What does selectively permeable mean

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Answer 1
Answer: Definition of Selectively PermeableMembranes. All cells are enclosed with a cell membrane. A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport.
Answer 2
Answer: this mean the a cells cell membrane will selectivly let somethings through but not others.

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In _______ mimicry, unprotected species resemble others that are distasteful.

Answers

The answer is Batesian.

Why do deserts tend to form on land at latitudes of 20-30 degrees north and south?

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Answer:

Deserts can form even on tropical coasts beside cold ocean currents, such as the west coast of South America. The currents cool the air, which then rises and warms as it moves over land, drawing up moisture that is later precipitated as the air moves farther inland.

Which of the following would most likely happen if the epithelial cells in the stomach failed to produce mucus?Food leaving the stomach would only be partially digested.
Gastric juice would digest the stomach lining, resulting in ulcers.
Stomach pH would increase, resulting in acid reflux disease.
The cells would break down more slowly in order to protect the stomach.

Answers

Answer: Option B

Explanation:

The gastric juices helps in the digestion of the food but the pH of the these juices can affect the inner lining of the stomach if there would have no mucus secretion from the epithelial cells.

The low pH would have been destroyed the lining of stomach and this can result in the causing ulcer. To prevent this the walls of the stomach has epithelial cells that secretes sticky secretion known as mucus.

Gastric juice would digest the stomach lining, resulting in ulcers.

Mollusks like clams and snails have a simple heart that pumps _____ through open-ended vessels.blood
water
hemolymph
lymphocytes

Answers

Ans.

Mollusks are organisms of an invertebrate phylum mollusca. In these organisms, open circulatory system is present, in which a fluid-filled cavity (hemocoel) bathes different body organs to provide nutrients and oxygen.

Mollusks show a three-chambered, simple heart with two auricles and a single ventricle. The ventricle pumps hemolymph into the aorta, which is then transferred to the rest of the body organs.

Thus, the correct answer is option). 'hemolymph.'

 

The answer is Hemolymph.

Which of the following occurs when water is released (lost) during a reaction?A. catabolic synthesis
B. dehydration hydrolysis
C. catabolic hydrolysis
D. dehydration synthesis

Answers

The process that occurs when water is released (lost) during a reaction is D. dehydration synthesis.

This is because dehydration synthesis involves the removal of a water molecule in order to form a bond between two molecules. When water is released or lost during a reaction, it is a sign that dehydration synthesis has occurred.
Dehydration synthesis is a reaction in which two molecules are joined together with the removal of a water molecule. This process occurs when water is released (lost) during a reaction.

During this reaction, a covalent bond is formed between the molecules, and in the process, a water molecule is removed. This dehydration step gives the reaction its name.

In contrast, hydrolysis is a reaction that involves the addition of water to break down a larger molecule into smaller components. In hydrolysis, water is consumed or used in the reaction rather than released.

Therefore, when water is released during a reaction, it is associated with dehydration synthesis (option D).

Learn more about hydrolysis here: brainly.com/question/11461355

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EXPLAIN THE PERIODS CIRCLE .THANKS I DONT UNDERSTAND IT​

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A menstrual cycle begins with the first day of your period, or menstruation and starts over again when the next period begins. Throughout a monthly menstrual cycle, your body makes different amounts of chemicals called hormones to prepare for pregnancy.