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2 years ago

Identify all of the different observations used to support harry hess' theory of seafloor spreading.

1 answer:

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In the 1960s Hess proposed that the crust separates along the rifts in the mid ocean ridges and that new seafloor forms by upwelling of hot new crust into these cracks. Magnetic anomaly patterns on the sea floor provide evidence. They are peculiar banded magnetic patterns found on the sea floor. By using the age of magnetic reversals they could calculate the rate of seafloor spreading using the equation speed=distance/time. Another line of evidence is the fact that rocks closest to the spreading ridge are younger and older rocks are further away. <span />

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Human ABO blood type is controlled by the I locus and has three possible alleles. The alleles which code for type A blood (IA) a

Oxana [17]

Answer:

1/8 (12.5 %)

Explanation:

Cross: IAi X IAIB

F1: 1/4 IAIA 1/4 IAIB 1/4 IAi 1/4 IBi

Phenotypes:

- IAIA and IAi >> type A blood

- IBi >> type B blood

- IAIB >> type AB blood

Phenotypic frequency type A blood: 1/2 (i.e., 1/4 IAIA + 1/4 IAi) >>

Probability to have 3 offspring with type A blood: 1/2 x 1/2 x 1/2 = 1/8

The human ABO blood group is a system consisting of there different alleles: A, B, and O. This system is used in genetics as an example of codominance because both A and B alleles are expressed in heterozygous individuals (i.e., IAIB), whereas only the allele A is expressed in individuals that have A and O alleles (since O allele is recessive to the A and B alleles).

6 0

3 years ago

Which process results in two daughter cells each having the same number of chromosomes as the parent cell?

Allisa [31]

DONT CLICK D!! i just took it and it was mitosis!!!! B is the correct answer!!!!!!!!!

5 0

2 years ago

Read 2 more answers

NEED ASAP! How does the amount of food in a meal effect the time it takes to digest

Alona [7]

Answer:

because the items in a meal are all different and digest differently

5 0

2 years ago

Select all that apply.

kvasek [131]

Its a sex linked disorder and it makes stopping the bleeding slower in affected individuals.

<h3><u>Explanation:</u></h3>

Hemophilia is a sex linked recessive disorder which occurs due to a gene present in the X chromosome. The presence of this gene in males surely make the individual hemophilic because the Y chromosome doesn't contain any dominant factor of this gene. In females, the recessive individuals become carriers without expression of this gene. Only the dominant individuals in females expresses Hemophilia.

Its a disease where the Christmas factor (Factor IX) or the antihemophilic factor(Factor VIII) is absent in the affected individual. This makes the cascade theory incomplete and there's a defect in blood clotting in both the intrinsic and extrinsic pathways. Thus the persons if starts bleeding, loses a lot of blood before coming to a stability.

5 0

2 years ago

Read 2 more answers

Which part of the nervous system is made up of cells that send and receive tiny electrical charges?

Hoochie [10]

Answer:

Neurons

Explanation:

Neurons are specialized cells, found in the nervous system, which transmit information.

Neurons contain a dendrite, a soma, and an axon. Some axons are covered with a fatty substance known as the myelin sheath, which surrounds the axon, acting as an insulator and allowing faster transmission of the electrical signal.

I used this site, please read it over whenever you are free.

https://opentextbc.ca/introductiontopsychology/chapter/3-1-the-neuron-is-the-building-block-of-the-nervous-system/#:~:text=Neurons%20are%20specialized%20cells%2C%20found,transmission%20of%20the%20electrical%20signal.

8 0

2 years ago