BIOLOGY HIGH SCHOOL

The head of a phospholipid is made of an alcohol and

Answers

Answer 1
Answer:

The head of a phospholipid is made of an alcohol and phosphate group.

What is phospholipids?

  • Phospholipids are a subclass of lipids that have two hydrophobic "tails" made of fatty acids connected by an alcohol residue. Their hydrophilic "head" contains a phosphate group (usually a glycerol molecule).
  • Omega-3 fatty acids EPA and DHA are frequently incorporated into the phospholipid molecule of marine phospholipids. Simple organic compounds like serine, ethanolamine, or choline can modify the phosphate group.
  • All cell membranes include phospholipids, which are an essential element. Due to their amphiphilic nature, they can form lipid bilayers.
  • For several reasons, including higher bioavailability, decreased toxicity, and greater permeability across membranes, phospholipids have been frequently employed to make liposomal, ethosomal, and other nanoformulations of topical, oral, and parenteral medicines.
  • In addition to mixed phospholipid chains with surfactant characteristics, liposomes may also include phospholipids that are phosphatidylcholine-enriched.

Learn more about the Phospholipids with the help of the given link:

brainly.com/question/20561742

#SPJ2
Answer 2
Answer:

Answer:

The head of a phospholipid is made of an alcohol and glycerol group

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Squamous cell carcinoma and basal cell carcinoma are both cancers of cell tissue of the skin, lining of the blood vessels, respiratory, intestinal, urinary tracts, and other body systems. These carcinomas are found in what type of tissue?

Answers

Explanation:

A carcinoma is a type of cancer that develops from epithelial cells, specifically, a carcinoma is a cancer that begins in a tissue that lines the inner or outer surfaces of the body, and that arises from cells that originate in the endoderm , mesoderm and ectoderm, which are the germ layers during embryogenesis. Carcinomas occur when a cell's DNA is damaged or altered and the cell begins to grow uncontrollably and becomes malignant. It is derived from the Greek, καρκίνωμα, karkinoma, which means pain, ulcer or cancer (derived from karkinos meaning crab).

The two main groups of carcinomas are squamous cell carcinomas and adenocarcinomas.

Carcinomas are the most common type of cancer.

Common places of carcinomas are the skin, mouth, lung, breast, digestive tract and uterus.

Which of the following is NOT a vascular tissue in a plant?xylem

phloem

parenchyma

none of the above

Answers

Parenchyma is the answer because whereas the other two, xylem and phloem are vascular tissues, parenchyma is a packing tissue.

Differences between DNA and RNA include which of the following? (1) RNA consists of one nucleotidechain. (2) RNA contains the nitrogen base uracil instead of thymine. (3) RNA contains the sugar ribose
instead of deoxyribose.
a. 1, 2, and 3
b. 1 and 2
c. 2 and 3
d. 2 only

Answers

A is the correct answer.

Answer:

i think it's A

Explanation:

Which of the following is an example of an endothermic process?Condensing

Freezing

Boiling

Solidifying

Answers

The answer is probably Boiling.

Endothermic process or reaction refers to the system in which the heat energy is absorbed from the surroundings. In boiling, the evaporation of the liquid water is an example of an endothermic process. Other examples are photosynthesis, the melting of ice, and cracking of alkanes.

Humans are not the only animals that pollute the air. TRUE OR FALSE

Answers

TRUE

Pollution can be defined as the introduction of biological matter, particulate and chemicals that are harmful to humans, plants and animals. pollution can also cause damage to natural environment. However, animal digestion can cause natural air pollution by releasing methane which is a greenhouse gas.

Answer: True

Explanation: Human beings pollute the air by undergoing several activities like burning of fossil fuels, combustion of the fuels by the automobiles, emission of hazardous gases from industrial and agricultural wastes. But human beings are not only responsible for this pollution but animals like cattles (cow, baffallo) excreate a large amount of dung which is a source of greenhouse polluting gas called as methane.

Use the diagram of Earth to match each letter to its description.A. The equator
B. A woman walks in a straight line with the sun to her right at nine o'clock in the morning. Toward which pole does she walk?
C. A man walks in a straight line with the sun to his right at three o'clock in the afternoon. Toward which pole does he walk?
D. A line of longitude

Answers

A. The equator
The line in the center which divides the Earth into Northern Hemisphere and the Southern Hemisphere.

B. A woman walks in a straight line with the sun to her right at nine o'clock in the morning. Toward which pole does she walk?
I  think the woman is walking towards the north pole.

C. A man walks in a straight line with the sun to his right at three o'clock in the afternoon. Toward which pole does he walk?
I think the man is walking towards the south pole.

D. A line of longitude
The longitude are vertical lines parallel to the Prime Meridian.

Woman walks in a straight line towards the north pole. In the morning the sun is in the east.

At night the sun is in the west therefore the man is walking to the south pole.

Equator is the termed as the line of latitude.

A line of longitude is known as the vertical lines which are parallel to the prime meridian.
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