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sdas [7]
3 years ago
13

Answer all 20 and I can give you brainliest

Biology
1 answer:
ExtremeBDS [4]3 years ago
5 0

Answer:

1.(D)

2.(D)

3.(C)

4.(B)

5.(B)

6.(C)

7.(B)

8.(D)

9.(A)

10.(africa)

11.(D)

12(B)

13(?)Convergent boundaries

14(C)

15(A0

16(​Sturdy Desks and Tables. The safest place to perform the 'duck, cover, and hold' action is under a sturdy desk or table. ...

Bed or Closet. When you are in bed during an earthquake, stay there. ...

A Room with No Windows. Stay away from glass windows during an earthquake. ...

Door Frame. ...

Outside your Home.

So C?

17(C)

18(D)

19(B or A)

20(B)

Extra credit question

Earth is special because it is an ocean planet. Water covers 70 percent of Earth's surface. Earth's atmosphere is made mostly of nitrogen and has plenty of oxygen for us to breathe.There are multiple reasons for earth to be a special planet. Reasons are as follows

1.Earth is the only planet known where intelligent life exist.

2.It lies in the circumstellar habitable zone (CHZ). CHZ is defined in the image given below.

3. Earth has a unique magnetic field which protects the earth from the harmful solar winds. These solar winds played a role in transforming venus into hell.

4. Earth has Van Allen radiation belts which protects it from cosmic rays.

5. Our large neighbour Jupiter protects is from many comets and asteroids that come from the keiper belt and Oort cloud.

6. Earth's atmosphere is favorable to support life on earth. This atmosphere consists of different gases in adequate amount. If the percentage of gases would differ then life on earth may face serious consequences.

7. Tectonic plates of earth differentiates it from most other planets.

8. Earth has a solid crust unlike the gaseous planets.

9. Earth has been gifted with a medium sized star which release solar winds and protect us from the harmful radiation of outer space.

Brainliest?

Explanation:

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The resistance to the pesticide in insects occurred because
Gemiola [76]

Answer:

The correct answer is option B. favorable change in DNA of the insect.

Explanation:

At the point when a pesticide is first utilized, a little extent of the pest population may survive to introduction to the material because of their particular hereditary or genetic makeup. These surviving individuals pass along the gene resistance to particular insecticide or pesticide to next generation.

Upon introduction to pesticides, insects that don't have the resistance die eventually, in this manner permitting the insects with the resistance genes to endure and reproduce,creates more resistance insects.

Thus, the correct answer is option B. favorable change in DNA of the insect.

8 0
3 years ago
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In a hypothetical population of plants, flower color is determined by a single gene with two alleles. In a population of 500 pla
Dvinal [7]

Answer:

Phenotype genotype Number of individuals

Red RR 245

Pink Rr 210

White rr 45

Number of alleles in total

R = 245 + 245 + 210 = 700 ---> 700/1000= 0.7 R frequency

r = 210 + 45 + 45 = 300 -----> 300/1000 = 0.3 r frequency

Predict (Hardy Weinberg) genotype frequencies=

p^2 + 2pq + q^2 = 1

p= 0.7

q=0.3

0.49 + 0.42 + 0.9 =1

According Punnett Squares in F1 we have=

Rr* rr = Rr 50% and rr 50%

4 0
3 years ago
⦁ What technique can be used as the first step to identifying bacteria?
murzikaleks [220]

Answer:

Isolating a single bacterium species is the first step in identifying the bacteria possibly responsible for a disease process.

Explanation:

6 0
3 years ago
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Navah writes out the chemical equation for photosynthesis. She includes two reacting molecules to the left of the arrow and two
Nadya [2.5K]
A. light energy, above the arrow

<span>Photosynthesis is a process wherein light energy is converted into chemical energy. </span>
Components of photosynthesis:
Water
Carbon Dioxide
Light energy, mostly from sunlight, is the main requirement for photosynthesis to occur. 


6 0
3 years ago
How many alleles does an organism inherit from each parent?
Bingel [31]

Answer:

ONE

Explanation:

5 0
3 years ago
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