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vredina [299]
3 years ago
12

1. difference of microspore mother cell, microspore,pollen

Biology
1 answer:
Naily [24]3 years ago
5 0

Answer:

By the end of this section, you will have completed the following objectives:

Describe the two stages of a plant’s lifecycle

Compare and contrast male and female gametophytes and explain how they form in angiosperms

Describe the reproductive structures of a plant

Describe the components of a complete flower

Describe the development of microsporangium and megasporangium in gymnosperms

Explanation:

brainliest pls

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Create 3 true and 1 false about swamps and fresh water.
Bingel [31]

Answer:

Swamps: Saturated with water, covered with trees, covered with aquatic plants, coral live in swamps

Fresh water: Cover 20% of the Earth, contain many biomes that have fish, include lakes, ponds, streams, and rivers, have high concentrations of salt

Explanation:

4 0
3 years ago
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Beriberi is caused by a deficiency of thiamine in the diet.
denis23 [38]

Answer:

Thiamine pyrophosphate  (derived from vitamin B1) is a coenzyme required for the activity of pyruvate dehydrogenase enzyme complex.

Explanation:

Pyruvate is the end product of glycolysis. During aerobic cellular respiration, pyruvate is oxidatively decarboxylated into acetyl CoA which in turn enters the Kreb's cycle. Oxidative decarboxylation of pyruvate is carried out by enzyme complex pyruvate dehydrogenase (PDH). The first step is simple decarboxylation and is catalyzed by pyruvate decarboxylase of the PDH complex.

The enzyme pyruvate decarboxylase and has a tightly bound coenzyme, thiamine pyrophosphate. Thiamine pyrophosphate is derived from vitamin B1. Lack of vitamin B1 in the human diet leads to beriberi that is characterized by an increased concentration of pyruvate in blood urine since oxidative decarboxylation cannot occur due to lack of the coenzyme thiamine pyrophosphate.

3 0
3 years ago
Evolution reinforcement
Alecsey [184]

Answer:

Reinforcement is the process by which natural selection increases reproductive isolation. Reinforcement can occur as follows: When two populations which have been kept apart, come back into contact, the reproductive isolation between them might be complete or incomplete. If it is complete, speciation has occurred.

Explanation:

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4 0
3 years ago
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Rick, an athlete, notices a ring shaped inflammation around his neck. Which medication can treat this problem?
Dmitriy789 [7]

Answer:

Ring shaped inflammation would make me think ringworm. In which the answer would be Antifungal as you can buy OTC antifungal cream for relief.

Explanation:

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What do autotrophs do durring photosynthesis?
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They make their food furing photosynthesis
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