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Elden [556K]
2 years ago
13

How do molecules like O2, CO2, and small hydrophobic molecules cross cell membranes?

Biology
1 answer:
ExtremeBDS [4]2 years ago
3 0

Answer:   Simple Diffusion Across the Cell (Plasma) Membrane

Explanation:

 pretty much the structure of the lipid bilayer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down their concentration gradient, by simple diffusion.

HOPE THIS HELPS!!

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Plz help
Travka [436]

Answer:

It get its energy from an organism that is decaying or decomposing

Explanation:

Fungi get energy from an organism that is decaying or decomposing

3 0
3 years ago
Read 2 more answers
What are these structures stop blood flowing backwards into the atria.
wel

Answer:Valves stop blood flowing backwards

Explanation: Valve are flags of tissue that control the direction of the blood in our heart.,it prevent the backwards flow of blood. valves regulate blood from flowing back into the atria.The right and left atrio-ventricular valves prevent blood from flowing backwards into atria. When the ventricle is full,the valve prevent backwards flow of blood.

6 0
4 years ago
What are some negative effects humans have on wetlands?
saw5 [17]
Wetlands are often drained in many regions to facilitate human use of the land. This happens a lot within the Pairie Provinces of Canada, where wetlands are drained to make way for agriculture. Wetlands are also often drained so as to use the land for building houses. Humans have also altered the flow of rivers through constructing dams and over-abstracting water. In many regions, depressions that would have been flooded in the past to form wetlands are no longer saturated. Wetlands also act as a 'sink' for many pollutants, and much of the pollution released into upstream rivers by humans may settle into the relatively stagnant waters of wetlands, to be absorbed into the sediments, where often it acts as a chronic pollutant, negatively effecting the aquatic ecosystem and water quality downstream. 
4 0
3 years ago
Which of these is a producer?
Svetradugi [14.3K]

Answer:

Plants sre the producers.

Explanation:

5 0
4 years ago
Read 2 more answers
Suppose that in​ 2008, 819,450 citizens died of a certain disease. Assuming the population of the country is 250 ​million, what
Goshia [24]

Answer:

The correct answer is 327.78.

Explanation:

A mortality rate refers to the determination of the rate of the occurrences of deaths in a given population in the course of a particular time period. The formula for finding the mortality rate is:  

Deaths taking place in a given time duration / the size of the populace among which the deaths have taken place × 10ⁿ

The given population of the country is 250 million

The number of individuals died due to a certain disease is 819450

Thus, the mortality rate per 100000 can be calculated as:  

819450 / 250000000 × 100000 = 327.78 deaths per 100,000 people.  

8 0
3 years ago
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