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3 years ago

What is a sharks' skin made of?

1 answer:

3 0

Shark skin is made of a matrix of tiny, hard, tooth-like structures called dermal denticles or placoid scales. These structures are shaped like curved, grooved teeth and make the skin a very tough armor with a texture like sandpaper.

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What general type of mutation has the greatest effect on the protein produce

Lyrx [107]

Answer: The most serious of these mutations will be the insertion of 2 bases. Becasue the genetic code is read in triplets, a 2 base insetion will alter the reading frame of the code causing a frameshift mutation meaning every amino acid after the site of the mutation will be incorrect.

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3 years ago

What is a photon ghfffffffffffftktktktktktktktktktktktktktktktktktkg

Andrews [41]

A particle that releases light- respond if you want a more detailed explination

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3 years ago

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Which form of energy is in firewood? light sound kinetic potential

Mashutka [201]

Answer: Stored potential energy

Explanation:

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3 years ago

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Please help me solve this answer!?

diamong [38]

Answer:

i think the answer is the tempereature and plz correct me if i m wrong

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2 years ago

In observing epithelial cells under a microscope, the cells are arranged in a single layer and look tall and narrow, and the nuc

KonstantinChe [14]

Answer:

Tall, narrow cells arranged in a single layer correspond to a simple columnar epithelial tissue.

Explanation:

According to the arrangement of cells, epithelial tissues can be classified as:

- Simple epithelium, formed by a single cellular layer which is in contact with the basement membrane

- Stratified epithelium, formed by two or more cellular layers. The cellular shape and high vary from one layer to the other. In classification, only the superficial layer is considered.

- Transitional epithelium. In this case, the epithelial cells vary in shape and size allowing the tissue to stretch.

Classification of epithelial tissues according to the cell shape:

- Squamous epithelium: Epithelial cells are flat and thin. Their nucleus is narrow and centered. This epithelium can be found in endothelium, mesothelium, pericardium, and peritoneum.

- Cuboidal epithelium: Epithelial cells are cubic shaped: their width, length and high are about equal. Their nucleus is rounded and centered. This epithelium can be found in kidney tubules, Malpighi tubules, thyroid gland, salivary glands, and pancreas.

- Columnar epithelium: Epithelial cells are tall, rectangular and/or column-shaped, longer than width. Their nucleus is ovoid and near to the base. This epithelium can be found in the stomach, intestine, duct of glands, Fallopian trumps, etc. Their functions are related to secretion, absorption, protection, motility.

Types of epithelium tissue:

- Simple squamous epithelium

- Simple cuboidal epithelium

- Simple columnar epithelium

- Stratified squamous epitheliums

- Stratified cuboidal epitheliums

- Stratified columnar epitheliums

- Transitional epithelium

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3 years ago