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leva [86]
3 years ago
8

Define organelle and explain what it is

Biology
2 answers:
d1i1m1o1n [39]3 years ago
3 0
A little thing in a cell that helps out 
hammer [34]3 years ago
3 0
An organized or specialized structure within a cell.
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Ways of conserving soil fertility ​
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Deforestation effects soil quality and desertification will also effect the soils fertility. hope this helps :)

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3 years ago
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Cells within the body work independently of one another and rarely have direct effects on other cells. True or False
erastova [34]
That statement is false because cells work together
8 0
3 years ago
This is the state of body when opposing influences are balanced and the body remains unchanged
wolverine [178]

Explanation:

Physics The state of a body or physical system that is at rest or in constant and unchanging motion. The sum of all forces acting on a body that is in equilibrium is zero (because opposing forces balance each other).

5 0
3 years ago
The resistance to the pesticide in insects occurred because
Gemiola [76]

Answer:

The correct answer is option B. favorable change in DNA of the insect.

Explanation:

At the point when a pesticide is first utilized, a little extent of the pest population may survive to introduction to the material because of their particular hereditary or genetic makeup. These surviving individuals pass along the gene resistance to particular insecticide or pesticide to next generation.

Upon introduction to pesticides, insects that don't have the resistance die eventually, in this manner permitting the insects with the resistance genes to endure and reproduce,creates more resistance insects.

Thus, the correct answer is option B. favorable change in DNA of the insect.

8 0
3 years ago
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A number of marine reptiles and birds have salt glands, which have a remarkable ability to concentrate salt solutions for excret
Lemur [1.5K]

Answer:

A)100mL  B)50mL  C)The second option  D)Hypoosmotic Environment

Explanation:

The average Na concentration in the seas and oceans of the world is around 3,5% which mean that in 100 ml of sea water, there is around 3,5 grams of Na.

The weight of one mol of NaCl is 58,44 grams. For 3,5 grams of NaCl, we get 3,5/58,44 = 0,060 mol of NaCl which is 0,060x1000 = 60 mmol/100ml. According to this and the information given in the question about the secretion of the salt glands', if the average sodium concentration is 600mmol/L, we have 60*10 = 600mmol/L so it would take 100 mililiters of water to excrete.

If the average Na concentration of the salt gland's secretion were 300 mmol/L, only 50 mililiters of water would be needed to excrete the same sodium load.

The second option of secretion is hyperosmotic to seawater because the concentration is higher.

Osmoregulation is the process of balancing the amount of water and salt between the body of the organism and its surrounding environment. For salt glands to be advantageous for osmoregulation, they need to be in a hypoosmotic environment.

I hope this answer helps.

3 0
3 years ago
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