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ale4655 [162]
3 years ago
13

9. Knowing what you know about how a substance travels in

Biology
1 answer:
Romashka-Z-Leto [24]3 years ago
6 0

Answer:

Higher

Explanation:

Molecules such as oxygen move from a higher concentration to a lower concentration across a semi-permeable membrane. This process is called simple diffusion.

Therefore, for oxygen to leave the alveoli and enter the blood, there would need to be a higher concentration of oxygen inside the alveoli and a lower concentration of oxygen in the blood.

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The reproductive parts of an angiosperm are the _________.
Musya8 [376]

Answer:

e. carpel and stamen is the correct answer.

Explanation:

  • The reproductive parts of an angiosperm are the carpel and stamen.
  • Angiosperms are the flowering plants that bear seeds.Examples of angiosperms are: Apple, Brinjal.
  • The stamen function is to produce and it is a male reproductive structure.
  • Stamen consist of two parts:
  • Anther
  • Stalk
  • Carpel function is to produce egg cells and to protect the developing embryo and it is female reproductive structures.
  • Carpel has three parts:
  • stigma
  • Style
  • Ovary
5 0
2 years ago
Which of the following is true regarding cultivation and isolation of animal viruses? View Available Hint(s) Which of the follow
Studentka2010 [4]

completed question'

.....culturing viruses that requires a human host

Answer:

Diploid cell culture lines, developed from human embryos, are widely used for culturing viruses that require a human host

Explanation

Viruses can not thrive in a non-living host or artificial media.They  are intracelular parasites  which needed living host to replicate . Cultures lines from Human embryo  in are therefore used for culturing viruses of human host, so that its mode of replication and gene expression can be studied, and therefore its virulence can easily be studied.

This method have the advantage that;

1.there is no need to make use of the whole animal rather,on a tiny tissue needed can be isolated for culture.

2. the cells growth is continuous,and can be preserved in liquid Nitrogen and renew for future culture

3. cells can be grown in different containers,  with ability to decide the number of cells needed.

Temperature is kept at optimum for human in the culture at  37 degree centigrade, nutrients are provided, NaHC03 as buffers for C02, and  the medium is humidified.

3 0
3 years ago
Describe the relationship between mutations, alleles, variation, natural selection, and chance.
Alona [7]

Natural selection is where positive traits survive more, allowing those to become more common. Mutation is where radioactivity changes genes in a random way. Natural selection allows positive mutation to become more common. Adaptation is where natural selection works for a species specifically more a new habitat.

5 0
2 years ago
This organelle carries which ??
Serhud [2]

Answer:

genetic info

Explanation:

3 0
2 years ago
Koalas are marsupials that are found in eastern Australia. Although their ancestors lived mostly on the ground, modern koalas sp
forsale [732]
The right option is the second option, which states "<span>fur color that closely matches the eucalyptus bark color</span>". Change is in the fur color of Koala's to match the bark color of eucalyptus tree is a structural adaptation that fits them for their habitat as tree-dwellers.
6 0
3 years ago
Read 2 more answers
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