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2 years ago

PLEASE HELP IM BEGGING YOU

Biology

2 answers:

Virty [35]2 years ago

5 0

Looks as if the plate faults, with them rubbing against each other and always moving, mountains are created by plates joining together and going upward for them no where to go.

charle [14.2K]2 years ago

3 0

That is true.

Tectonic plates (a.k.a. lithospheric plates) are huge, oddly irregular in size, pieces of solid rock. Tectonic plates are the hard shell keeping us from getting burned by hot lava churning inside our earth. There are 2 different kinds of crust, both oceanic crust, and continental crust. Oceanic crust is made of tectonic plates underneath the ocean waters; these are denser and not as thick as the continental crust, to keep the water from the outer core of the earth. Continental crust is opposite, less dense and thicker to support the great quantities of rock, the continents.

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Questions:

Neporo4naja [7]

Explanation:

1. cell membranes are partialy permeable, only allowing passage to some certain molecules.

2. diffusion is the movement of molecules across partially permeable membrane down concentration gradient.

3. the molecules are too big to pass through partially permeable membrane. the concentration of the molecule might be higher in the cell than in the solution/surroundings.

7 0

3 years ago

Which is the word equation for photosynthesis?

Fudgin [204]

It is the third option
Carbon dioxide (CO2) + Water (H20) produces Glucose (C6H12O6) and Oxygen (O2)

4 0

3 years ago

True or false? if you used a radioactive label to trace the pathway of carbon through cell respiration, the label would begin in

Lorico [155]

If you used a radioactive label to trace the pathway of carbon through cell respiration, the label would begin in glucose and en in co2. TRUE

6 0

3 years ago

A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of

julsineya [31]

Answer:

- 100 grams of food A (x)

- 60 grams of food B (y)

Explanation:

According to this question, the group of laboratory rats are being fed a daily diet of:

- 125.6 units of niacin and 5,400 units of retinol

Let x represent the number of grams needed for food A.

Let y represent the number of grams needed for food B.

This means that:

Food A: Niacin = 0.86x, Retinol = 30x

Food B: Niacin = 0.66y, Retinol = 40y

Since there are 125.6 units of niacin fed to the rats in total, then;

0.86x (A) + 0.66y (B) = 125.6

Since there are 5400 units of retinol fed to the rats in total, then;

30x (A) + 40y (B) = 5400

Solving these two equations simultaneously using elimination method:

0.86x (A) + 0.66y (B) = 125.6 ........(eqn 1)

30x (A) + 40y (B) = 5400 ............ (eqn 2)

Multiply eqn 1 by 30 and eqn 2 by 0.86

30 × 0.86x + 0.66y = 125.6

0.86 × 30x + 40y = 5400

25.8x + 19.8y = 3768 ............ (eqn 3)

25.8x + 34.4y = 4644 ........... (eqn 4)

Subtract eqn 3 from eqn 4

14.6y = 876

Divide both sides by 14.6

y = 876/14.6

y = 60

Substitute value for y (60) into eqn 2

30x + 40y = 5400

30x + 40(60) = 5400

30x + 2400 = 5400

30x = 5400 - 2400

30x = 3000

x = 3000/30

x = 100

Therefore, she feeds the group of rats 100grams of food A (x) and 60 grams of food B (y).

4 0

3 years ago

Why might asexual reproduction typically result in local colonization, while the products of sexual reproduction are typically d

Lelu [443]

Answer:

(A) The variation resulting from meiosis and the union of gametes means some individuals will have a chance of colonizing diverse distant environments successfully.

(D) Vegetative propagation is more efficient than sexual reproduction when the current generation is well adapted to the local environment.

Explanation:

Sexual or asexual (options B and C) are not a "last ditch", it pretty much depends on the type of organism and its strategy for survival. There are thousands of organisms that can reproduce either sexually or asexually depending on the environmental conditions.

Option A. Genetic variability is important because sometimes the genetic variability produce during the sexual reproduction processes (crossing over, chromosomes assortment and DNA from 2 parents) can confer an organism the adaptability mechanism to thrive in different environments.

Option D. Since asexual reproduction delivers genetical equal organisms, the offspring is already adapted to local conditions and can colonize at a faster rate.

8 0

3 years ago