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kompoz [17]
3 years ago
9

What is the primary source of energy for food chains in an ecosystem

Biology
2 answers:
anygoal [31]3 years ago
7 0
It is the sun. You start with photosynthesis.
Mademuasel [1]3 years ago
5 0

Answer:

the sun, I just took the test

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Gregor Mendel crossed true-breeding plants with green pea pods with true-breeding plants with yellow pea pods. The resulting F1
Alchen [17]

Answer:

A. Mendel observed green and yellow pea pods in a 3:1 ratio because the F1 generation was heterozygous.

Explanation:

The two true breeding plants in the parental population were homozygous (that is what true breeding means). Therefore, their cross would lead to all heterozygous offspring (see attached punnet square). Green is the dominant characteristic, so all F1 plants had a green phenotype, but Gg genotype.

The F1 cross would therefore be Gg x Gg. See attached punnet square.

The genotypes in the F2 generation are 1 GG: 2 Gg: 1 gg 1

Therefore, the phenotypic ratio is 3 green pea pods (Gg or GG): 1 yellow (gg)

Download pdf
4 0
3 years ago
Through which of the following body parts do humans take in the energy they need to survive? . A - mouth . B - intestines. C - s
Eddi Din [679]
Nutrients and energy from the food (as well as water) we eat are absorbed in the intestines.
5 0
3 years ago
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How can the mass of an object be determined in a laboratory?
Murrr4er [49]

The object is balanced against standard units of mass

5 0
3 years ago
By age 65, what percentage of adults are grandparents? 75 80 85 90
frutty [35]
85% of adults are grandparents by age 65. This estimation has been made in the U.S. from the surveying of the elderly. So, the correct choice is the third option: 85. 

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7 0
3 years ago
The first nine weeks of development about 11 week total a developing human is referred to as an embryo from nine weeks until tim
LiRa [457]

Answer:

fetus

Explanation:

During the gestational period the developing human is referred to as fetus.

8 0
4 years ago
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