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lisabon 2012 [21]
3 years ago
10

Bacteria is a first line of defense for our immune system. true or false a. true b. false

Biology
1 answer:
hichkok12 [17]3 years ago
6 0

Answer:

The answer is b. false.

Explanation:

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The atmosphere is 80% nitrogen: why do you think plants and animals can't use nitrogen as it is found in the atmosphere?
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Answer: Atmospheric Nitrogen is unreactive

Explanation:

The atmosphere is made up of about 80% Nitrogen, 16% oxygen, about 4% carbon dioxide, rare gases etc.

However, the 80% Nitrogen is highly unreactive, and needs to be trapped by competent micro organisms known as nitrogen-fixing bacteria in the root nodules of legumes.

Then, it is converted to several forms like nitrites, nitrates (easily absorbed by plants), ammonia and finally escape to the atmosphere again.

This brief illustration explains the NITROGEN CYCLE, and it is the only means by which plants and animals can use the highly unreactive nitrogen

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Germination is the process of seeds developing into new plants. First, environmental conditions must trigger the seed to grow. Usually, this is determined by how deep the seed is planted, water availability, and temperature. The water activates special proteins, called enzymes, that begin the process of seed growth.

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What do plant cells have for making food that animal cells do not
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