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3 years ago

Scientific explanations are accepted when

Biology

1 answer:

Stolb23 [73]3 years ago

3 0

ANSWER:

Scientific explanations are accepted when there is sufficient evidence to prove them right. In addition, scientific explanations must be logical to be acceptable and must match as much evidences as possible.

EXPLANATION:

Scientific explanations explain something about the natural world by making use of observations and measurements.
These are usually tentative proposals that need to be verified or proved to be true.
The observations and measurements must prove the scientific explanation to be true or must support it so that it becomes acceptable.

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Monocots typically have leaves with _________ veins and flowers with ______ parts per whorl.

ivann1987 [24]

Monocots have distinct structural features. Leaf veins of the monocots are parallel. Flower parts are in multiples of three per whorl. Stems have no pith region. Other characteristics of monocots are: its embryo is with a single cotyledon and its pollen is with single pore.

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2 years ago

In a population, surrounded with dark gray rocks, there lived 2 types of beetles, a gray beetle and a white beetle. In the start

Svetlanka [38]

Directional selection favors one of the extreme phenotypes over the other one. Option C is correct. Natural selection is the evolutive force, and 0.40, 0.40, and 0.20 are the new genotypic frequencies.

<h3>What is directional selection?</h3>

Directional selection is one type of natural selection. Let us remember that natural selection is an evolutive force.

Directional selection increases the proportion of individuals with an extreme phenotypic trait.

There must be a selective pressure or environmental pressure acting on populations to lead the species to increase the number of individuals expressing that extreme phenotype.

This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.

In the exposed example,

two original phenotypes ⇒ gray and white
substrate color ⇒ dark gray rocks
environmental pressure ⇒ birds preying on beetles

- Grey beetles managed to camouflage with rocks since their gray color was similar.

- White beetles were exposed on the dark gray rocks, so they were easily seen by birds.

- Predation by birds was an environmental pressure that had a stronger influence on the white phenotype.

Natural selection favored gray-colored beetles, who could survive and reproduce.

Assuming a diallelic gene expressing complete dominance codes for beetles color, we can suggest that the frequency of one of the homozygous genotypes increased, while the other decreased to near cero. Heterozygous individuals kept the allele coding for the white phenotype.

Among the options, C is the correct one. Natural selection is the evolutive force, and 0.40, 0.40, and 0.20 are the new genotypic frequencies.

You can learn more about natural selection and directional selection at

brainly.com/question/9830102

brainly.com/question/12226774

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2 years ago

What did Mendel's cross pollination of pea plants prove

pashok25 [27]

Answer: The correct answer is- D certain factors are dominant and other factors are recessive.

Mendel was interested in knowing the offspring that is produced from the cross pollination (that is from two different plants) as he wanted to study different traits of pea plant.

For doing so, he first removed the anthers of one plant (to prevent self pollination) and then transferred the pollens of one plant into the stigma of another plant.

When he allowed the cross pollination of purebred pea plant with other plant, he observed that some factors are dominant (such as tall height of pea plant, which masks the expression of recessive factors) and other are recessive (such as dwarf height of pea plant).

Thus, option D) is the right answer.

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How do plants regulate water loss due to transpiration?

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Complete the flowchart to identify the process by which blue-light photoreceptors and auxin control phototropism in plants.

DaniilM [7]

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