All categories

3 years ago

What are the three main ways that common ancestry may be shown through homologies

Biology

1 answer:

Harrizon [31]3 years ago

6 0

Answer:

Homology is a study of similar characters found in two species because of common ancestry.

Explanation:

1.Morphological homology: Species placed under same taxonomic category exhibit similar anatomical structures.

2.Ontogenetic homology: Species belongs to same taxonomic category embryological similarities

3.Molecular homology: Species show molecular similarities such as DNA,RNA and protein

An example of homology is seen in the skeletal strycture of vertebrates. That is arm of a human,leg of a cat,fin of a whale and wing of a bat.

Download docx

You might be interested in

What is an example of a negative stain?

muminat

Answer:

dyes used in negative staining have an. acidic chromagen (negatively charged chromophore) Examples of negative stains. NIgrosin and eosin. heat fixing smears can.

6 0

3 years ago

Read 2 more answers

Mrs. Gibbs cannot seem to catch up with the eating habits of her 14-year-old daughter Zondra and 16-year-old son Austin. Her wee

Alex787 [66]

Answer: The answer is 2200 calories per day for Zondra and 3000 per day for Austin

Explanation:

The options are;

a. 1800 calories per day for Zondra and 2200 per day for Austin

b. 2200 calories per day for Zondra and 3000 per day for Austin

c. 2400 calories per day for each of them

d. 2000 calories per day for each of them

The answer is option B -2200 calories per day for Zondra and 3000 per day for Austin

Calories provide energy which we use to perform daily activities. The calories derived from food allow us take part in important activities and leisure. Calorie needs are often higher during teenage years because it is the time of rapid growth.

Austin, is her 16 year old son. The recommended calorie needs for adolescent males between the ages of 16- 18 are; 2,400 calories for non active adolescents, 2,800 calories for moderately active adolescents and 3200 calories for active adolescents.

Zondra is a 14 year old female adolescents. The recommended needs for adolescent females between the ages of 14-18 are; 1,800 calories for non active adolescent females, 2,000 calories for moderately active and 2,400 calories for active adolescent females.

Option B, 2200 calories per day for Zondra and 3000 per day for Austin fall within the range

3 0

3 years ago

Proteins are called the building blocks of the body. They’re needed for growth and development and to repair the normal wear and

Iteru [2.4K]

The order of steps for the digestion of proteins will be;
In mechanical digestion, the teeth grind food and break it in to smaller parts.
Churning and the enzyme pepsin break down protein in the stomach
The pancreas releases enzymes trypsin and chymotrypsin
Tryspsin and chymotrypsin act on the proteins to break them down in the duodenum
Amino acids are absorbed by the capillaries in the Jejunum and lastly
The amino acids enter the blood stream and are circulated throughout the body.

3 0

3 years ago

Pepsin, an enzyme that is found in the stomach of humans, functions in breaking down proteins. It is denatured as it travels to

AnnZ [28]

Answer:

A. pH

Explanation:

Denaturation of proteins is a protein whereby the protein molecule loses its primary structure and ultimately its physical functioning as a result of factors including pH, temperature or concentration of chemicals. Based on this definition, it is visible that denaturation of proteins can be caused by these three factors: pH, chemical and temperature.

However, in this case of PEPSIN enzyme, which is a proteinous molecule produced in the stomach of humans and functions in breaking down proteins, its denaturation occurs as it moves along the digestive tract to the intestines. This is as a result of the changes in pH in the digestive tract.

The pH of the stomach where pepsin is produced is acidic i.e. <3.0. However, as one moves towards the intestine, the pH increases, which is unfavorable or considered harsh for the pepsin enzyme. Hence, it gets denatured.

7 0

3 years ago

Pls help due today, would be greatly appreciated.

lara31 [8.8K]

For the first 2 rows it’s going to be the dominant phenotype. So “purple flowers” for the 1st and 2nd row and white flowers for the last one. For the first row on #17 it’s going to be “FF “and “ff” for the 2nd. Tongue roller is “TT” and non tongue roller is “tt.”

6 0

3 years ago