BIOLOGY HIGH SCHOOL

Given the nucleotide sequences below, what type of mutation has occurred?Before:

A C C G T A T G T C A T

After:

A C C G T A A G T C A T



deletion


insertion


substitution


mixer

Answers

Answer 1
Answer: Answer: Substitution

Reasoning: In the DNA strand, we have taken a letter out and put in another letter to see what happens. This method is called substitution, when we take something out, and put a new piece in. 

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Suppose scientists could compare the DNA of modern humans from around the world with the DNA of Homo erectus populations from the humans’ native homelands. If DNA samples from each modern human were found to be most similar to the Homo erectus DNA from their homeland, that finding would__________________. a. support the multiregional model.. b. support the out-of-Africa model.. c. support both the multiregional model and the out-of-Africa model.. d. disprove both the multiregional model and the out-of-Africa model.

Answers

A. Support the multiregional theory as it would suggest that the evolution from homo erectus had happened naturally across the globe. 

Answer: The correct answer for the blank is-

a. support the multiregional model.

Multiregional model is a scientific model that provides explanataion of pattern of evolution of modern humans. It is an alternative explanation of Out of Africa model.

According to this model, modern humans that are present around the world (that in various regions or multiregions of the world) show similarity to the Homo erectus found in Africa.

In other words, species of human beings first originated in Africa as Homo erectus, which then underwent subsequent human evolution upon dispersing in various regions around the world. These species include all archaic forms of human like Homo erectus, Neanderthals, and evolved worldwide as Homo sapiens ( modern human forms).

Thus, option a) is the right answer.

What feature of the ocean basin is actually part of the continental crust?

Answers

Continental shelf. The continental shelf has always been thought about as part of the oceanic basin, but it's actually a submerged part of the continental crust.  Continental shelf and continental slope are part of the continental margin that forms the outer edge of a big landmass.

The loss of the gene coding for an orange crest in the bird population described above is an example of _______.

Answers

The loss of the gene coding for an orange crest in the bird population described above is an example of genetic drift.
Genetic Drift is the change in the frequency of an allele in a population due to random sampling of organisms.

genetic drift

I got it right on study island.

The use of wells to obtain drinking water is a modern convenience. Is this true or false?

Answers

Between true and false, the most probable and the likely one to be the correct answer would be false.

The use of wells to obtain drinking water is not a modern convenience. It might have been a convenience in the past, but with our technological advancements, the use of wells aren't that popular anymore. It is not disregarded though that the usage of wells aren't dropping to a stop since they are still utilized by people usually living in the rural areas. As for the convenience part, well it isn't as convenient as it seems since establishing the well itself would take so much work.

it was false. i just took the test

Carbon is the basis of all life and is constantly being cycled through ecosystems. In which form is carbon passed along from plants to animals?

Answers

carbon passed along from plants to animals in all of these forms: proteins, carbohydrates and lipids

Answer:

Carbon compounds plants passing in the form of carbohydrates, protein, and lipids along the food chains to the animals.

Explanation:

In the food chain, plants produce glucose as food and cellulose for their cell wall. Animals eat plants for their food. So through the food chain, carbon presents in plants move to animals in the form of lipids, proteins, and carbohydrates mainly.

Has positive and neg. mating strands

Answers

Fungi Reproduction. Fungi can reproduce asexually by fragmentation, budding, or producing spores, or sexually with homothallic or heterothallic mycelia.
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