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DerKrebs [107]
3 years ago
12

Which option best explains why nutrients for epithellal cells are obtained by diffusion from the underlying connective tissue?

Biology
1 answer:
slamgirl [31]3 years ago
7 0
avascularity  is the  option  term which  best   explain  why  nutrient   for  epithelial  cell   are  obtained  by   diffusion   from the   underling   connective  tissue.  Epithelial membrane  consist of   continuous   sheet  of  cell. one   or  more  layer  thick  and  are  attached  to  the   underlying  connective  tissue  by  a   basement  membrane. Nutrient  and   oxygen  reach  epithelial  membrane   by  diffusion   from  blood  vessel  which   are  located  in  the   connective  tissue   beneath the basemen  membrane
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DNA encodes proteins, specifying the amino acids that compose them. Which of the following is most similar to a protein as the p
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D:A string of beads is the
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3 years ago
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Is it more beneficial for humans to undergo sexual reproduction than asexual reproduction?
Rama09 [41]

Answer:Advantages and disadvantages of sexual and asexual reproduction

Sexual reproduction involves two parents and the joining of male and female gametes during fertilisation. The offspring inherit a mixture of genes from both parents, so are different to each other and their parents.

The advantages of sexual reproduction:

produces genetic variation in the offspring

the species can adapt to new environments due to variation, which gives them a survival advantage

a disease is less likely to affect all the individuals in a population

In asexual reproduction there is only one parent. The offspring are clones of the parent and each other.

The advantages of asexual reproduction include:

the population can increase rapidly when the conditions are favourable

only one parent is needed

it is more time and energy efficient as you don't need a mate

it is faster than sexual reproduction

The disadvantages of sexual reproduction:

time and energy are needed to find a mate

it is not possible for an isolated individual to reproduce

The disadvantages of asexual reproduction include:

it does not lead to genetic variation in a population

the species may only be suited to one habitat

disease may affect all the individuals in a population

Examples in the natural world

Bacterial reproduction

Bacteria, such as E. coli, reproduce asexually. An advantage of this is that they can produce many bacteria very quickly. A disadvantage is that all of the bacteria are genetically identical. If an antibiotic was used on the bacteria, then all of them would die. The population would be wiped out. The only way for variation to be introduced into the population is by random mutation.

Rabbit reproduction

Most animals reproduce sexually, for example, rabbits. The process of sexual reproduction introduces variation into the species because the alleles that the mother and the father carry are mixed together in the offspring. A disadvantage is that sexual reproduction takes longer than asexual reproduction. A mate must be found, the egg must be fertilised by sperm, and then the offspring develop. The benefit of introducing genetic variation into the species, however, outweighs this disadvantage. If a disease were to hit the rabbit population, then perhaps not all of the rabbits would be affected because of the variation in the population. This means that some individuals would survive and be able to reproduce and generate more offspring.

Asexual and sexual reproduction in fungi

Some fungi are able to reproduce both sexually and asexually. Fungi reproduce using spores which they release into the environment. A new fungus will grow from the spore. The Coprinus cinereus fungus can produce spores by sexual reproduction to help create variation in the species. This method of reproduction is advantageous when the environment is changing because the variation introduced leads to an increase in the probability that a variant that can deal with the change. Coprinus cinereus also produces spores by asexual reproduction. These spores can be produced quickly and in large numbers to enable many individual fungi to develop. A disadvantage of these spores is that they generate offspring that are unlikely to be resistant to unfavourable conditions because they are all genetically identical.

Common inkcap mushrooms

Some mushrooms can carry out both asexual and sexual reproduction depending on their environment

Explanation:spores can be produced quickly and in large numbers to enable many individual fungi to develop. A disadvantage of these spores is that they generate offspring that are unlikely to be resistant to unfavourable conditions because they are all genetically identical.

Common inkcap mushrooms

Some mushrooms can carry out both asexual and sexual reproduction depending on their environment

7 0
2 years ago
Each organism in a population produces more offspring than can survive. This is called .
densk [106]

Hey there!

It's called biotic potential.

This is because for natural selection to occur, the populations need to have variations.

I hope that helps! :)

6 0
3 years ago
A 2 inch, f/4 reflector has a focal length of.
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The answer is B.) 4 inches
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Which term defines a well tested,scientifically supported statement that explains how something works
IRISSAK [1]

Answer:

The term scientific theory indicates the well supported statement, which explain the working of any phenomenon.

Explanation:

The Scientific theory is determined after experimenting about a particular hypothesis. The scientific theory have the proper explanation about the phenomenon, why it and how it occurs

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