Explanation:
Water can act as an acid and a base. As an acid, water donates H+, the hydrogen ion. As a base, water donates OH-, the hydroxide ion
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A hydra removes undigested food by pulling the food out with it's tentacles.
Depending on the organism the number of chromosomes in a cell may change.
Different organisms have a different number of chromosomes, for example we have 46 and a fruit-fly(drosophila melanogaster) has 8.
Answer: Because they produce gloucose by photosynthesis
Explanation:
There contain chlorophyll which allows them to undergo photosynthesis
Answer: The correct answer is A. Molecules are moving against a concentration gradient.
Active transport is a process in which molecules move from a medium of low concentration gradient to a medium of high concentration gradient across the cell membrane. Since molecules move against the concentration gradient, therefore, this process requires energy.
Active transport is primarily divided into two types-
Primary active and secondary active transport.
In primary active transport, metabolic energy is used directly ( Example- hydrolysis of ATP)
In secondary active transport, energy is utilized by the movement of one molecule along the concentration gradient. This movement is coupled with another molecule, which moves against the gradient.
