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tatuchka [14]
3 years ago
7

Why are cacti green and why do they need needles

Biology
1 answer:
Arturiano [62]3 years ago
7 0

Answer:

The needle-like leaves act as a self-defense mechanism that protects the plant from predators. The stem of the cactus plant is swollen and contain numerous collapsible water-storage cells that store water for a relatively long period. The stem is green and performs photosynthesis.

Explanation:

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an organism whose niche involves taking energy from sunlight, and using it to make substances for energy is most limey______ ??
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D. A producer. Plants go through photosynthesis which is basically turning light energy into energy for the plant.
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4 years ago
how can a mutaion affect protein synthesis by a cell? Do you think there are different consequence if it happens in a gamete cel
zmey [24]

Answer/Explanation:

A mutation alters the sequence of DNA. Therefore, the mRNA that is transcribed from the DNA has a different sequence.

This mRNA goes on to be read by the protein synthesis machinery in the cell. The protein synthesis machinery translates the sequence of the mRNA into an amino acid sequence, which makes up the protein.

If the sequence of the mRNA is different, due to a mutation in the DNA, then the cell will translate a different sequence into an amino acid. This alters the composition of the protein.

Mutations can be small, and affect only one amino acid, or they could be huge, and impact the entire protein.

Mutations have very different consequences in gametes vs non-gamete cells.

If a mutation occurs in a gamete, that means the mutation will be passed on to the next generation, as it is contained in the DNA in the egg or sperm that becomes fertilised to make a gamete.

However, mutations that occur in other cells are not passed on to the next generation. That does not mean they do not have effects. E.g. mutations in the skin caused by exposure to UV rays from the sun can contribute to cancer, but would not be passed on to the individual's children

5 0
3 years ago
1.why were these seven plates considered as the major plates?2-3sentences
zvonat [6]

Answer:

Due to their large size.

Explanation:

Seven plates considered as the major plates on the earth because of their large size. African, Antarctic, Eurasian, Indo-Australian, North American, Pacific and South American plates are the seven major plates present on the earth. The importance of identifying the major plates is that they provide information about the location of happenings earthquakes and volcanic eruption.

7 0
3 years ago
Which of the following accurately best describes the Ph scale?
lina2011 [118]
The Ph scale measures the acidity or alkalinity of water soluble substances (pHstands for 'potential of Hydrogen'). A pH value is a number from 1 to 14, with 7 as the middle (neutral) point. Values below 7 indicate acidity which increases as the number decreases, 1 being the most acidic.
4 0
3 years ago
Read 2 more answers
Which of the following types of mutation, resulting in an error in the mRNA just after the AUG start of translation, is likely t
san4es73 [151]

Answer:

The correct answer is option B) "a deletion of two nucleotides".

Explanation:

A frameshift mutation is a type of genetic modification caused by the insertion or deletion of one or more nucleotides in a position that results in changing the sequence at which codons are translated in the ribosome. Frameshift mutations have the most serious effect on the polypeptide products since it results in changing completely the sequence of the protein. A deletion of two nucleotides after the AUG start of translation would result in a frameshift mutation, therefore this mutation would have the most serious effect on the polypeptide product.

8 0
3 years ago
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