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Vikki [24]
2 years ago
10

According to the article,what valid claim came from the national research council?

Biology
2 answers:
zalisa [80]2 years ago
8 0
Answer: There is no link between fluoride exposure and increased cancer risk in humans.
tatuchka [14]2 years ago
7 0

Answer: There is no association between fluoride exposure and increased cancer risk in humans

Explanation: on edg.2020

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Different ratios occur in crosses with single gene pairs or two gene pairs. What types of ratios are likely to occur in crosses
likoan [24]

Answer:

Genotype ratio: 1, 1:1, 1:2:1

Phenotype ratio: 1, 3:1

Explanation:

Single gene pair cross is also known as monohybrid cross. This means that only one gene usually with two alleles is observed and it express one trait.

For example, if we name the gene for a certain trait with A, the possible genotypes are AA (dominant homozygous), aa (recessive homozygous) and Aa (heterozygous). Possible crosses are:

P: AA  x  AA

F1 : all of them are AA

The same is with aa x aa (all of the offspring are with aa genotype)

P: AA  x  Aa

F1: AA Aa AA Aa  (genotype ratio 1:1) (phenotype ratio 3:1)

The same genotype ratio is  in aa x Aa (offspring will have aa Aa aa Aa-(genotype ratio 1:1) (phenotype ratio 1:1)

P: Aa x Aa

F1: AA Aa Aa aa (genotype ratio 1:2:1) (phenotype ratio 3:1)

P: AA x aa

F1: Aa Aa Aa Aa (1)

5 0
3 years ago
What are the similarities between interspecific and intraspecific competitions?
Lerok [7]

Answer: If you break the two terms down, "intraspecific" just means within a species, while "interspecific" means between them. Consequently, interspecific competition is all about competition between two or more species, while intraspecific competition involves different individuals of the same species.

Great question

7 0
3 years ago
Which diagram correctly describes the changes that occur as a small piece of rock falls from space and hits the Earth?
umka21 [38]
The answer correct would be c

7 0
3 years ago
Read 2 more answers
Plants and animals are multicellular organisms made of organ systems that work together to maintain homeostasis. Body systems
Dmitry [639]
D) stem vascular and A
8 0
2 years ago
பட்ட
monitta

Answer:

Gametes

Explanation:

Gametes consist of sperm cells and egg cells...

8 0
3 years ago
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