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Brut [27]
3 years ago
12

In 1859, Charles Darwin proposed that differential survival and reduction of individuals would produce changes in species popula

tion over time. In other words, the environment acting on variation of individuals within a population would result in an adaptation (an evolutionary process that results in morphological, physiological or behavioral changes at the population level and that increases the probability of the members of that population to survive and their reproductive success). Using a specific example, explain how natural selection explains the theory of evolution. Also include in your explanation and within your example, what are the 4 factors needed for natural selection to act
Biology
1 answer:
Sergio [31]3 years ago
3 0

Answer:

Reproduction, heredity, variation in fitness or organisms.

Explanation:

Evolution occurs in organisms due to natural selection process because natural resources are limited. Evolution is the change in the characteristics of a species over several generations. If evolution occurs in the organisms so these evoluted organisms can survive rate more than those organisms where no evolution occurs because the evoluted organisms can adopt successfully the features of environment. Reproduction, heredity, variation in fitness or organisms are the four factors needed for natural selection to act.

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A single strand of DNA helix consists of 100 nitrogenous base pairs. On one strand, 36 of the bases are adenine and 24 are cytos
Katena32 [7]
Hello!

For the complementary strand of DNA, 36 Thymine bases and 24 Guanine bases would complete the proper base pairing. 

This is given by the concept of complementarity. A base in DNA has complementarity with only one other base. This complementarity is produced by hydrogen bond interactions.

For DNA, Adenine couples with Thymine and Cytosine couples with Guanine. So the 36 adenine bases will couple with 35 thymine bases, and so on. 

Have a nice day! 
7 0
4 years ago
Read 2 more answers
Vertical zonation shows that not only do different biomes occur at different latitudes, but also at different ______________.
sergejj [24]
<span>Vertical zonation shows that not only do different biomes occur at different latitudes, but also at different altitudes.
There are different ecological areas (biomes) at different heights on the Earth, not just different geological areas.
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5 0
4 years ago
The vestibular system is the only sensory system to send projection fibers directly to the cerebellum.
Greeley [361]

Answer: False

Explanation:

The above statement is false as, cerebellum receives the projection fibers from the other sensory system in which they are received in the different part of cerebellum. As, the cerebellum received the information from the sensory system and the spinal cords and also in the other part of the brain as it regulates in the movement of the motor.

3 0
4 years ago
Select the elements that are considered to have a relatively weak degree of electronegativity
kifflom [539]

Answer:

Hydrogen

Explanation:

Elements that have low ionization energies tend to have low electronegativities. The nuclei of these atoms don't exert a strong pull on electrons. Similarly, elements that have high ionization energies tend to have high electronegativity values. The atomic nucleus exerts a strong pull on electrons.

6 0
3 years ago
10 things we need clean water for? ​
laila [671]

Answer:

Take shorter showers.  A four-minute shower uses approximately 20 to 40 gallons of water.

2. Turn off the tap.  When washing your hands, turn off the water while lathering up. Turning off the water while you brush your teeth helps to save over 150 gallons of water a month. Turn off the shower while you wash your hair and you’ll save another 150 gallons a month!

3. Fill ‘er up. Always run a full load of laundry, but if you can’t, make sure you adjust the settings to the proper load size. If you’re in the market for a new washing machine, look into a front-loading model– most are energy and water-efficient, using just over 20 gallons a load. Most top-loading machines, unless they are energy-efficient, use 40 gallons per load.

4. Fix it but don’t forget it.  Leaks can add up to 5 gallons a day! Check for leaks on all your hoses, faucets and connectors– fix ‘em but make sure to keep checking for leaks throughout your house.

5. There’s no such thing as “waste water”.  When you give your pet fresh water, don’t throw the water down the drain, water your plants with it instead. While you’re waiting for your water to heat up in the shower or washing your fruit and veggies, collect the water and use it again elsewhere!

Outside

6. Re-route rainwater.  A rain barrel watering system is awesome, but you can also install gutters and downspouts, directing the rainwater to your trees and shrubs. This saves water and reduces runoff.

7. Use a broom to sweep your driveway and sidewalks.  Hosing down your driveway and sidewalks is wasteful and contributes to poor ocean water quality. Use a broom and dustpan instead.

8. Follow best lawn practices.  Drought-resistant landscaping is best but if you do have a lawn, let it go dormant in winter. You only have to water every three to four weeks, less if it rains (or snows). When mowing, raise your lawn mower to 1.5 to 2.0 inches. Tall grass shades roots and holds in more moisture than short grass.

9. Water wisely.  Water plants and grass at night or in the early morning to minimize evaporation. Water deeply and less frequently to encourage deep root growth and drought tolerance. Use a kitchen timer or your smart phone timer so you don’t overwater.

10. Plant an Ocean Friendly Garden.  In many homes, more than half of the water goes to maintain thirsty plants and grass. Plants adapted to your region’s climate and soil require a lot less water and maintenance, and could save you up to half of your household water use!

Explanation:

4 0
3 years ago
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