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guapka [62]
3 years ago
11

The diagnostic feature of chondrichthyes is _____.

Biology
1 answer:
jonny [76]3 years ago
3 0
An endoskeleton of calcified cartilage
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Describe the structure and the function of the stomach. Be sure to include cells and tissues relating to this organ.
Vikentia [17]

Connective tissues support the tissues of the mucosa and connect it to the muscularis layer.

The blood supply of the submucosa provides nutrients to the wall of the stomach. Nervous tissue in the submucosa monitors the contents of the stomach and controls smooth muscle contraction and secretion of digestive substances.

<h3>What is the function of the stomach?</h3>

The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach.

The stomach muscles contract periodically, churning food to enhance digestion. The pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.

Thus, this could be the answer.

To learn more about stomach click here:

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8 0
2 years ago
Which characteristics distinguish a law from a<br> theory? Check all that apply
BigorU [14]
A theory is an idea that has yet to be proven by experimentation. A law is a theory that has been proven correct.
3 0
2 years ago
An atom has an atomic number 17 and atomic mass number 35. How many neutrons are present in its nucleus?
Pie

Answer:

B. 18

Explanation:

An atom, which is the smallest indivisible particle of matter, further contains certain particles called SUB-ATOMIC PARTICLES namely: proton, neutron and electron. In a neutral/uncharged atom, the number of proton is equal to the number of electrons. The number of protons in an atom represent its ATOMIC NUMBER.

However, the sum of the proton number and neutron number gives the MASS NUMBER i.e. mass no. = proton no. + electron no.

Hence, according to this question which states that an atom has an atomic number of 17 and a mass number of 35. The neutron no. can be calculated as follows:

Neutron no. = mass no. - proton no.

Neutron no. = 35 - 17

Neutron no. = 18

8 0
3 years ago
Read 2 more answers
Glucose is a simple sugar made up of carbon, hydrogen, and oxygen. What kind of molecule is glucose?
motikmotik
Glucose is a simple monosaccharide sugar molecule with a chemical formula C6H12O6.
6 0
3 years ago
What directs and controls a animal cell activities?
DaniilM [7]
"Nucleus" (Genetic Material in it) <span>directs and controls a animal cell activities

Hope this helps!</span>
7 0
3 years ago
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