Evolutionary theories are supported by evidence of

1 answer:

3 0

A few example are
carbon/uranium dating
genetic variations
similar bone structure among vastly different species. For example: the great blue whale was 2 hip bones and 2 femurs!

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Having trouble biology

ira [324]

A. The Sex.
This is because of the last pair int he Karyotype. which is used to determine the sex of a human (XX or XY). In this case because there are 2 long chromosomes, this is a female (XX), but if there was one long and one short, that would be a male (XY). This can also be seen if the chromosome types are labeled like in this diagram. <span />

8 0

2 years ago

A pea plant that has round seeds has the genotype Rr. It is crossed with a pea plant that has wrinkled seeds and the genotype rr

Mariulka [41]

The correct answer is 50%, or 1/2. We know that round seeds are dominant, since the round pea plant has a genotype of Rr and the wrinkled pea plant has a genotype of rr. If it helps, draw a Punnett square with the two genotypes.

R r
r
r

The square works exactly like a coordinate grid. Combine the letters above and beside whichever of the four spaces you chose to find the genotype for that space.

R r
r Rr rr
r Rr rr

Therefore, 2 out of 4 of the pea plants have round seeds, since a genotype of Rr means that a plant will have round seeds, and 2 out of 4 will have wrinkled seeds, since a genotype of rr means that a plant will have wrinkled seeds. 2/4 simplifies to 1/2, or 50%. Therefore, there is a 50% chance that the offspring will have wrinkled seeds.

Hope this helps!

6 0

2 years ago

Match the following: 1. the continuous movement of water between the Earth's surface and the atmosphere lead 2. pollutes water s

Nat2105 [25]

Answer:

Explanation:

1. Hydrological cycle: the continuous movement of water between the Earth's surface and the atmosphere.

2. Industry: pollutes water sources by dumping wastes in rivers, streams, and oceans.

3. Sewage: the leading cause of water contamination in countries without water treatment plants.

4. Agriculture: a source of water pollution caused by the overuse of pesticides and fertilizers.

5. Eutrophication: caused by an overabundance of organic matter in water supplies.

6. Putrefaction: the decomposition of organic matter by microorganisms

7. Pesticides: a chemical pollutant that can enter the water cycle through agricultural or domestic use.

8. Petroleum: can cause the contamination of underground water supplies if poured on the ground

9. Lead: a metal that leaks into water supplies via the soil or aging water systems.

10. Humoral immunity: depends upon the production of disease-specific antibodies to destroy harmful bacteria.

11. Stimulants: increases the activity of the central nervous system.

12. Depressants: reduces the activity of the central nervous system.

13. Bacterial infection: caused by the reproduction of a small infectious agent, which produces poisons that destroy cells

3 0

2 years ago

WILL GIVE BRAINLIEST!!!

brilliants [131]

B. producer because most autotrophs are green plants use light for energy.

6 0

3 years ago

What were Punnett squares developed to do?

WITCHER [35]

Answer: to predict the probability of offspring genotypes

Explanation: Punnett squares are developed to predict the probability of offspring genotype. Punnett square is a square shaped diagram used for predicting the possible genotypes of a cross between two organisms. Punnett square is named after Reginald C. Punnett, who invented the approach. In punnett squares, the genotypes of the parents are written on the top and left hand side of the square while the possible genotypes of their offsprings are written in the boxes.

7 0

2 years ago