BIOLOGY HIGH SCHOOL

A dry soil sample has a volume of 500 mL. After 400 mL of water are added to the soil, the soil becomes saturated with150 mL of surface water left on top. What is the porosity of the soil?
O 30%
O 38%
O 50%
O 63%

Answers

Answer 1
Answer:

A dry soil sample has a volume of 500 mL. After 400 mL of water are added to the soil, the soil becomes saturated with 150 mL of surface water left on top. The porosity of the soil is 50%. Thus, option C is correct.

What is Forest soil?

Forest soil has more moisture than sandy soil therefore the types of plants that are grown in soil of forests are more qualitative and more superior than the sandy plants which are facing certain limitations and facing certain situations.

Forest soil supports plant life, but sandy soil does not support any plants. Forest soil produces more superior life and the plants life are found in the forest area and the sandy plants are lesser found in the sandy areas.

The reason for vegetation in forests is because of the supportive factors that are involved in the good plants life. The soil type that is the richest in organic material would be a dark-colored soil. Decaying matter turns brownish-black which makes this type of soil having a dark color even almost black.

Therefore, A dry soil sample has a volume of 500 mL. After 400 mL of water are added to the soil, the soil becomes saturated with 150 mL of surface water left on top. The porosity of the soil is 50%. Thus, option C is correct.

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Answer 2
Answer:

Answer:

answer is 50

Explanation:

i gess on quiz and it was correct

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the answer is bending a nail

In what ways is packaging an important use of energy and materials

Answers

Answer:

Packaging allows products/goods to be kept inside. The goods alone is what people need or want. Because of this, too much sophisticated packaging wastes energy and materials, so it can produce, distribute, dispose, and recycle it.

Answer:

the material you are using is a material being wasted

Explanation:

What are three task a meteorologist completes on most days

Answers

1. They observe how the ocean, atmosphere, and climate affect one another
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Hope this helps =]
Gather and interpret data, measure the temperature, humidity, pressure, wind speed, rainfall, and air, photograph and record data from satellites.

In cold climates, the amount of snow on the ground may decrease even if the temperature stays below zero degrees Celsius. The process that best explains this event isa. condensation.
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Answers

In cold climates, the amount of snow on the ground may decrease even if the temperature stays below zero degrees Celsius. The process that best explains this event is B. sublimation. 

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The variation of kernel color in corn plants is an inherited trait. R is the dominant allele for red kernels in a corn plant and r is the recessive allele for yellow kernels. What is the probability that a corn plant with the genotype Rr crossed with a corn plant rr will have offspring with the genotype rr? Express your answer as a fraction using numerals for numbers and / for the fraction bar. Do not include spaces.

Answers

The answer is 1/2.

If:
R - the dominant allele for red kernels
r - the recessive allele for yellow kernels

Then:
RR - dominant homozygote
Rr - heterozygote
rr - recessive homozygote

The cross Rr x rr will result in 1/2 of offspring with red kernels (Rr) and 1/2 of offspring with yellow kernels (rr):
Parental generation:      Rr      x      rr
Offspring generation:  Rr    Rr     rr      rr
So, there are 2 out of 4 Rr offspring (2/4 = 1/2) and 2 out of 4 rr offspring (2/4 = 1/2).

Answer:

1/2

Explanation:

Did the Study Island

What are two of the things human ancestors used the sky for?

Answers

Two things human ancestors used sky for

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  • Direction

What is the meaning of ancestor ?

An ancestor, also known as a forefather, fore-elder or a forebear, is a parent or the parent of an antecedent.

How do ancestors determine time ?

When two merkhets were aligned with the North Star, they formed a celestial meridian in the sky. The time could then be determined by counting how many stars crossed this line.

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They used the sky as a timing system to tell the time because back then they didnt have watches. In the slavery times, the slaves used the starts to tell which way was north and south to get to freedom.
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