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borishaifa [10]
3 years ago
11

Over the past 60 years, the level of carbon dioxide in the atmosphere has been continually increasing. Many scientists hypothesi

ze that this increase has led to an imbalance in the carbon cycle and a climatic trend known as global warming.
In which of the following ways could humans help the carbon cycle return to normal?

A.)reduce the amount of fossil fuels they combust
B.)cap volcanoes so that they do not release more carbon dioxide
C.)pump nitrogen and oxygen into the air to help rebalance the atmosphere
D.)cut down trees and other large plants that depend on carbon dioxide
Biology
2 answers:
padilas [110]3 years ago
7 0
A is the awnser i hope

Shkiper50 [21]3 years ago
3 0

Answer:

Not A it be  D.  reduce the amount of fossil fuels they combust

Explanation:

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A researcher has developed two stains for use with seed plants. One stains sporophyte tissue blue; the other stains gametophyte
sukhopar [10]

Answer:

A) The pollen grains will be pure red.

Explanation:

Plants have alternation of generations, this means that there are two different stages in their life-cycle: a sexual haploid (n) phase and an asexual diploid phase (2n). These phases occur in different individuals, so there is an haploid plant called gametophyte that carries gametes and after fecundation, it will rise a diploid sporophyte (asexual).  

In seed plants, the sporophyte is the plant that we normally see, and the gametophyte is reduced into an organ of the sporophyte. The male gametophyte is the pollen that is produced in the sporangium in anthers (parts of sporophyte).  When a pollen grain fecundes a female gametophyte (egg), it will produce a diploid embryo or new sporophyte.

Therefore, if the researcher exposes pollen to both stains, these grain will stain red, because red stain identifies gametophyte tissue.

3 0
3 years ago
A sample of soil from a C horizon is light brown in color and has a high content of a mineral called feldspar. Which of the foll
vaieri [72.5K]

Answer: C. The C horizon is very deep.

Horizons are the layers of soil develops as a result of soil formation. Horizon lies parallel to the earth surface. Each horizon differs from the other on the basis of amount or organic matter present, color of the soil, texture of soil and other components making up horizon, and amount and type of minerals present in the soil.

C horizon is the horizon that lies deeper region of the collective soil horizon. It consist of unweathered or partially weathered rocks or their aggregates. Therefore, it retains the original chemical composition of the parent rock. This results in the higher mineral content as compared to other horizons. This horizon also lacks the organic matter as no or very little decomposition activity of plant and animal matter takes place. Therefore, color of soil in this horizon in the absence of organic matter remains light.

Hence, a sample of soil from a C horizon is light brown in color and has a high content of a mineral called feldspar is because of the fact that the C horizon is very deep.


8 0
3 years ago
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The aorta receives the full force of blood exiting the heart during ventricular systole. Describes the adaptive anatomy of the a
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<h2>Anatomy of Aorta</h2>

Explanation:

  • The protein elastin is found in connective tissues all through the body. It is eminently found in the extracellular lattice of the skin just as the inward organs of the body. The name elastin sounds a lot of like 'flexible.' This is no fortuitous event. The elastin protein is adaptable and gives numerous tissues their versatility.
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3 years ago
What kind of molecule is oil?
Ann [662]
Lipids is the answer
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3 years ago
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Ill give you a brainliest if it is right
joja [24]
I believe it might be C
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