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3 years ago

Which are similar structures shared by different

Biology

1 answer:

ludmilkaskok [199]3 years ago

7 0

Answer:

The correct option is D) homologous structures

Explanation:

In evolutionary studies, a homologous structure can be described s a similar structure which is present in different species. This is because these spices might have a common ancestor in the past. For example, the forelimbs of humans and bat. They perform different functions but their structure is similar. They are also derived from the same embryonic origin. These similarities show that the bats and humans might have shared a common ancestor in the past.

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Glucose is not our only food source, nor the only one we can utilize in our bodies to generate energy. other primary sources of

notsponge [240]

They're converted to 'Acetyl- CoA'

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8 0

4 years ago

4. A male green parakeet breeds with a female blue parakeet: All the offspring are green. What trait is

Harman [31]

Answer:

4. Green

5. 1 Green : 1 Blue parakeet

6. 100% green offsprings

7. Violet color

8. 0%

9. 1 Yellow : 1 white sulfur butterflies

Explanation:

4. A dominant trait is that which masks the phenotypic expression of its contrasting trait in a gene. Hence, the cross between a green and blue parakeet produced offsprings that were all green because the green trait is dominant i.e. mask the expression of the blue trait.

5. An heterozygous green parakeet will have genotype:Gg while a homozgous blue parakeet will have genotype: gg. A cross between Gg and gg will produce offsprings with genotypes: Gg and gg in the proportion 2:2. This means the phenotypic ratio of Gg (green) and gg (blue) is 1:1.

6. A homozygous dominant parakeet means genotype, GG while a heterozygous green parakeet means genotype, Gg. GG and Gg, if crossed will produce offsprings with genotypes: GG, GG, Gg and Gg. Since the allele for green color (G) is dominant over the allele for blue color (g), all the offsprings i.e 100% will be green colored.

7. A purebred flower means a flower that produces only one type of color and is homozygous. Hence, let's say a purebred red flower will have genotype RR while a purebred violet flower will have genotype VV. Hence, these two purebreds will be crossed to produce offsprings that all possess genotype, VR. According to the question, they are all violet. This means that the allele for Violet color is masking the phenotypic expression of the red color. Hence, the Violet color is a dominant trait.

8. A homozygous Violet and red flower will have the genotypes: VV and RR respectively. A cross between them will produce an offspring with genotype, VR. Since the Violet allele is dominant, it will be phenotypically expressed over the red allele. Hence, none of the offsprings i.e. 0% will be red-colored.

9. A heterozygous sulfur butterfly will be Yy while a homozygous recessive sulfur butterfly will be yy. Where Y is yellow allele and y is white allele. If Yy and yy are crossed, offsprings with genotypes Yy and yy will be produced in the ratio 1:1. This means that the phenotypic ratio of the cross between a heterozygous sulfur butterfly (Yy) and a homozygous recessive sulfur butterfly (yy) is 1 Yellow sulfur butterfly: 1 white sulfur butterfly.

3 0

3 years ago

When a tastant enters the mouth, what are all the structures it passes on its way to

Bond [772]

The information given about taste and the tongue is explained below.

<h3>How to explain the tongue?</h3>

The food enters the mouth passing the TOT (tip) of the tongue. It is moved around by the motion of the tongue and teeth as the food is chewed. Its movement is facilitated by the taste buds on the tongue which are jagged, aiding in their ability to move food.

Fungiform papillae on the side of the tongue and filiform papillae located on the dorsal surface of the tongue come in contact with the tastant.

Both types of papillae have taste buds that have receptors for individual tastes -sweet, sour, salty umami (savory), and bitter. Once a tastant is bound to the receptor it creates a signal that travels through one of the three carnival nerves depending on the location of the taste buds. For taste buds located on the front of the tongue, the signal travels through the facial nerve.

For taste buds located in the middle of the back of the tongue, signals travel through the glossopharyngeal nerve. The signals travel to the nucleus of the solitary tract of the brainstem, where they are relayed to the thalamus for higher processing.

Learn more about tongue on:

brainly.com/question/480853

#SPJ1

5 0

2 years ago

Which of the following best describes the significance of the TATA box in eukaryotic promoters?

ankoles [38]

Answer:

The correct option is A.

Explanation:

TATA box refers to a non coding sequence of DNA that is found in the promoter regions of eukaryotic genes. The TATA box serves as the binding sites for certain proteins and some transcriptions factors in eukaryotic genes; it signifies the points where transcription begins. Transcription is the process by which the genetic information in DNA is replicated into an mRNA. This is the first step in protein synthesis. The name TATA was derived from the nucleotide bases that are always present in large number a the site. T stands for thymine while A represents the adenine base.

8 0

3 years ago

Match each nutrient or food to the correct process during which alcohol alters its nutrient status by selecting the process from

Misha Larkins [42]

Answer:

Alcohol is not good for the health of the person as a person who is taking alcohol is perhaps not eating food rich in nutrients.

The micro nutrients such as zinc, potassium and calcium are excreted out of the body as an effect of alcohol in the body.

The vitamins like A and vitamin D are metabolized inside the body of the organism.

Apples and broccoli are ingested inside the body. In the effect of the alcohol the absorption of Vitamin B-12 thaimine, iron and folate increases.

4 0

4 years ago