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babunello [35]
3 years ago
12

Substances that are poisonous are

Biology
1 answer:
3241004551 [841]3 years ago
8 0
D. Toxic , the other options do not refer to something necessarily harmful to the human body or poisonous. Human hair is ignitable, acid in the stomach corrodes food through chemical reactions so toxic is the only option left.
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The concentration of molecules or ions in a particular area as compared to another area is referred to as the concentration
Klio2033 [76]

Answer:

Concentration gradient

Explanation:

When the concentration of molecules and ions is compared to the concentration of ions and molecules in another area, the difference in the concentration will be called the concentration gradient.

The concentration gradient is the factor which determines the rate and direction of the molecules and ions in the environment which could be physical or biological.  

Thus, concentration gradient is the correct answer.

8 0
4 years ago
In genetic complementation testing, crosses are performed between pure-breeding strains for recessive mutations that confer the
Advocard [28]

Answer:

All of the F1 progeny would be wild-type.

If the two mutations are in different genes, then we expect complementation to occur (each mutant strain provides a functional copy of the gene that is defective in the other strain) and wild-type progeny to be produced

8 0
3 years ago
Which force requires contact?
frozen [14]
C. Is the answer to that question
4 0
4 years ago
During ______, the gravitational forces of the sun and moon pull on the Earth from the same direction, or opposite dire
STatiana [176]

Answer:

Spring Tides.

Explanation:

Tides can be defined as the rise and fall of water level in water bodies such as lakes and oceans due to the gravitational force of attraction exerted by the moon on earth. The side closest to the moon creates a bulge of water known as high tide. Low tides are generally experienced when a sea level is not within the bulge.

Generally, the gravitational pull of the Moon cause visible changes on planet Earth's surface.

This ultimately implies that, the pull of the Moon's gravity causes high and low tides on planet Earth's surface.

The various types of ocean tides based on the position of the Earth, Moon and the Sun are;

I. Neap tides.

II. Spring tides.

III. Low tide.

IV. High tide.

V. Brown tide.

VI. Rip tide.

VII. Red tide.

7 0
3 years ago
What happens if one part of an ecosystem in damaged or destroyed?
Westkost [7]

hello there

the answer is

If all the decomposers in an ecosystem were destroyed then the ecosystem would all apart.

This is because they give the nutrientsback to the soil in order for new organisms to grow.

thank you

4 0
3 years ago
Read 2 more answers
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