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Elan Coil [88]
3 years ago
7

According to the fossil record, five ________________

Biology
2 answers:
Stolb23 [73]3 years ago
5 0
Mass extinctions. Dinosaurs is the most recent (?)
RideAnS [48]3 years ago
3 0

Answer:

-mass extinctions.

Explanation:

Mass extinction may be defined as the sudden decrease of species on earth. The earth has experienced five mass extinctions.

According to the study of fossil records, five major mass extinction took place in earth's  history that can be determined by identifying traces, left in fossil records.

Mass extinctions destroyed more than half species of earth and thus, lowered the variety of organisms present in today's earth.

Thus, the correct answer to fill in the blank is 'mass extinction.'

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Name the plant cell organelle where photosynthesis occurs
Alexxandr [17]

Answer:

It is called the Chloroplast.

Explanation:

"In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle."

8 0
3 years ago
Mutation is a random and non-adaptive process. This was first proven by:
s2008m [1.1K]

Answer:

Option (d).

Explanation:

Mutation may be defined as the sudden, heritable change in the nucleotide sequence of the organism. Mutation may occur due to the errors in DNA replication or may occurs due to the mutagens.

Joshua and Lederberg experiment explains that mutation is the non adaptive and random process that occur in the organism. He used the replica plating of E.coli and grows them on streptomycin drug. The bacteria was grown on the the primary plate and they are transferred to the secondary plate with streptomycin drug in the growth environment. The resistant strain of bacteria grows in the streptomycin environment.The pattern of bacteria growth on the plate explained that mutation occurs randomly and it is a non adaptive process.

Thus, the correct answer is option (d).

4 0
4 years ago
In anatomy, -tomy means:
san4es73 [151]

Answer

cutting or incision

for example: gastrotomy means a surgical incision to the stomach

5 0
3 years ago
Read 2 more answers
What is the theory of natural selection, and why does it occur in an organism? Give an example.
BlackZzzverrR [31]

Answer:

It occurs in organisms because an organism with a beneficial trait/mutation have a higher chnace of surviving compared to organisms that do not. So the organsims that do survive pass on their genes to the next generation, and the bext generation will pass on those genes to the generation after and so on. But all the organisms that do not possess a beneficial trait/mutations will not survive, therefore they cannot reproduce and pass on those genes to their offspring. This means that most of the population will posses that trait/mutation.

Example: Spotted moths camouflage with bark so they are seen by predators and eaten. Black moths are easily seen by predators and are eaten. Spotted moths then pass on their genes to the next generation of moths.

5 0
3 years ago
Is Carbon is recycled over and over again through people, animals, and plants.
zzz [600]

Yes it is.

Carbon dioxide goes through plants, which they turn into oxygen. Humans and animals take in the oxygen and breathe out carbon dioxide. Then it repeats.

3 0
3 years ago
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