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soldi70 [24.7K]
3 years ago
6

About what percentage of the entire existence of Earth have bacteria been alive?

Biology
1 answer:
mihalych1998 [28]3 years ago
6 0
At least 75% of the history of the earth
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What codes for proteins?<br><br> A. DNA<br> B. RNA<br> C. Polypeptides<br> D. Amino acids
sveticcg [70]

Answer:

D. Amino Acids

Explanation:

DNA and RNA viruses are included in an organism's genome. The genome component that codes for a protein or RNA is called a gene. The protein-coding genes consist of tri-nucleotide units called codons, each with an amino acid code.

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4 years ago
Put the following terms in the order they would occur in the angiosperm life cycle. The first one is done.
olga nikolaevna [1]

Answer: Angiosperms are the plants which produce flowers for sexual reproduction.

Explanation:

In the angiosperm life cycle the following events occur:

1. Seed germination: Under suitable condition inside the soil obtain water, oxygen and minerals the seed germinates and from the two precursors plumule from where the stem emerge and radicle  from where the root emerges.

2. Mature plant with flower: The plant gets matured with the develop of root and shoot and from the shoot the bud originates which produces the flower.

3. Pollination: During the process of pollination a mature pollen grain is transferred towards the female reproductive structure typically the stigma receives the pollen grain.

3. Fertilization of pollen with egg in ovary: The pollen is the male gametophyte which develops in the anthers which are the male reproductive structure of the flower and the egg or ovule is the female gamete which develops inside the ovary or female gametophyte. The fusion of male gametes provided by the pollen grain with that of the ovule is called as fertilization.

4. Formation of fruit with seed: After the fertilization process the ovules develop into seed and the ovary into fruit.

5. Seed dispersal: The fruit gets detached from the plant and it may get rotten and dried the dried seeds disperse and may germinate in favorable conditions.

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3 years ago
Grasslands are areas between the forests and deserts. The table below shows the amount of species per section of each of the bio
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Answer: it will be the second one.

Explanation:

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Help! my nose bleed for more than 30 min and i feel abit dizzy what shoud i do, i am a little kid and my parents are sleeping be
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2 years ago
what role do bacteria and other tiny organisms have in making sure that nutrients are always available in ecosystems
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Bacteria and other small organisms within an ecosystem play an important role in maintaining homeostasis of an ecosystem while also helping to break down dead materials. These small organism play a vital role in decomposing of dead plant and animal matter that then becomes nutrients for the ecosystem in the future provide fertile soil for new plant life to grow supporting the cycle of life in an ecosystem. 
7 0
3 years ago
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