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Rama09 [41]
2 years ago
12

NEED HELP!!!

Biology
1 answer:
Thepotemich [5.8K]2 years ago
7 0
A. Mass extinction is the answer
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Question 4
Juliette [100K]

Answer:

In eukaryotes, thousands of chemical reactions are able to take place in  separate compartments called organelles.

Explanation:

Organelles are specific cellular structures that are the means of compartmentalizing the various functions that occur within cells.

Examples of organelles and their functions are:

- <u>Nucleus</u>: contains DNA and in it occur the replication of this molecule and its transcription into RNA.

- <u>Rough endoplasmic reticulum</u>: protein synthesis and conjugation of these molecules occurs.

- <u>Mitochondrion</u>: houses all oxidative phosphorylation reactions and the electron transport chain for ATP synthesis to occur.

The organelles are then the structures that allow the development of the multiple functions that a cell has.

The other options are not correct because:

  • <em><u>Bacteria</u></em><em> is a prokaryotic organism. </em>
  • <em><u>Prokaryote</u></em><em> refers to simple organisms that lack organelles. </em>
  • <em><u>Proteins</u></em><em> are biomolecules that allow the structure and function of living beings.</em>
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2 years ago
Acid rain is formed when certain molecules, such as sulfur dioxide (SO2), react in the atmosphere to form acids. How does most S
nekit [7.7K]
C. It is a byproduct of coal combustion. 
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3 years ago
During periods of high solar activity, huge cloudlike structures that appear as great arches extending from the sun are often pr
aleksandr82 [10.1K]
Solar features are called prominences 
6 0
3 years ago
Structure: Which of the following best describes the arrangement of the sides of the
mars1129 [50]

Answer:

Alternating

Explanation:

the arrangement of the sides of the

DNA molecule bonding is Alternating

6 0
3 years ago
Phytoplankton form the base of food webs, but are only present in the upper few hundred meters of the ocean. A number of factors
Ksenya-84 [330]

Answer:

The correct answer is d. Oxygen

Explanation:

Phytoplanktons are responsible for the fixation of approximately half of the global carbon therefore seawater has high CO2 concentration which is required by phytoplanktons to make their food.  

They are the primary producers of oceans and they are responsible to support the food chain of oceans. Factors that can limit their growth are mainly sunlight and nutrients like phosphorus, nitrogen, etc.

As phytoplanktons are photosynthetic they release oxygen itself as a byproduct therefore oxygen is not a limiting factor to phytoplanktons. So the right answer is d.

6 0
3 years ago
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