What did Chargaff discover while studying bases in the DNA of organisms? The bases in the DNA of each organism were unique. The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine. The overall percentages of bases were different from one organism to the next. There were equal amounts of all four bases in every organism, or 25 percent of each base.

Answers

Answer 1
Answer:

Answer: The correct answer is - The ratios of Thymine and Adenine were similar, as were the ratios of Guanine and Cytosine.

According to the Chargaff's rule, in a DNA molecule, the amount of Guanine (G) is equal to the amount of Cytosine (C) and the amount of Adenine (A) is equal to the amount of Thymine (T).

This is because A pairs with T and G pairs with C.

This means that the ratio of T and A are similar, as are the ratio of G and C.

Answer 2
Answer: The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine and Chargaff discovered this while studying bases in the DNA of organisms. The correct option among all the options that are given in the question is the second option. I hope the answer comes to your help.

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The following tests can be used for the diagnosis of premature rupture of membranes, except: a) Nitrazine test b) Ferning test c) Schiller's test d) Nile blue sulfate e) Evans blue test

Answers

Answer:

yes

Explanation:

Final answer:

The Nitrazine, Ferning, Nile blue sulfate and Evans blue tests can all be used for the diagnosis of premature rupture of membranes. Schiller's test is the outlier, as it is used primarily for identifying cervical dysplasia which is a precancerous condition.

Explanation:

The diagnosis of premature rupture of membranes, a condition in pregnancy where the amniotic sac breaks prior to labor, can be done using several tests. These include the Nitrazine test, where the pH of vaginal discharge is noted with a color change indicating rupture, the Ferning test seeing a pattern resembling fern leaves on a microscope slide due to the presence of amniotic fluid, and the Nile blue sulfate and Evans blue tests which involve instilling a dye and observing if it appears in vaginal secretions. Schiller's test, however, is unrelated to this diagnosis. It is used primarily to identify cervical dysplasia or precancerous changes in cervix by using iodine stain.


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What two behaviors that allow organisms that stay in Masssachusetts all year to survive seasonal changes?

Answers

-Hibernation. Reduction of body metabolism, which allows for low oxygen and energy consumption.
-Preparing supplies for the winter, in the form of food or fat.
-In case of cold-blooded animals finding shelter, where temperature will be high enough fo them to survive.

Which statement about stomata is true?A.)The number of stomata is greater on the upper surface of the leaf.

B.)The number of stomata is greater on the lower surface of the leaf.

C.)The number of stomata is equal on both surfaces of the leaf.

Answers

The answer is B. The number of stomata is more on the lower surface of the leaf. The primary function of the stomata is to regulate moisture loss from the plant. The upper surface of the leaf is more exposed to the air and sunshine thus water is more susceptible to evaporation. However, the stomata is abundant on the lower surface, the location of it helps the plants to conserve more water 

Gentoo penguins will present a mate with a pebble that they find to attract a mate. Emperor penguins have a specific call and movement that they make to attract a mate. Which type of isolation do these penguins demonstrate?A.)temporal isolation
B.)behavioral isolation
C.)geographical isolation
D.)anatomical isolation

Answers

B is the right answer. Gentoo and Emperor penguins employing different mating rituals is an example of behavioral isolation. Behavioral isolation is the umbrella term for a host of differences between species, although in the case of different mating behaviors this variety of behavioral isolation is intended to prevent cross-breeding between different members of the same species in the same environment.

Answer:

behavioral isolation

Explanation:

an amoeba in a pond engulfs and consumes a paramecium. The amoeba uses which of the following to quickly break down the organic molecules in paramecium O enzymes O glucose O polysaccharides O water​

Answers

Answer:

Enzymes

Explanation:

Amoeba uses enzymes to breakdown organic molecules because enzymes are biological catalysts that help to speed up the rate of chemical reaction or breakdown large molecules.

Amoeba have vacuole which fuses to the lysosomes by cytoplasmic movements. The lysosomes are organelles that contain enzymes amylase and proteinase which help to digest carbohydrates and proteins.

Final answer:

An amoeba in a pond uses enzymes to break down the organic molecules in a paramecium that it engulfs and consumes.

Explanation:

An amoeba, a type of single-celled organism, engulfs its food and then breaks it down using a biological catalyst known as enzymes. The enzymes are involved in the process of digestion, which allows the amoeba to obtain nutrients and energy from its food, in this case, a paramecium. Enzymes work by lowering the activation energy for a reaction, making it easier for the reaction to occur and therefore the digestion process in amoeba happens more quickly.

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Why is it necessary for the trachea to have rings of cartilage in its walls?

Answers

these incomplete cartilaginous rings prevent the trachea from collapsing
Dianak is 100% correct. If the trachea collapses, you would not have the capability to breathe.