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Ivenika [448]
3 years ago
11

_____________________ are the first organisms to colonize an area and begin the process of ecological

Biology
1 answer:
Luba_88 [7]3 years ago
5 0

Answer:

4.

Explanation:

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Most grasses of the prairies
olga nikolaevna [1]
Are bunchgrass because they form a kind of ecosystem within the prairie.
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What human activities affect the water, carbon, and the nitrogen cycle what are the consequences
Mademuasel [1]
The nitrogen cycle is impacted by humanswhenever fertilizer is applied to farmland to help crops grow. This adds nitrates to the soil. If soil erodes, the nitrates are transported and deposited in the nearest body of water. This can cause algae to overgrow in a process called eutrophication. The lake will run out of oxygen as the algae die off and bacteria begin their decomposition.Sessile organisms are greatly affected. 
8 0
3 years ago
The epithelial cells in the skin of an animal have 24 chromosomes. How many chromosomes are present in the gametes of this anima
mrs_skeptik [129]

Answer:

There will be 12 chromosomes

Explanation:

We have given that The epithelial cells in the skin of an animal have 24 chromosomes

We have to find the number of chromosomes present in the gametes of this animal

We know that number of chromosomes present in the gametes is given by

\frac{number\ of\ chromosmes\ present\ in\ skin}{2}

So number of chromosomes in gametes =\frac{24}{2}=12chromosomes

4 0
3 years ago
Read 2 more answers
The glucose transporter used by cells to obtain glucose from the media is a protein embedded in the membrane. When researchers f
jeka57 [31]

Answer:

a. It's a carrier protein doing facillitated diffusion

Explanation:

Facilitated diffusion may be defined as the transportation of molecules from a high concentration to a low concentration that is down the concentration gradient without input of the energy. Whereas the active transport is transportation of the molecules from the low concentration to the high concentration which is against concentration gradient by the membrane protein.

The glucose transportation process requires membrane protein for the transport and does not require any energy. Therefore, it is carrier protein which is doing the facilitated diffusion.

3 0
3 years ago
True or false: In a gel electrophoresis gel, a DNA fragment containing 100 bp (base pairs) would travel faster (and further) tha
vova2212 [387]

Answer: true

Explanation: In gel electrophoresis, the smaller the size/molecular weight of DNA the faster it moves across the gel and vise versa. This is as a result of the pore size of the gel which is usually prepared 1g of agarose in 100ml of distilled water. So a DNA fragment with 1000 base pairs will "struggle" its movement across the gel pore making it mive less faster and further. Movement and molecular weight of DNA are inversely proportional.

3 0
3 years ago
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