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3 years ago

Which process initiates the passage of half of a parent's dna to offspring?

1 answer:

8 0

MEIOSIS

This is a process by which a cell divides twice producing 4 cells. These cells contains half of the original genetic material. Sex cells usually undergo these process. During meiosis 1 a cell divides twice producing four daughter cells. There 5 phases in meiosis 1 which are Interphase, Prophase, Metaphase, Anaphase, Telophase and cytokinesis.The second time the cell divides is called meiosis II. These also have phases as the meiosis I but cellular changes is different.

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A species that is likely in the near future to become endangered would best be characterized as which of the following?

Nata [24]

It is between A and B.
But if the species is going to be extinct, that means that they are being threatened.
So the answer is B.

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3 years ago

Match the staining techniques with their purpose.

Dennis_Churaev [7]

A Negative stain such as India ink or Congo red-Look for the presence of a capsule.

This stain method is usually used to stain the area around the microorganism.

B The Gram stain-Divide bacteria into two groups based on cell wall structure (thick vs. thin).

This is type of differential staining used to distinguish organisms based on their staining properties. Gram + and Gram- bacteria stain different because of different cell wall structure.

C The Ziehl-Neelsen Acid-fast stain- Identify bacteria with waxy cell walls such as: Mycobacterium tuberculosis (the cause of TB).

This is also differential staining method which uses heat and phenol to derive dye into the cells with lipid-rich walls.

D Simple stain with a basic dye-Stain microbes a bright color to make it easier to see them in bright field microscopy.

One dye is used in simple staining in order to determinate the size, shape and arrangement of the cells.

E The Schaeffer-Fulton Endospore stain-Identify Bacillus or Clostridium species, such as the causative agents of anthrax, botulism, tetanus and gangrene.

This is a special type of staining only used for the bacteria that can form endospores. Bacteria are first treated with heat and then with malachite green, which is very strong stain that can penetrate endospores.

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3 years ago

Which of the following is an example of a compound?

Stels [109]

Answer:

H2O2 H2O CO CO2 CH4 are all compounds.

Explanation:

Compounds contains 2 or more ions of different elements in different proportion joined by chemical bonds into a molecule.

3 0

2 years ago

Use Figure 1 to evaluate each trigonometric function of angle A . The side adjacent to angle A has length 8 and the side opposit

jonny [76]

The trigonometric ratios are;

Sin A = 0.78
Cos A = 0.625
Tan A = 1.25

<h3>What are the trigonometric ratio?</h3>

The trigonometric ratios are sine, cosine and tangent. Now we have the hypotenuse of the triangle. Figure 1 has been shown in the image attached to this answer.

c = √8^2 + 10^2

c = 12.8

sin A = 10/12.8 = 0.78

Cos A = 8/12.8 = 0.625

Tan A = 10/8 = 1.25

Learn more about the trigonometric ratios:brainly.com/question/13724581

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2 years ago

A sperm cell moves its flagella back and forth in order to move through its environment. Which statement describes how this euka

sergiy2304 [10]

D the cell mitochondria utilize cellular respiration to generate glucose that gives the flagella energy to move

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3 years ago