Answer:
The correct answer is - They have substances that counteract acids or bases to prevent the pH from changing
Explanation:
All living organisms including humans are water-based systems, which implies that they rely intensely upon liquid equilibria, particularly acid-base equilibria. Hence, all the acid-base and pH ideas we have talked about so far are critical to the chemistry of organic or biological systems.
This is particularly significant for enzyme, which are proteins that go about as catalysts for all major biological reactions. Most enzymes just work inside a specific pH range. Because all natural cycles are subject to pH, cells and creatures must keep up a particular and consistent pH so as to keep their compounds in the ideal condition of protonation they have specific substances that counteract the acid and base to maintain pH.
for instance:
The pH of the Cytoplasm is maintained by the phosphate ion
The pH of the blood is regulated by the bicarbonate ion
Answer:
I think it is the last one D
Answer:
the differentiation of the ovum (egg cell) into a cell competent to further develop when fertilized. It is developed from the primary oocyte by maturation. Oogenesis is initiated in the embryonic stage.
Answer:
Answer is A. Increases in brain size are primarily due to myelination and increases in the number and size of nerve endings.
Explanation:
Myelination is the process which leads to the formation of myelin sheath around axon or nerve impulse.
The myelin formed is a coating rich in fat, that is found around the axon of neuron. It protects the neuron, and at the same time helps the neuron to conduct signals or impulses move quickly and efficiently.
The correct answer would be A. yes, but it is only produced at night when plants can no longer carry on photosynthesis.
Explanation:
This is because when the sun rises Photosynthesis starts which carbon dioxide is taken in and oxygen is given out.