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gayaneshka [121]
3 years ago
15

Recognize the role early cells played in shaping life on Earth

Biology
1 answer:
ki77a [65]3 years ago
4 0

Answer:

Present-day cells evolved from a common prokaryotic ancestor along three lines of descent, giving rise to archaebacteria, eubacteria, and eukaryotes.

Changed the composition of the oceans. Most of the iron was precipitated out by early life.

Changed the composition of the atmosphere.  Oxygen became available in abundance.

Explanation:

mark as brainliest pls

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5.
Gwar [14]
Concentration gradient, size of the particle, and temperature are all factors
5 0
3 years ago
You observe two populations of chimpanzees using sticks to dig termites out from nests for food. One population uses long sticks
icang [17]

Answer: B. The population using long sticks has mostly long sticks in its environment

Explanation:

Going back to the statement that reiterates the hypothesis after observations about the apes in the Introduction.

Reviewing the findings in this case, on the behavior of using sticks to dig seem to be the focus the experiment and choice length of the stick.

Making a judgment about whether or not the two finding has been supported is next step.

If there are equal numbers of short and long sticks in the environment of each population and the apes chooses one specific we can say their behavior is learned.

 If the chimpanzees using short sticks have made the the sticks short by breaking long sticks then we can say this behavior is learned.

When the Young chimpanzees in both populations start out using sticks of many different sizes we can see that these variables of learning is yet to be perfected.

When individuals in the population that don’t use the common stick length for that population catch fewer termites this reveals a randomness in the behavior of interest.

At this point we can say that if the population using long sticks has mostly long sticks in its environment then there is a biased objective in the study and this does not support the hypothesis that the choice of stick length is a learned behavior.

3 0
3 years ago
The three main types of scientific investigation are descriptive,comparative ,experimental . Wich components are included in all
Setler79 [48]
The main component in three investigations is that in my opinion The common denominator of the fact that they are all three still investigations.
5 0
3 years ago
Read 2 more answers
1. Which feature is found in prokaryotic cells but not in eukaryotic cells?
crimeas [40]
The <span>eukaryotic cells do not contain any organelles such a nucleus in particular. The difference in their structures for prokaryotes and eukaryotes will also include the presence of chloroplasts and mitochondria. Also, structures such as cell wall and chromosomal DNA structures are also some of the difference in the two types of cells. The answer to the second question is C. 
</span><span>

</span>
7 0
3 years ago
Polio drops are not given to children suffering from diarrhoea. Why?​
Dmitry_Shevchenko [17]

Answer:

In diarrhea, gut motility is increased. Whatever is ingested, comes out quicker.

Polio drops contain attenuated polio virus. Once given, a large proportion of this viral dose stays in intestine and proliferates to show it’s effect.

If given during diarrhea, with increased motility of gut, most of it will be thrown out fast, resulting in to lesser efficacy. For this very reason we wait till diarrhea is over.

Explanation:

:)

4 0
3 years ago
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