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umka21 [38]
2 years ago
7

What is the main function of a selectively

Biology
2 answers:
WARRIOR [948]2 years ago
8 0
The answer is C, the membrane is in charge of what enters and leaves the cell
m_a_m_a [10]2 years ago
7 0
Regulates what enters and leaves the cell
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​oscar is 75 years old. his doctor has encouraged him to walk briskly each day in order to maintain or improve his cognitive per
allochka39001 [22]

Answer:

he might be rinning the marithon and may not have been in shape

Explanation:

3 0
3 years ago
HELP! Solar, biomass, geothermal, wind, and hydropower energy are all renewable sources of energy. They are called renewable bec
bazaltina [42]

Answer:

C. Can be replenished by nature in a short period of time

Explanation:

Renewable, as a word, means that it is able to be replaced again. Renewable energy is energy that is able to be replaced quickly, and will never run out. Solar, biomass, geothermal, wind, and hydropower energy all can be reproduced again without the risk of running out, unlike fossil fuels.

Hope this helps!

Panna

7 0
3 years ago
Read 2 more answers
Write a summary about the cell theory
julia-pushkina [17]

Answer:

Over the next two centuries after the discoveries of Hooke and Leeuwenhoek, biologists found cells everywhere. Biologists in the early part of the 19th century suggested that all living things were made of cells, but the role of cells as the primary building block of life was not discovered until 1839 when two German scientists, Theodor Schwann, a zoologist, and Matthias Jakob Schleiden, a botanist, suggested that cells were the basic unit of structure and function of all living things. Later, in 1858, the German doctor Rudolf Virchow observed that cells divide to produce more cells. He proposed that all cells arise only from other cells. The collective observations of all three scientists form the Cell Theory, which states that:

all organisms are made up of one or more cells,

all the life functions of an organism occur within cells,

all cells come from preexisting cells.

Though no one point of the Cell Theory is more important than another, the theory clearly states that the functions necessary for life occur in the cell. Findings since the time of the original Cell Theory have enabled scientists to "modernize" the theory, including points related to biochemistry and molecular biology. The modern version of the Cell Theory includes:

all known living things are made up of one or more cells,

all living cells arise from pre-existing cells by division,

the cell is the fundamental unit of structure and function in all living organisms,

the activity of an organism depends on the total activity of independent cells,

energy flow (metabolism and biochemistry) occurs within cells,

cells contain hereditary information (DNA) which is passed from cell to cell during cell division,

all cells are basically the same in chemical composition in organisms of similar species.

The Cell Theory is one of the main principles of biology. The points of the theory have been found to be true for all life. As with any scientific theory, the Cell Theory is based on observations that over many years upheld the basic conclusions of Schwann’s 1839 paper. However, one of Schwann’s original conclusions stated that cells formed in a similar way to crystals. This observation, which refers to spontaneous generation of life, was discounted when Virchow proposed that all cells arise only from other cells. The Cell Theory has withstood intense examination of cells by modern powerful microscopes and other instruments. Scientists continue to use new techniques and equipment to look into cells to discover additional explanations for how they work.

Explanation:

Hope I helped!

4 0
2 years ago
Read 2 more answers
The exhaustion stage of stress comes from the ___________ cycle.
devlian [24]

Answer: alarm and resistance

The exhaustion stage of stress originates from <span>the first two stages of the cycle of stress,  the alarm resistance. tress,  </span>and<span>Once alarm ( where the body system is flooded with adrenaline)  is ended, resistance sets in and finally, exhaustion takes over when the body runs out of energy.</span>

3 0
2 years ago
Suppose you’ve been asked to design a study about this town. You want to know how their efforts have affected climate change. Wh
timurjin [86]

Answer:

Measure CO2 Levels from around the town to see if the ratio of Oxygen to CO2 is irregular. It's also important to take in factor how much CO2 intake the plantation around them is so you can see what the entire amount is.

Explanation:

8 0
2 years ago
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