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love history [14]
3 years ago
7

Which cell cycle checkpoint determines whether the DNA has been replicated correctly? a. the cell growth checkpoint b. the DNA s

ynthesis checkpoint c. the mitosis checkpoint d. the G2 checkpoint
Biology
1 answer:
Zolol [24]3 years ago
8 0
B. The DNA synthesis checkpoint
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Now we need to prepare a buffer that has a pH of 7.4. We need this specific pH to
Anestetic [448]

Answer:

b) By mixing weak base with its conjugate acid and then adjusting the pH with strong  acid.

Explanation:

Hello,

In this case, considering that the buffer required a pH greater than 7 where the basic conditions are present, we need a weak base and its conjugate base in order to assure such pH greater than 7. Moreover, by using a strong acid, we can gently add it in order to decrease the pH up to 7.4 via a properly measured neutralization of the necessary moles of base up to a hydrogen concentration of 3.98x10⁻⁸ (pH). Therefore, answer is b) By mixing weak base with its conjugate acid and then adjusting the pH with strong  acid.

Best regards.

8 0
3 years ago
Examine the diagram of a cell.<br><br><br><br> Which organelle is marked with an X?
Sergio [31]

Answer:

Mitochondrium

Explanation:

|•-•| :)

7 0
2 years ago
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Which atmospheric level is farthest from the lithosphere?
kherson [118]
Honestly it would be the Exosphere<span> but since that's not one of the choices it would be the Thermosphere. </span>
5 0
3 years ago
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The data in the graph are the result of a paramecium being placed in a hypertonic salt solution. mc026-1.jpg Based on the data i
Alex787 [66]
<span>Base on the data in the graph, the event that would most likely happen if the paramecium were placed in distilled water is that "The contractions would increase." This is the result of a hypertonic solution. </span>The net movement of water in an aqueous solution is form the higher water concentration to a lower water concentration. A hypertonic solution has higher solute in the cell than the outside. The movement is from the cell to the outside and so the cell will shrink. 
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3 years ago
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A. Secretes hormones
Vadim26 [7]

Answer:

A. 3

B. 4

C. 5

D. 6

E. 2

F. 1

Explanation:

1. Integumentary system.

This is an organ system that consists of hair, skin, nails and exocrine glands with receptors that senses the outer stimulus and environmental conditions, through homeostasis maintain stability of the internal environment.

2. Nervous system.

It receives sensory information and signals, convert them to nerve impulses that are transmitted to the body and brain via the spinal cord using nuerons and axons. It also intergrates, retains and analyses information in the brain.

3.Endocrine system.

Secretes hormones and chemicals in response to stimulus from the nervous system to maintain balance using feedback loops i.e, negative and positive.

4. Lymphatic system.

Part of the immune system that consist of vessels that carries lymph, cleaning the blood by filtering lymph with foreign particles into the lymph node.

5. Urinary system.

Used to eliminate waste from the body, regulates blood pressure, volume and pH. It also used to retain electrolytes and metabolites.

6. Respiratory system.

Used for gaseous exchange using the blood, heart and lungs. Air enters the lungs, transported by blood and is pumped by the heart to all body parts where oxygen is dropped, carbon dioxide is collected by the veins to the lungs and released to the atmosphere.

8 0
3 years ago
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