BIOLOGY COLLEGE

If 35% of the bases in a region of the Drosophila genome are guanine, what percentage in that region are cytosine bases?

Answers

Answer 1
Answer:

Answer:

The correct answer is - 35%.

Explanation:

According to the rule of Chargaff the amount of adneine is equalls to thymine and the amount of guanine is equalls to cytosine in DNA. In a double-stranded DNA Adenine pairs with Thymine and cytosine pairs with Guanine.

So, Percentage of Adenine = percentage of Thymine

and, percentage of Cytosine = percentage of guanine

we know,  percentage of guanine = 35%

Thus, percentage of Cytosine will be 35% as well.

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During the period of time labeled Z in the graph, there is a drastic change in biodiversity. Which of following best describes the ecosystem at the rnd of time period Z?

Answers

Answer:

D: The ecosystem has a low biodiversity, so there is less competition over available resources among the species

Explanation:

Trace the blood flow beginning with the right atrium to the 5th digit of the right hand and back again. Use the terms below.

Answers

Right Atrium - Tricuspid Valve - Right Ventricle - pulmonary semilunar valve - pulmonary artery - lungs (arterioles, capillaries, venules), Pulmonary vein, Left atrium, bicuspid valve, left ventricle, aortic semilunar valve, aorta, left subclavin artery, left axillary artery, left brachial artery, arterioles, capillaries, venules, left brachial vein, left axillary vain, left subclavin vein, (superior?) vena cava, right atrium 

, why is studying atoms and their parts and particles helpful to people?

Answers

Answer:

helps us understand more about the universe

The spiral ganglion cells of the inner ear are unipolar.
a. True
b. False

Answers

Answer:

b. False

Explanation:

The spiral ganglion, formed from the primitive otocyst, is located on the cochlea's modulus (axis) and is made up of approximately 35,000 neurons in man. These bipolar neurons are of two types: type I and type II. Its peripheral extensions (dendrites) end in the spiral organ, in contact with the hair cells of which they receive information. Its central extension (axon) ends at the cochlear nuclei of the brainstem.

Organisms use different types of adaptations to aid in their survival. One type of butterfly mimics a dead leaf to evade predators. What type of adaptation is this? a. Biochemical b. Ecological c. Structural d. Physiological Please select the best answer from the choices provided A B C D

Answers

Answer:

It's a structural adaption.

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Here are examples of the other adaptions:

Biochemical= Being immune to scorpion poison

Physiological= Hyoid bone used for roaring

Ecological= The sand grouse has wings that can hold water in its feathers, so it can take water back to the nest

Answer:

c

Explanation:

i got it right

The expected ratio of phenotypes among the progeny of a test cross is 1:1:1:1. Out of 200 total resulting progeny, 48 occur in one of the four phenotypic classes. Given this information, which of the following must also be true?1) Since 48 is so close to the expected value, there is no need to calculate chi square before drawing a conclusion about the ratio.
2) At least one additional cell must also contain a count of 48.
3) The value of observed - expected for this cell = -2.
4) The progeny of this cross do not conform to a 1:1:1:1ratio.

Answers

Answer: The progeny of this cross do not conform to a 1:1:1:1 ratio

Explanation: This is because out of the 200 total resulting progeny, we must have 50 in each phenotype class to conform with the 1:1:1:1 which is not so as we have 48 in one of the phenotypic class already. Therefore, it did not conform to the ratio.

Answer:

The value of observed - expected for this cell = -2

Explanation:

"With a total of 200, the expected number in each cell when the predicted ratio is 1:1:1:1 = 50. The observed number is 48." - Mastering Genetics

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