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Maksim231197 [3]
3 years ago
14

Which of the following came first in the scientific study of living organisms?

Biology
1 answer:
stira [4]3 years ago
5 0
The answer is:

A) light microscope
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seeds that are planted upside down are still able to grow into mature plants which explanation best explains this phenomenon?​
pav-90 [236]

Answer:

This question is incomplete but the completed question is below

eeds that are planted upside down are still able to grow into mature plants. Which explanation best explains this phenomenon?

(a)The roots change into branches, and the branches turn into roots.

(b)The roots grow toward the force of gravity, and the shoots grow away.

(c)The plant will become a smaller version of a mature plant.

(d)Roots always grow toward the dark, and shoots grow toward the light.

Two options appear to be correct here: options B and D

Explanation:

Regardless of the direction the seed is planted, the seed has the ability to re-position itself via the help of growth hormones that respond to gravity and redirect the seed into the proper orientation. However, after re-orientation of the seed, the root grows toward the direction of gravity (a process known as gravitropism) while the shoot grows toward the direction of sunlight (a process known as phototropism). Even though two options appear to be correct here, the most correct option based on he question is b

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2 years ago
Genes, which are the molecular units of heredity, are composed of specific sequences of four different__________.
Mashcka [7]

Answer:

Nucleotide bases.

Explanation:

Unique sequences of bases makes up a nucleotide. These nucleotide sequencing are used by DNA as a genetic code of information that determines type of cells, proteins and the whole organismal structure.

There are four nucleotide bases, Adenine and guanine termed purines are big, cytosine and thymine called pyrimidines are small. A purine pairs with a pyrimidine, such that adenine pairs with thymine and guanine pairs with cytosine. The bases are the same but each DNA uniqueness lies in the sequence of base pairing.

4 0
3 years ago
Before genetic engineering, insulin for diabetics was extracted from the pancreases of slaughtered animals. This was good becaus
r-ruslan [8.4K]

Answer:

There is a chance that the person receiving that insulin will get a bad immune response, and there is a possibility that the animal might have a disease or infectious organisms, that their insulin might contain, and putting it inside a human might transmit that disease.

Explanation:

6 0
2 years ago
Select the correct answer. Which component of the blood is part of the body's immune system? A. plasma B. platelets C. red blood
anastassius [24]
White blood cells, homie
4 0
3 years ago
Read 2 more answers
As an example of hormonal communication, when osmoreceptors of the _______________ detectdehydration, a signal to the posterior
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Answer:

A - Hypothalamus and Antidiuretic Hormones

Explanation:

Whenever their is a sudden change in the fluid level in the bodyb, either the blood, sugar, etc., the osmoreceptors, a special group of cells within the hypothalamus part of the brain, will detect this.

Thereafter, a signal is sent to the posterior pituitary gland to release the antidiuretic hormones (ADH), whose job is to maintain the fluid level by causing an increase in water reabsorption into the body through the expansion of the epithelial cells of the kidney.

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3 years ago
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