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slega [8]
3 years ago
8

Evolution can occur at different rates, however, for evolution to occur, there must be?

Biology
1 answer:
Roman55 [17]3 years ago
4 0
Only the successful competitors will reproduce, mortality is very high. Four (4) conditions for natural selection. Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population.
A third basic principle of evolution is competition. Replicating molecules compete with one another for available resources such as chemical precursors, and the competition allows the process of evolution by natural selection to occur. Variation will produce differing populations of molecules.
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The _____________ cells in the _________________ of a nephron can cause and increase or decrease in body pH. A. intercalated; co
gayaneshka [121]

Answer:

The intercalated cells in the distal convoluted tubule of a nephron can cause and increase or decrease in body pH.

Explanation:

The renal collecting duct is the nephron segment where the final urine content of acid equivalents and inorganic ions are determined.

Two types of cells regulate the acid-base and volume homeostasis.

Intercalated cells, which express acid-base transporters and vacuolar H+-ATPase, maintain an apropriate acid-base balance and principal cells that express the epithelial sodium channel ENaC and aquaporin 2, regulate electrolyte reabsorption.

Filtered bicarbonate is predominantly reabsorbed from the proximal convoluted tubule about 80% and the remaining bicarbonate is reabsorbed from the thick ascending limb of the loop of Henle, the distal nephron, specifically the distal convoluted tubule & the connecting tubule, and finally the cortical and both the outer and inner medullary collecting duct.

Intercalated cells are enriched in mitochondria, and express proteins involved in transport of proton equivalents such as vacuolar H+-ATPase, carbonic anhydrase II and bicarbonate transporters. There are two types of intercalated cells Type-A and Type-B.

7 0
3 years ago
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What characteristic do the nucleus, the mitochondria, and the vacuoles of animal cells have in common?
Helen [10]
The correct answer is (c,) They are all enclosed by membranes made of phospholipids. The nucleus, the mitochondria, and the vacuoles of animal all are enclosed by membranes that are made of phospholipids. That is what they all have in common.
3 0
3 years ago
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Natural sugars, such as the lactose in milk and the fructose in fruit, and added sugars that are found in candy, soft drinks, fr
Vlada [557]

Hello there!

As you may know, there are two main types of carbohydrates:

  • Simple
  • Complex

Some examples of complex carbohydrates include potatoes, split peas, pinto beans, asparagus, and practically anything that is low in sugar and high in fiber.

Simple carbohydrates, for the most part, are the complete opposite. When you're eating a sugar cookie or drinking processed juice, you are basically consuming simple carbohydrates.

With this said, the answer to your question is simple carbohydrates.

I hope I helped!

Remember, anything sweet is simple. :)

5 0
3 years ago
If a plant uses up all the available carbon dioxide, which event will happen first?
Korolek [52]
A decrease in its sugar production.
4 0
3 years ago
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Which statement best illustrates why carbon is important to living things?
Sunny_sXe [5.5K]
Carbon-based macro molecules are found in all life forms.
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3 years ago
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