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rjkz [21]
3 years ago
6

A farmer observed that an increase in the nitrogen content of the soil in a field was followed by an increase in producer produc

tivity. What does this observation most likely indicate about the relationship between nitrogen and the producers in the field?
1Points
A
Nitrogen was a biotic factor.

B
Nitrogen was a limiting factor.

C
Nitrogen became a surplus resource.

D
Nitrogen became a selection pressure.
Biology
1 answer:
Gekata [30.6K]3 years ago
8 0

Answer:

Nitrogen was a limiting factor

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Explanation:

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When vesicles of the cardiac sarcoplasmic reticulum (CSR) are incubated with ATP Mg^2+ and Ca^2+, they take up Ca^2+ and reach a
abruzzese [7]

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I added 4 and 5 as an attachment due to time constraint.

Explanation:

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when we convert this we get

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surface area =4x3.14x(75x10⁻⁹)²

= 12.56x5.625⁻¹⁵

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this is 7.065x10⁻¹⁰cm²

3. number of vesicle/CSR

= 5x10⁻⁶/1.77x10⁻¹⁸

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8 0
3 years ago
Which of these statements about trophoblast is false?
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The statement C that says ''is derived from the inner cell mass'' is false.

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The trophoblast provides nutritive molecules to the developing embryo and facilitates its implantation to the uterine wall due to its ability to erode the tissues of the uterus, that is, it is responsible for making it possible for the embryo to be implanted in the uterine endometrium. Thus, the blast can join the cavity formed by the uterine wall, where it will absorb nutrients from the fluid from the mother.

During the third week, embryonic development includes the development of the trophoblast. At the beginning, the primary villi are formed by the internal cytotrophoblast which is surrounded by the outer layer of syncytiotrophoblast. Then, the cells found in the embryonic mesoderm are directed to the primary villous in the third week of gestation and when it ends, the mesodermal cells begin to be singled out to form blood vessel cells.

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