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vesna_86 [32]
2 years ago
6

.The pollen-producing structures of gymnosperms are locked away in cones and generally not accessible to insects. What mechanism

might they use for pollination?
Biology
2 answers:
jeyben [28]2 years ago
8 0

Answer:

Wind

Explanation:

Gymnosperms can be described as plants which lack flowers and fruits.

As they do not have flowers to attract insects like the angiosperms, they can, however, transfer their pollen through the wind. As pollen is very light in weight hence, it can be transported by the wind. The pollen transported by the wind usually results in self-pollination as the wind is not able to take the pollen to long distances.

slamgirl [31]2 years ago
8 0

The mechanism they use is cross pollination

Explanation:

Pollination can be known as transfer of the pollen from anther to the stigma. It can be from the one flower or different flower also. In gymnosperms, pollination occur from the cone of male to the female.

Cross Pollination: The pollen transfers from the flower anther of individual flower to the part of flower which is called stigma part of any another flower on a different individual of the common species.  

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2 years ago
many different types of mutations can occur within the body .cystic fibrosis is a genetic disorder that is caused by different m
denpristay [2]
<h3>Question from alternative source</h3>

Many different types of mutations can occur within the body. Cystic fibrosis is a genetic disorder that is caused by different mutations within the CFTR gene. One mutation in the CFTR gene that leads to cystic fibrosis causes translation to end earlier in the gene sequence. Which type of mutation causes this translation error that leads to cystic fibrosis?

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Answer:

Nonsense

Explanation:

Nonsense mutations describe mutations that produce a premature stop codon. The stop codons are UAG, UAA, and UGA. A way in which this could arise is, for example, if there was a substution of a nucleotide in the mRNA codon UAC (which codes for the amino acid Tyrosine) to the nucleotide UAG (which codes for a stop codon).

The translation machinery would reach this codon, which signals that translation should be terminated. This would mean that the mRNA would be released, and a truncated (shortened) version of the amino acid would be produced. This is likely to be non-functional, and may even be marked for destruction by the cell.

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Answer:

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