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Zinaida [17]
3 years ago
12

What are simple plants characterized by lack of vascular tissues?

Biology
1 answer:
Nezavi [6.7K]3 years ago
5 0
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In a population of Amish people, the frequency of the recessive autosomal allele for polydactyly is 1.2%. What percent of the po
pashok25 [27]

Answer:

2.37%

Explanation:

3 0
3 years ago
The existence of introns in mRNA-encoding genes seems to be a problem because so much cellular energy goes into splicing them ou
Svetllana [295]

Answer:

In normal conditions, introns serve following functions in the body of an organism:

1) They contain genes of miRNA which are known as Mirtrons, reverse transcriptase, endonucleases, transposase etc.

2) It is because of presence of introns that alternative splicing of mRNA is possible. The sex determination in drosophila is based on alternative splicing.

Apart from this, alternative splicing can be useful and beneficial in an unforeseen situation such as an environmental problem which is faced by the organism for the first time.

Explanation:

Alternative splicing is an important mechanism because with the help of alternative splicing different type of proteins can be synthesized from the same pre mRNA transcript. In case suddenly the surrounding environment of an organism is changed and the environmental conditions have become extremely harsh due to which organism's life is at stake, in such situation organism may make a different type of protein through alternative splicing which can help the organism in survival.  

Default splicing in Drosophila leads to the development of male off-spring while female off-spring is produced as a result of alternative splicing.  

8 0
3 years ago
In most sexually reproducing organisms, the diploid phase of the life cycle begins at
valkas [14]

The diploid phase of the life cycle begins with the formation of the zygote.

Meiosis is referred to the type of cell division which occurs in the production

of male and female sex cells. This also occurs during sexual reproduction.

Parent cells provide male and sex cells such as sperm and egg which

contains DNA. They then fuse together to form a zygote which is the diploid

phase as a result of the fusion of two haploid cells. The zygote then

continues to undergo some meiotic processes which reduces it to back to a

haploid cell and consequent growth to form a fetus.

Read more on brainly.com/question/16249478

4 0
3 years ago
Altocumulus and altostratus clouds usually bring which of the following types of weather? a. light snow or rain
Tju [1.3M]
Altocumulus and altostratus clouds usually bring cold, windy conditions. If you come across this type of weather make shure you are protected from drizzle or light snow.
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The process by which organisms keep their internal conditions relatively stable is called?
Assoli18 [71]
That process is called homeostasis
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