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yaroslaw [1]
3 years ago
6

Bird feathers are modified scales.a. Trueb. False​

Biology
2 answers:
Mademuasel [1]3 years ago
8 0
A. True, they are modified scales
OleMash [197]3 years ago
3 0

Answer:

A. True.

Explanation:

True. b is wrong

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RideAnS [48]

Answer:

Changing their external environment

Explanation:

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4 years ago
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You are a scientist researching West Nile virus, a mosquito-borne pathogen. You note that a number of cases of West Nile disease
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       It all starts with observation, so we need to check all the data we have and all the information that can be collected to have a good thought on what's going on.

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5 0
4 years ago
What are the coefficients in the expression: -5r + 3y - 16 + 9y
11111nata11111 [884]

It's gonna be

9y +3y -5r -16

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7 0
3 years ago
What started the study of the field of genetic engineering?
Margaret [11]

Answer:

Genetic engineering has its grass roots from the recombinant technology.

Explanation:

Genetic engineering is seen to have started from a scientists activity which involved restriction enzymes and DNA ligases that were used by Paul Berg in 1972 to create the first recombinant DNA molecules. A monkey virus which is SV40 was combined with a lambda one. Following that, the results of the experiment and attempts were further investigated by other scientists and later, the first plant that underwent genetic engineering was the plant tobacco.

8 0
4 years ago
For the study of a particular drug, Marcus proposes an experiment with a particular population. Approximately 200,000 people in
Goshia [24]

The missing part of the question is as follows:

Phrase indicates a limit to the scientific accuracy of the experiment?

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The correct answer is - a sample size of 300 people.

Explanation:

In the given research Marcus developed a drug that is already 200,000 people taking the drug, and the scientist takes sample size of only 300 people for the experiment.

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3 years ago
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