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kherson [118]
3 years ago
7

What influence does acid rain have on seed germination?

Biology
1 answer:
Fed [463]3 years ago
3 0

Answer:

Acid rain is an umbrella term, which is used

to cover a number of different pollution

processes. The pH of acid rain is ten, fold

difference between numbers. India illustrates

the drastic effect of acid rain on agricultural

productivity researchers there found that

wheat growing near a coal fired power plant

where SO2 deposition was almost five times

greater than the critical load (the amount of

the soil can safely absorb without harm)

suffered a 49% reduction in yield. In the

present investigation to assess the effect of

acid rain on the plant growth, the plant of

Triticum aestivum and Raphanus sativus

were grown in different wooden boxes and

three different plastic boxes. The different pH

(2.0, 4.0, 5.0) of simulated rain does were

sprayed on the plant and after last dose the

specific visual difference was seen in seed

germination. increased acidic level (pH 2.0) of the rain water affects the seed germination by the rate of 40% as compared to that of lower level of acidity (pH 4.0 and 5.0)

Explanation:

<h2><em>Hope it help you mark as Brainlist</em></h2>
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What blood vessel is a tributary of the hepatic portal vein?
inysia [295]

According to the research, the linear vein is a tributary blood vessel of the hepatic portal vein.

<h3>What is the hepatic portal vein?</h3>

It is a blood vessel that carries deoxygenated blood from the digestive organs and the spleen to the liver.

The linear vein is one of the branches of the celiac trunk that supplies the spleen and gives off branches to the stomach and pancreas.

Therefore, we can conclude that according to the research, the linear vein is a tributary blood vessel of the hepatic portal vein.

Learn more about the hepatic portal vein here: brainly.com/question/15511202

#SPJ12

7 0
2 years ago
Innate immunity________.
labwork [276]

Answer:

The answer is A.

Explanation:

Since only 1 of the options is wrong, i assume you are looking for that one.

Two types of immunity systems, innate immunity and adaptive immunity. Adaptive immunity is formed when it is exposed to a harmful substance, vaccines for example create adaptive immunity.

Innate immunity is present at birth which consists our skin protects us physically, chemical substances in our blood that protect us from bacteria and infections and also our blood cells such as T cells.

Since innate immunity forms one of the first lines of defense in our immune system and is the first to respond to a threat in a few hours down to as little as minutes, it is not slower than adaptive immunity in its response to infections and pathogens.

I hope this answer helps.

4 0
3 years ago
If zoologists wanted to study how tigers interact with each other in their habitats, which of these research methods will they m
alex41 [277]

Answer:

naturalistic observation

Explanation:

The best possible way to study how tigers interact with each other in their habitats would be to use a naturalistic observation. This type of observation focuses on observing the main subject of the study in it's natural environment without interfering in any sort of way. This allows the scientists to observe exactly how the tigers interact when there are no humans around.

6 0
3 years ago
Read 2 more answers
An open-minded scientist does all of the following except
avanturin [10]
Im not for sure but i think its D if that helps any
7 0
3 years ago
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Question 7 in the attachment, please help thank you so much!
sertanlavr [38]

Answer:

Here are the answers:

a. 4  Cell determination as an issue in the *rest is missing*

b. 4  They assumed that different ways of separating an embryo into two parts would be equivalent as far as the fate of the two parts was concerned.

c. 4  I and III only

Explanation:

The passage demonstrates the importance of two factors in the development of an embryo: cleavage planes of division of embryonic cells and cell differentiation.

Cleavage Planes:

Cleavage basically refers to the division of the zygote into a large number of cells called blastomeres. Cleavage planes are geometrical lines or orientations along which cleavage takes place. Since, all embryonic cells are the precursors of some type of body cells, the cleavage planes determine if the cells are adequate for growth and development.

Cell Differentiation:

Cell differentiation is the transition of an undifferentiated cell into a specialized one. For example, stem cells are undifferentiated cells that develop into progenitor cells that mature into a specific cell lineage. For an embryo to regenerate, the presence of adequate embryonic stem cells is crucial. Embryonic stem cells are present in abundance before the gastrulation phase of embryonic development, after which they rapidly start differentiating.

5 0
3 years ago
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