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Natalka [10]
3 years ago
11

Lichens are among the slowest-growing organisms, but their tolerance of environmental extremes enables them to colonize habitats

where few other macroscopic organisms can grow. They grow where neither the fungal partner (mycobiont) or the photosynthetic partner (photobiont) could survive alone, because they benefit from their unique symbiotic association. What mutualistic behaviors aid in the survival of both organisms?
A) The photobiont processes and provides nitrogen and carbon products to the mycobiont.
B) The photobionts are protected and able to grow in conditions in which they could not grow alone and in return release glucose in some form to the mycobiont.
C) The photobionts absorb mineral nutrients from the underlying surface or from minute traces of atmospheric contaminants while the mycobionts synthesize organic nutrients from carbon dioxide.
D) The photobionts produce ammonium and organic sodium compounds from N2 gas by sodium fixation; that in turn, aids the mycobionts in producing enzymes to decompose the substrate on which they live.
Biology
2 answers:
bekas [8.4K]3 years ago
7 0

Answer:

The correct option is B.

Explanation:

Lichens  is regarded as a mutual relationship between a mycobiont and photobiont, the relationship is targeted at enhancing their survival in extreme environments. The mycobiont is a fungal while the photobiont is usually a green alga or a mycobacterium. Each of the organism has their specific tasks; the mycobiont provides suitable habitat for the photobiont while the photobiont provide energy for the whole system.

eimsori [14]3 years ago
3 0

Answer:

The photobionts are protected and able to grow in conditions in which they could not grow alone and in return release glucose in some form to the mycobiont

Explanation:

The mycobionts help retain moisture for the algae. The algae undergo photosynthesis to produce-carbon based compounds, such as glucose, which is shared with the fungus.

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d1i1m1o1n [39]

Answer: https://www.wwf.org.uk/learn/wildlife/polar-bears#:~:text=Challenges%20affecting%20polar%20bears&text=The%20Arctic%20is%20warming%20about,ice%20to%20raise%20their%20young.

https://www.carbonbrief.org/polar-bears-and-climate-change-what-does-the-science-say

Explanation:

3 0
3 years ago
Match the steps in the cell cycle in the correct order
Tcecarenko [31]

Answer:

1. Chromosomes line up - metaphase

2. Cell growth - G1

3. Final preparations for division - G2

4. Chromosomes get pulled apart - anaphase

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6. Chromosomes condense - prophase

7. Chromosomes uncoil and nucleus reforms - telophase

8. The cytoplasm and organelles divide, and now there are two identical cells - cytokinesis

Explanation:

There are four primary phases, or stages, in the cell cycle, which is a systematic process. Each stage has a goal that has to be achieved before moving on to the next. G1, S, G2, and mitosis are the stages.
There is growth during the G1 phase. A lot of protein is produced and water is pumped in, increasing the volume of the cell. The DNA is also examined at this time to see whether there has been any damage. The G1 phase precedes the S phase, therefore before going into S phase, the cell must make sure it has enough energy reserves.

The cell duplicates its DNA during the synthesis phase, also known as the S phase. DNA content doubles due to the duplication of all chromosomes. The compact state of DNA is created by proteins, which do not exist in and of themselves. Therefore, in order to ensure that the new DNA is properly packed when DNA is replicated, new packaging proteins must be produced. Histones are the proteins that house DNA. The production of new DNA is closely linked to the production of new histones.

A cell multiplies its organelles during the G2 phase. Right before the cells divide into two distinct cells during mitosis, the G2 phase occurs. There must be distinct functioning organelles in each daughter cell. Organelles like the golgi and endoplasmic reticulum are linked networks of sizable membrane pouches that may change size. Other organelles, including mitochondria and chloroplasts, are separate structures that must separate similarly to how cells do.

The process of physically dividing a cell into two daughter cells is called mitosis. Prophase, metaphase, anaphase, and telophase are its four basic stages. The nuclear membrane deteriorates as the chromosomes thicken during prophase. The center of the cell's chromosomes align during metaphase. One chromosome splits in half during anaphase, sending one half to either side. The telophase is characterized by the pinching together of the cell's centre to form two separate cells.

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SVETLANKA909090 [29]
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Arturiano [62]

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8 0
3 years ago
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Answer:

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Explanation:

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7 0
2 years ago
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