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Morgarella [4.7K]
2 years ago
7

What are the pili used for?

Biology
1 answer:
rusak2 [61]2 years ago
4 0

Answer:

Pili are short, hair-like structures on the cell surface of prokaryotic cells. They can have a role in movement, but are more often involved in adherence to surfaces, which facilitates infection, and is a key virulence characteristic

Explanation:

please mark me as brainliest thank you

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Energy that is absorbed in the atmosphere
harkovskaia [24]

Answer:

I DONT KNOW UR QUESTION, HOPE THIS HELPS

1) About 23 percent of incoming solar energy is absorbed in the atmosphere by water vapor, dust, and ozone

2) Approximately 1.225 kg/m³

(<em>D</em><em>I</em><em>S</em><em>C</em><em>L</em><em>A</em><em>I</em><em>M</em><em>E</em><em>R</em><em>:</em><em> </em><em>It </em><em>c</em><em>hanges with variation in atmospheric pressure, temperature and humidity.</em><em>)</em>

3) The moon's gravitational pull on the Earth is the main cause of the rise and fall of ocean tides.

4) WIND

The uneven heating of the atmosphere causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

5 0
2 years ago
What organelle must be present for a cell to be classified as eukaryotic?
pychu [463]
Nucleus
Hope this helps *smiles*
6 0
3 years ago
Read 2 more answers
The medulla oblongs ya controls the contraction and relaxation of the blank causing the lungs to inflate and deflate during brea
Dmitry_Shevchenko [17]

Answer:

This question includes some errors, the question should be written as:

The medulla oblongata controls the contraction and relaxation of the ______ causing the lungs to inflate and deflate during breathing.

Although there are no options, the answer is generally RESPIRATORY MUSCLES i.e. diaphragm and intercostal muscles

Explanation:

Breathing is an involuntary action required to take place in order to get oxygen into the system and carbon dioxide out of the system. However, the process of breathing is neurally controlled by brain portion called RESPIRATORY CONTROL CENTERS.

The Medulla oblongata located in the hindbrain is one of the two respiratory control centers (the other being the PONS). The medulla sends nerve signals to the muscles responsible for bringing about the ventilation process i.e. the DIAPHRAGM and INTERCOSTAL MUSCLES.

This nerve impulse brings about the contraction of the diaphragm, which is the major respiratory muscle, and intercostal muscle causing the lungs to inflate and allow the entry of oxygen-containing air. On the other hand, it also brings about the relaxation of these muscles causing the lungs to deflate allowing the expelling of air.

4 0
2 years ago
1. What is a biogeochemical cycle?
Alla [95]

Answer:

1. In ecology and Earth science, a biogeochemical  cycle or substance turnover or cycling of substances is a pathway by which a chemical substance moves through biotic and abiotic compartments of Earth.

2. The sun, which drives the water cycle, heats water in the oceans. Some of it evaporates as vapor into the air. Rising vapor cools and condenses into clouds.

3. Heated by sunshine, the ground heats the air just above it. That warmed air starts to rise because, when warm, it is lighter and less dense than the air around it. As it rises, its pressure and temperature drop causing water vapor to condense. ... The air cools as it rises, and eventually clouds form.

Explanation:

4 0
2 years ago
A tyrosine kinase receptor is different from a G-protein linked receptor in that it can trigger
LenKa [72]

Answer:

a. more than one pathway at the same time.

Explanation:

Basically, RTK (receptor kinase receptor) principally activate many different transduction  pathways about 10 or more  and many cellular response in living cells.Thus,  its activates more than one signal transduction pathways at once, (compare to G-protein ), and with this mechanisms it aids in coordination of  some aspects of cell growth and cell reproduction .

6 0
3 years ago
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