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Virty [35]
3 years ago
8

Give a working definition of alien invasive species

Biology
1 answer:
konstantin123 [22]3 years ago
6 0
A species that is not native to an ecosystem but is introduced artificially. Usually cause harm to the native species in the area.
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IN NEED OF HELP PLEASE!
denis-greek [22]

Answer: road pipeline

Explanation:

7 0
3 years ago
Which process moves an ion across a cell membrane against the concentration gradient?
Aleonysh [2.5K]

Answer:

Active Transport

Explanation: it is the movement of dissolved molecules into or out of a cell through the cell membrane.

Hope this helps

Plz give me Brainliest.

5 0
2 years ago
The stomata you view on the surface of the leaves are used in gas exchange and the guard cells regulate this exchange. What do y
beks73 [17]

Answer:

They will collapse and shut off the stomatal pore

Explanation:

The guard cells are regulated by the presence of water. When water is present, they become turgid and open up the stomatal pore and when water is inadequate, they become flaccid, collapse and close up the stomatal pore as a result.

<em>If the leaf is left under the microscope for too long, there will be loss of water by evapotranspiration and the guard cell will become flaccid and collapse as a result and the stomatal pore will become closed.</em>

8 0
3 years ago
Which of the following situations does diffusion not help, in our bodies?A. Oxygen entering the bloodstream.B. Food entering the
lubasha [3.4K]

Answer:

Glucose entering the intestines from the villus.This is by active transport.The latter is defined as the movement of molecules and  solutes from the region of lower concentration to the region of higher concentration against the concentration gradient.

Explanation:

All the above options depends on the diffusion gradients from one  higher region to another.e.g oxygen passing from high concentration from outside to lower concentration in blood stream,like wise Co2 from higher concentration from inside to outside,with passive diffusion lipids and water enter the small intestine(note amino acid and glucose,and fructose are different).

Active transport( through sodium dependent transporter) transports glucose to the intestine  from the villus.This is movements against concentration gradient because,glucose molecule are concentrated in intestine,and needed by the cells, in the body.Therefore they must be transported as a fast rate inn the blood .

However the absorption by the villi is very slow,therefore active transport is needed to move these against the concentration gradient into the intestine.And finally the blood.

If this were to be moved by  passive diffusion,the high concentration in the intestine will force this back into the villi

Therefore extra energy is needed by active transport for the glucose molecules to enter the intestine from the villus.

6 0
3 years ago
Why are fungi and plant placed in separate kingdom
VARVARA [1.3K]
Because fungi dont live off of sunlight the are under the class of decomposes which means that they grow off of dead things getting nutrients from that
4 0
3 years ago
Read 2 more answers
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