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labwork [276]
3 years ago
5

What is sporopollenin?

Biology
2 answers:
Sidana [21]3 years ago
8 0
Its a very chemically inert and stable biological polymer that constitutes the main component of the tough outer layer of pollen grains and spores.
ehidna [41]3 years ago
6 0
It is the though outer layer/wall of spores and pollen grains. Kind of similar to a cell wall! 

Hope that helps! 
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What must be true if prokaryotes evolved into eukaryotes by absorbing other cells
erastova [34]

Answer:

The correct option is 'the ability to absorb other cells gave some prokaryotes a survival advantage.'

Explanation:

The scientists have brought forward the theory of endosymbiosis which explains how eukaryotic cells evolved from prokaryotic cells. According to this theory, the scientists claim that the organelles found today in the cells, once existed as individual prokaryotic cells. These organelles were engulfed by larger prokaryotic cells with time and hence, the eukaryotic cells evolved from these prokaryotic cells. The larger prokaryotes might have engulfed the smaller cells for survival.

4 0
4 years ago
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ASAP PLEASE HELPPP NEWTON’S THIRD LAW<br><br> THANKKK YOUU &lt;33333 (SCIENCE)
blagie [28]

Answer: His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.

Explanation:

4 0
4 years ago
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Why is it more difficult to estimate heritability in humans than in livestock or laboratory animals?
Basile [38]
Humans have always interbread with other groups and tribes, but grazing animals don't do that, so It is much easier to estimate it.
7 0
3 years ago
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What other playing practices may lead to soil loss?​
stepladder [879]

Answer:

1. Wind

When strong winds blow, the topsoil along with the organic matter is carried away by the wind. This happens more often when the land is not covered with grass or plants. Such conditions are very common in desert and semi-desert regions where strong winds blow very frequently.

2. Water

When it rains in the hilly areas, the soil gets washed away towards the plains. The running water deposits the mineral-rich soil in the riverbed and over the years this deposition of soil can change the course of the river. This can lead to floods which cause the destruction of life and property. Water erosion leads to loss of agriculture potential.

3. Overgrazing

When cattle are allowed to graze on the same field repeatedly, all the available grass, including the roots are eaten by them. This makes the topsoil vulnerable to wind and flowing water, leading to soil erosion.

4. Deforestation

Humans have taken land from the forest to cultivate in order to feed the ever-increasing population and to build houses, industries, etc. Cutting down of trees on a large scale for these purposes is deforestation. The roots of trees hold the soil together, thus preventing the soil from getting uprooted. When large areas of the forest are cleared, the topsoil gets eroded by wind and flowing water.

support me

7 0
3 years ago
Why virus, virions, prions have no place in five kingdom classification​
Ainat [17]

Hey, there!!

There is no place for virus, virions, prions in kungdom classification. The reason is they show both living and non living characters, which don't define them whether they are living beings or non living things.

As in 5 kingdoms, the only living organisms are classified.

  • Kingdom Monera mostly deals with the organism which contains prokaryotic cells.
  • Kingdom Protista deals with the organism which have eukaryotic cells.
  • Kingdom Fungi deals with various fungal organism.
  • Kingdom Plantae deals with various type of plants.
  • Kingdom Animalia deals with various type of animals.

So, you can see that there is non of the kingdoms which deals with the organism which have similar characteristics like viruses, virions and prions.

<em><u>Hope</u></em><em><u> </u></em><em><u>it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

7 0
4 years ago
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