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Zanzabum
3 years ago
11

The two dna strands run in opposite directions. what vocab word describes this orientation?

Biology
1 answer:
Simora [160]3 years ago
6 0
2<span>. the amount of G = the amount of C (pairing ratio of 1:1) c. the hydrogen bonds hold the molecule in its defintive shape. Complementary bases</span>
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How specialized structures increase the probability of successful reproduction in the plants, and factors that affect their grow
nikklg [1K]

Answer:

Specialized structures such as

1. The brightly colored flowers attract insects that transfer pollen from the anther to the stigma of another plant.

2. The scented smell of flowers and their nectars also attract insect and other pollinators to them.

Explanation:

Reproduction refers to the way by which plants and animals produce offspring or their types. Pollination, which is the transfer of pollen grains from the anther to the stigma of the same or another flower is a vital way by which plants accomplish this.

Structures of plants such as their brightly colored flowers, the nectars produced by them, as well as their characteristic smells attract pollinators to them that, in turn, aid reproduction.

7 0
3 years ago
Why do leaves appear green?
s2008m [1.1K]

<u>Answer:</u>

The correct answer option is B. Green wavelengths are the least used in photosynthesis.

<u>Explanation:</u>

Plants have a pigment in them called as chlorophyll. This chlorophyll is able to absorb only certain wavelengths of the light within the light spectrum.

From that visible light spectrum, chlorophyll is only able to absorb light of red and blue wavelength. The green light is not absorbed by the by chlorophyll as it is reflected back.

Therefore, this reflection of green light makes the leaves to appear green.

6 0
3 years ago
Read 2 more answers
What elements are found in the human body? Give 3 examples (don’t give them complicated)
Vedmedyk [2.9K]

Answer:

hydrogen, oxygen, carbon and nitrogen

I did 4 instead :')

Explanation:

6 0
3 years ago
The concept of __________ means that because of their genetic makeup, individuals differ in their responsiveness to qualities of
Leni [432]

Answer: Behavioral genetics

Explanation: This concept indicates that our genes influence our environment and in return, the environment influences our genes. Behavioural genetics has therefore expressed gene-environment interactions on the behaviour of an individual.

3 0
3 years ago
List and explain the 3 paths natural selection can take.
evablogger [386]

Answer:

1. Stabilizing Selection  

2. Directional Selection  

3. Disruptive Selection  

Explanation:

Stabilizing Selection  

This type of natural selection occurs when there are selective pressures working against two extremes of a trait and therefore the intermediate or “middle” trait is selected for. If we look at a distribution of traits in the population, it is noticeable that a standard distribution is followed:

Example:  For a plant, the plants that are very tall are exposed to more wind and are at risk of being blown over. The plants that are very short fail to get enough sunlight to prosper. Therefore, the plants that are a middle height between the two get both enough sunlight and protection from the wind.

Directional Selection  

This type of natural selection occurs when selective pressures are working in favour of one extreme of a trait. Therefore when looking at a distribution of traits in a population, a graph tends to lean more to one side:

Example: Giraffes with the longest necks are able to reach more leaves to each. Selective pressures will work in the advantage of the longer neck giraffes and therefore the distribution of the trait within the population will shift towards the longer neck trait.

Disruptive Selection  

This type of natural selection occurs when selective pressures are working in favour of the two extremes and against the intermediate trait. This type of selection is not as common. When looking at a trait distribution, there are two higher peaks on both ends with a minimum in the middle as such:

Example: An area that has black, white and grey bunnies contains both black and white rocks. Both the traits for white and black will be favored by natural selection since they both prove useful for camouflage. The intermediate trait of grey does not prove as useful and therefore selective pressures act against the trait.

6 0
3 years ago
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