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Snezhnost [94]
2 years ago
15

Classes of pteridophytes​

Biology
1 answer:
irga5000 [103]2 years ago
4 0

Answer:

There are four classes, namely:

Psilopsida.

Lycopsida.

Sphenopsida.

Pteropsida.

Explanation:

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Evolution can be described as the change in __________ frequencies of a __________ over time.
Tresset [83]

Explanation:

In population genetics, the term evolution is defined as a change in the frequency of an allele in a population. ... The allele frequency within a given population can change depending on environmental factors; therefore, certain alleles become more widespread than others during the process of natural selection.

3 0
3 years ago
Why are the leaves in the cactus plant modified to form spines?​
Ludmilka [50]

Answer:  Leaves in a cactus are modified into spines to reduce loss of water from leaves by transpiration. Then the plant makes from the process of photosynthesis which is performed by the stem.

Explanation:

5 0
3 years ago
Explain WHY photosynthesis and respiration are NOT able to create a cycle of energy?
jeka94

In a plant cell, photosynthesis and cellular respiration can both take place simultaneously. Plants carry out both photosynthesis and cellular respiration during the day. Cellular respiration continues because it provides the energy required for essential cell functions.

<h3></h3><h3>What role of  photosynthesis and respiration in plant?</h3>

Water and carbon dioxide are changed into oxygen and glucose during photosynthesis. The plant consumes glucose and produces oxygen as a byproduct.

Oxygen and glucose are transformed into water and carbon dioxide during cellular respiration. By-products of the process include carbon dioxide, water, and ATP, which is turned into energy.

To power cellular respiration, photosynthesis uses the energy it produces. During photosynthesis, solar energy is used, collected, and stored in the bonds of glucose molecules.

Therefore, photosynthesis and respiration not involve energy formation cycle.

Learn more about  photosynthesis and respiration here:

brainly.com/question/24514685

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7 0
1 year ago
Read 2 more answers
Help if i fail i will not pass
Vinil7 [7]

Answer:

3

Explanation:

I hope this is correct and have a great day

5 0
3 years ago
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What is a triacylglycerol ? Discuss the advantages of organisms having triacylglycerol as energy storage molecule?
Sergeeva-Olga [200]

Answer:

Triacylglycerols are acylglycerols with three fatty acid molecules, generally long chain, which can be the same or different; we speak of simple triacylglycerols when there is the same fatty acid in all three glycerol positions, but most are mixed triacylglycerols, with at least two different fatty acids. The properties of triacylglycerols will depend on the type of fatty acids they contain.

Most of the fats and oils of both animal origin (tallow, butter) and vegetable (olive, corn, sunflower, palm, and coconut oils) are formed almost exclusively by triacylglycerols.

Physiologically, triacylglycerols are an important energy reserve. In most eukaryotic cells, triacylglycerols are stored in the cytosol as microscopic fat droplets. In vertebrates there are specialized cells in the storage of fat, adipocytes. In humans, the presence of fatty tissue under the skin, in the abdominal cavity and in the mammary gland stands out.

5 0
3 years ago
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