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Yuri [45]
3 years ago
14

How can physical barriers lead to speciation?

Biology
1 answer:
kirza4 [7]3 years ago
8 0
<span>there are two types of speciation: allopatric and sympatric. For allopatric speciation there must be a geographical separation between two populations (a mountain for example). For sympatric speciation there are a LOT of possible barriers.  Hope this helps! </span>
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Dr. Alexander is a scientist who studies a certain type of fly. In his studies, he came across information that says that the fl
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Answer:

Dr. Alexander is a scientist who studies a certain type of fly. In his studies, he came across information that says that the fly doesn't need any calcium in its diet. This question interests him because he doesn't think it is true. He decides to create an experiment that will test whether this question is true. His hypothesis is that a fly will not live without calcium in its diet.

Dr. Alexander believes that flies must have calcium in their diet. In one of Dr. Alexander’s experiments, he feeds one hundred flies a normal diet with calcium. Then he feeds one hundred more flies a diet without calcium. Over seven days he records the following data:

Fed Calcium Not Fed Calcium

Flies alive before test 100 100

Flies alive after test 92 10

Based off the data above what would be a valid conclusion Dr. Alexander could make?

. Alexander is a scientist who studies a certain type of fly. In his studies, he came across information that says that the fly doesn't need any calcium in its diet. This question interests him because he doesn't think it is true. He decides to create an experiment that will test whether this question is true. His hypothesis is that a fly will not live without calcium in its diet.

Dr. Alexander believes that flies must have calcium in their diet. In one of Dr. Alexander’s experiments, he feeds one hundred flies a normal diet with calcium. Then he feeds one hundred more flies a diet without calcium. Over seven days he records the following data:

Fed Calcium Not Fed Calcium

Flies alive before test 100 100

Flies alive after test 92 10

Based off the data above what would be a valid conclusion Dr. Alexander could make?

Calcium is an essential part of a fly's diet.

The experiment did not provide definite results.

Calcium is a nonessential part of a fly’s diet.

Calcium is an essential part of a fly's diet.

The experiment did not provide definite results.

Calcium is a nonessential part of a fly’s diet.

6 0
3 years ago
What molecules are broken down the most often to make ATP
Salsk061 [2.6K]
Lipids and carbohydrates
5 0
3 years ago
Use the drop-down menus to complete each sentence.
Nostrana [21]

Answer:an organism who make its own food is autotrophic

Explanation:

5 0
2 years ago
What do the letters inside the grid of a punnett square represent?
Aneli [31]

Answer:

The correct answer is - Genotype of the offspring

Explanation:

Punnet square is a diagram which is used to predict and show the genotype of offspring that is produced by a cross between male and female gametes. This approach was given by Reginald C. Punnett.

Each grid have a genotype that can determine the phenotype of offspring. The letters used in to fill these grids can be made up of uppercase letters, lower case letters or both. The allele shown in upper case letters shows that the allele is dominant and the allele which is in lowercase letter is a recessive allele.

Therefore the letters inside the grid of a punnet square represents the genotype of the offsprings.

4 0
3 years ago
Are all mixtures solutions? Are all mixture? Give an example
lidiya [134]
Not all mixtures are solutions. It has to be a special homogeneous bond mixture composted of two or more substances
5 0
3 years ago
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