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makkiz [27]
3 years ago
8

Several groups of protists have variable modes of nutrition: Some species are photoautotrophs, whereas close relatives are heter

otrophs. Such diversity even exists within a single species in some cases. Evidence suggests that this pattern is a result of the __________.
Biology
1 answer:
Radda [10]3 years ago
4 0

Answer:

The endosymbiotic theory

Explanation:

Protists are the multicellular organisms which possess characteristics of both the prokaryotes and eukaryotes.

The protist can derive nutrition by either heterotrophic mode or photoautotrophic mode. This variation could exist within the same genus and same species.

This variation could be explained with the endosymbiotic origin of the organisms as some species could engulf the photosynthetic bacteria whereas some could have engulfed the chemosynthetic bacteria.

This can be observed in the green and red algae which depend on a different mode of nutrition belonging to the same group.

Thus, the endosymbiotic theory is correct.

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After reviewing the results of your science fair project, you state that water has increased the growth of fungi. This is a(n)
alexdok [17]

Answer:

conclusion

Explanation:

A conclusion summarizes the report by drawing inferences from the entire project and the impact of the findings or decisions. In the conclusion, you restate the hypothesis and summarize your main points of evidence for the objectives.

5 0
3 years ago
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A rigorous scientific process used to combine findings from research (usually randomized controlled trials) into a powerful and
zavuch27 [327]

Answer: Options A, B, D and E.

A. Process for initiating.

B. standard reporting format.

D. process for synthesizing the body of evidence.

E. process for finding and assessing individual studies.

Explanation:

Systematic review is a scientific process which combines findings from research using random sampling of works from different source of a particular subject and integrating them into a powerful and clinically useful report to guide practice. It is a form of paradigm that guides and aids further research in a particular field.

However, there are components to be considered in other to create a perfect resolution. Initiation of the process begins with gathering of research from different source.

Then, individual research work is also accessed to derive facts and putting up a standard report to explain the total discovery.

5 0
3 years ago
Eukaryotic cells that are destined to divide progress through G1, S, G2, and M phases, which are collectively known as the
julia-pushkina [17]

didnt understand the question, but the answer i think would be

The eukariotic cell cycle

3 0
2 years ago
For natural selection to occur, variation must exist. this is true because without variation
chubhunter [2.5K]
<span>Without variation, there is no difference between members of a population to be "selected for" in the first place. This is a basic tenet of natural selection. A new trait must arise in order to advance or decrease the fitness of the individual, and hence, its ability to pass on its genes.</span>
6 0
3 years ago
If a crystal of potassium permanganate is placed on agar and after 15 minutes the diameter of the area over which the dye has sp
Vadim26 [7]

Answer:

Diffusion rate is 1.96 × 10^{-3} cm^{2}/s

Explanation:

Diffusion is the process in which the molecules of a substance propagates from a region of higher concentration to region of lower concentration through a semi-permeable membrane.

diffusion rate = \frac{area}{time}

Given that; diameter = 15 mm, time = 15 minutes.

The dye spread in a circular form, so that;

area = \pir^{2}

r = \frac{diameter}{2} = \frac{15}{2} = 7.5 mm = 0.75 cm

area = \frac{22}{7} × (0.75)^{2} = 1.7679 cm^{2}

time = 15 minutes = 15 × 60 = 900 seconds

So that;

diffusion rate = \frac{1.7679}{900}

                      = 0.0019643 cm^{2}/s

Diffusion rate is 1.96 × 10^{-3} cm^{2}/s

7 0
4 years ago
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