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3 years ago

How are selective breeding and natural selection similar how are they different?

1 answer:

7 0

Selective breeding and natural selection are similar because they are both giving certain traits to offspring.
DIFFERENCE:
natural selection-Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
selective breeding-Selection by humans for breeding of useful traits from the natural variation among different organisms

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Silicate minerals polymerize to form a variety of structures. three-dimensional structures have ________ silicon than those comp

Ksenya-84 [330]

The three-dimensional compositions have more silicon in comparison to those composed of independent tetrahedra.

The silicate minerals refer to the most general of Earth's minerals and involve feldspar, quartz, mica, pyroxene, amphibole, and olivine. On the other hand, the silica tetrahedra composed of oxygen and silicon, produce sheets, chains, and frameworks, and bonds with other cations to produce silicate minerals.

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3 years ago

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You are given a 1 liter bacterial culture in exponential stage of growth. The generation time of the bacteria is known to be 30

nydimaria [60]

Answer:

Option-A

Explanation:

A bacteria divides by binary fission which divides a parent bacteria into the two daughter cells and generation time refers to the average time difference between two consecutive generations.

The bacterial cell grows by the exponential function that is by $2^{number of generation}$ x initial population of bacteria.

In the given question,

Initial population

the initial population of bacteria - 2x 10³ per ml

So per liter, the bacterial population will be 2 x 10 ⁶

Generation time

1 generation time of bacteria is 30 min.

so 5 hours will have-   $\frac{300}{30}$ = 10 generations

New bacterial population

Using formula $2^{number of generation}$ x initial population of bacteria

$2^{10}$ x (2 x 10⁶)

= 1048 x (2 x 10⁶)

2048 x 10⁶

Thus, Option-A is the correct answer.

4 0

3 years ago

QUESTION 1

Paladinen [302]

Answer:

1. RNA

2. Cytosine and guanine

3. RNA

4. Replication

5. Unwinding the double helix

6. DNA polymerase

7. Identical

8. Repair the DNA

9. Changes in nucleotides of a DNA molecule that affect the genetic message

10. The gene for beta-galactosidase turns off.

11. p53

12. A part of DNA that does not code for a functional protein

13. Proteins

14. Transfer RNA

15. The making of an RNA molecule from a DNA strand by pairing of bases of RNA nucleotides with the complementary bases in DNA

16. 3

17. Tertiary

18. Enzymes

19. The reaction slows down.

20. The active site of an enzyme

21. 60%

22. Conserved energy

23. different

24. Gene expression

I hope that this helps you !

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3 years ago

Predators are found in grasslands because.... *

IgorLugansk [536]

herbivores ate numerous

7 0

3 years ago

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In a science class students water a plant with the same amount of water each day for 28 consecutive days if the students use a t

Phantasy [73]

Answer:

The correct answer would be 0.85 liters.

It can be explained with the help of unit rate that is, when the rate is expressed as the quantity of 1 for example, 5 meter per second, 5 liters per day et cetera.

In this case, unit rate (liter per day) can be calculated by dividing the total amount of water used by total number of days.

Amount of water used in 28 days = 23.8 liters

The amount of water used in one day = $\frac{23.8}{28}$

It comes out to be 0.85 liters per day or 850 milliliter per day.

4 0

3 years ago

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