransferase.

4 0
3 years ago
Specialized cells called _____ help an animal to detect stimuli
poizon [28]
It's called Stimuli
7 0
3 years ago
Which effect would you expect a Species Survival Plan to have on the crested
babunello [35]

The correct answer is A. Scientists reintroducing crested toads into the wild.

Explanation

Species Survival Plan is a conservation program promoted by conservationists and zoologists that specializes in those animals that are near extinct, endangered, or threatened. This program mainly aims to breed these species in captivity to ensure their future preservation and reintroduction to nature. According to the above, the effect that could be expected from the implementation of the Species Survival Plan in Puerto Rico with the crested toads would be the reintroduction of this species into the wild after being bred in captivity.

4 0
2 years ago
Plz help me this is due soon<br> anwser bot questions
Anna35 [415]

Answer:

response

Explanation:

a reaction after organism depicts a change in the environment

8 0
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