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Nesterboy [21]
3 years ago
11

What does the arrow mean in a food chain?

Biology
1 answer:
seraphim [82]3 years ago
5 0
The arrow indicates the movement of energy from one organism to another
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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
HELP QUIZ DUE TONIGHT!!!!!!!!!!!
denis23 [38]

Answer:

this is for the first image with the marshmallows in campfire-There are two main processes that heat a marshmallow: absorption of campfire radiation photons and contact with very hot air rising off the fire convection. If we place the marshmallow directly above the fire, we get both.

5 0
2 years ago
The mass of Jupiter, compared to the Earth, is approximately:
devlian [24]

Answer: The answer is 300,

Explanation:

Jupiter is somewhere around 318 times larger then the Earth.

5 0
2 years ago
(MARINE SCIENCE) Corals in tropical reefs have been shown to contain chemicals that are promising as treatments for
valina [46]

Answer:

Many organisms found on reefs produce chemical compounds that have been used in treatments for cardiovascular diseases, ulcers, leukemia, lymphoma, and skin cancer, and many more remain undiscovered.

Explanation:

hope this helps... but maybe not so sorry if im wrong :(

4 0
2 years ago
Which image shows a cell that has a higher concentration of salutes inside 1
Bumek [7]
The correct answer is hypertonic
3 0
2 years ago
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