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shusha [124]
3 years ago
5

the precambrian era begins with a) the first prokaryotic cells forming.  b) the appearance of animals with shells. c) the format

ion of the earth.
Biology
1 answer:
Airida [17]3 years ago
5 0
I think it is A 


hope this helps 
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Which of the following organisms is made of the most complex
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Answer: A. Plant

Explanation:

Plants have some of the most of complex cells of living organisms because they have different roles and structures to enable the plant to survive.

These include cells like the Parenchyma, Collenchyma, Sclerenchyma, Xylem and Phloem cells. Xylem cells for instance are complex cells located within the vascular tissues of plants and help transport water and minerals to the rest of the plant from the roots. Xylem cells look long and tracheal which is to enable them carry out the aforementioned roles.  

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2 years ago
What do you think an AIR QUALITY ALERT is??​
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Answer:

It discusses Pollution levels in the Air

Explanation: Air can be hazardous to those lungs that are weak. They have something called an Air Quality Alert to warn those with weak lungs to take precautions. Hope this helped!

6 0
3 years ago
The actual niche the organism is able to occupy in the presence of competitors is called its:_____________.
ladessa [460]

Answer:

B) realized niche

Explanation:  

The ecological niche refers to all the environmental factors that influence the growth, survival, and reproduction of species. These factors also include the interaction between species. The term ecological niche refers to the fundamental niche or the realized niche.    

  • The fundamental niche refers<u> only</u> to factors or physical conditions under which a species can live and survive in the <u>absence of any interaction with other species. </u>
  • The realized niche refers to the restricted conditions in which a species can live and survive as a result of <u>environmental conditions and the interaction with other species</u><u>. </u>

When an inferior competitor is excluded by the superior competitor, this is known as competitive exclusion. This occurs when there is not habitat differentiation, and both species can not share the same niche. In this case, the effective or realized niche of the dominant species completely occupies the fundamental niche of the inferior competitor.        

 In the exposed example the organism is able to occupy a niche in the presence of competitors, which is the clue for us to classify this niche as a realized niche. The organism needs to interact in a certain way with its competitors. There is an interaction between taxonomic groups, or between individuals.

6 0
3 years ago
In the ecological pyramid organism A represents
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Answer:

photosynthetic organisms

Explanation:

These are autotrophs organisms that use carbon dioxide and water, and with the help of solar energy, they produce nutritive material and release oxygen.

This is known as the process of photosynthesis and it is done in the organs of the plants that contain chloroplasts.

7 0
3 years ago
The circulating red blood cell is metabolically active but is only able to live for 120 days. During this short time, some signi
OLEGan [10]

Answer: They lack nucleus and other organelles important for the synthesis of the enzyme.

Explanation:

The main function of the red blood cells is to supply oxygen throughout the body. The oxygen binds to the hemoglobin and travels throughout the body to ensure the supply of oxygen to various organs and more precisely the cells of the body.

The enzymes that is being synthesized inside the body is produced by the help of the gene and nucleus along with the other organelles involved in it.The mature red blood cells lack nucleus in order to increase the surface area for carrying the oxygen.

As there is no nucleus, mitochondria and golgi apparatus in the cell, there is no enzyme synthesis and broke down in the cell.

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3 years ago
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