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EastWind [94]
3 years ago
6

Darwin had very few fossils to support his theory of evolution by means of natural selection when he published On the Origin of

Species. Why are fossils considered essential for the study of biological evolution?
Biology
1 answer:
Rama09 [41]3 years ago
6 0

Answer:

Fossils plays an important role in the field of biological study. It is because it acts as key evidence for the evolution that has been occurring on earth since the time of origin of earth.

These fossils are valuable as they are found to be embedded in the sedimentary rocks of about millions and billions of years old. The study of these fossils enabled scientists to understand how life evolved from single-celled organisms to the present day complex organisms. The initially occurring organism was comparatively small and soft-bodied, and so are rarely found. But in today's world, the organisms existing are much different and structured in a well-defined pattern, and this helped in the understanding of the evolutionary pattern of life on earth and also explains the key factors that are responsible for the occurrence of evolution.

Thus, these fossils are considered to be very much essential for studying biological evolution.

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All the following rely on ATP as a source of energy except
JulsSmile [24]

Answer:

b. diffusion and osmosis across semi-permeable membranes

Explanation:

ATP (adenosine triphosphate) is a high energy carrying molecule in the system of living organisms. It posseses the ability to store and release energy for use by organisms during biochemical activities. However, some processes do not require ATP to occur and are called PASSIVE TRANSPORT while those that require energy (ATP) are called ACTIVE TRANSPORT.

In the above options, the processes listed as follows require ATP to occur:

- The active transport of glucose from the small intestine to the blood

- The movement of the flagella of sperm for motility

- Exocytosis of waste substances across a semi-permeable membrane

However, the diffusion and osmosis across semi-permeable membranes, which is a passive transport does not require ATP.

7 0
3 years ago
Which of the following represents a possible chromosome number of a species that uses sexual reproduction, and why?
Ann [662]

Answer:

B. 62, because this number will create a haploid cell, allowing both female and male gametes to be combined.

Explanation:

Sexual reproduction involves two organisms to come together (male and female). Sexually-reproducing organisms make use of a process called MEIOSIS to produce gametes or sex cells, which have a reduced number of chromosomes as the parent cells producing them.

A sexually reproducing organism must contain a complete diploid chromosome number (2n) that allows it to produce cells with a haploid chromosome number via meiosis. The haploid gamete cells that result from each meiotic divisions of male and female parents can combine to form a whole diploid organism.

3 0
3 years ago
please help me I need much help as needed thanks.) The dependent variable in this investigation is the (1) size of the test tube
ryzh [129]

(4) amount of protein digested

8 0
3 years ago
Which element does Lithium (Li) share more properties with, Beryllium (Be) or Sodium (Na)?
alexandr1967 [171]
The answer is C
because Lithium and sodium belong to the same column.
8 0
3 years ago
The cubic centimeter, which is often abbreviated as cc or cm3, is a metric unit for
vodka [1.7K]
It is a unit for volume.

Hope this helped.
6 0
3 years ago
Read 2 more answers
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