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Alexandra [31]
2 years ago
8

How do scientists know that evolution is taking place?

Biology
1 answer:
RUDIKE [14]2 years ago
8 0

Explanation:

Fossils are the remains of long-dead organisms, preserved in rock. Because rocks are laid down in layers, one on top of the other, the fossil record is generally set out in date order: the oldest fossils are at the bottom. Running through the fossil record makes it clear that life has changed over time.

BRAINLIST PLEASE!

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What is the type of inheritance shown in the following pedigree? Blue represents no disease symptoms, pink represents having dis
klasskru [66]

Answer:

Explanation:

If the disorder is recessive, neither parent has to have the disorder because

they can be heterozygous. The characteristic features of autosomal recessive inheritance is as follows:-

•Appears in both sexes with equal frequency

• Trait tend to skip generations

• Affected offspring are usually born to unaffected parents

• When both parents are heterozygous approx. 1/4 of the progeny will be affected

• Appears more frequently among the children of consanguineous marriages.

The given pedigree follows these features. So the correct option is 'Autosomal recessive trait'.

Please correct me If I am wrong :)

7 0
3 years ago
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While studying pharmacology, the nursing student learns that a naturally occurring narcotic drug with analgesic and antitussive
Elden [556K]

Answer:

Codeine

Explanation:

Codeine is an opiate and is used to treat mild and moderate pain. It is also the main ingredient in prescription based cough suppressant. It belongs to a class of drugs known as opioid analgesics.

Codeine is a naturally occurring phenanthrene alkaloid with opioid agonist and can be extracted directly from the plant although most codeine is synthesized from the opium poppy.

4 0
3 years ago
Which phase in the cell cycle consists of the cell readying itself for its division?
notka56 [123]
The answer to your question is A
3 0
3 years ago
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Why is chemistry important in the study of biology? 1-The body is composed of chemical elements. 2-Chemical reactions occur in t
Kamila [148]
Physical chemists study matter and energy, and there is chemical reactions in your body, and all living things have elements, like carbon.

I would say D
7 0
3 years ago
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Shamona, a pregnant mother in Flint, Michigan, is concerned about the drinking water, which shows high levels of lead. Shamona s
STatiana [176]

Answer:

Option (3).

Explanation:

Teratogens may be defined as the chemicals that can cause birth defects in the fetus. Substances like alcohol, lead and nicotine acts as the main agents of tertaogens.

Shamona is drinking water that contains high level of lead. The element lead is harmful for the fetus. Even the small concentration of lead is enough to cause birth defects. The lead exposure can cause the abnormal development of brain and damages the brain of fetus. The fetus has low birth weight also.

Thus, the correct answer is option (3).

6 0
3 years ago
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