Volume is the measurement of
a. a line, extending from one point to another.
b. the space an object occupies.
c. the quantity of matter present in an object.
d. the degree of hot or cold of an object.
b
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H. V. Wilson worked with sponges to gain some insight into exactly what was responsible for holding adjacent cells together
He exposed two species of differently pigmented sponges to a chemical that disrupted the cell-cell interaction (cell junctions), and the cells of the sponges dissociated. Wilson then mixed the cells of the two species and removed the chemical that caused the cells to dissociate. Wilson found that the sponges reassembled into two separate species. The cells from one species did not interact or form associations with the cells of the other species. How do you explain the results of Wilson's experiments? A) The two species of sponge had different enzymes that functioned in the reassembly process. B) The molecules responsible for cell-cell adhesion (cell junctions) were irreversibly destroyed during the experiment. C) The molecules responsible for cell-cell adhesion (cell junctions) differed between the two species of sponge. D) One cell functioned as the nucleus for each organism, thereby attracting only cells of the same pigment.
As an individual grow fatter, further weight gain is minimized by diet-inducing _________.
Fill in the blank(s) with the appropriate word(s).
Preservatives such as citric acid are added to foods to interfere with bacterial growth. This creates an acidic pH in the food. Why does this affect the bacteria that are present?
A) An acidic environment causes bacterial enzymes to fail or work less efficiently. B) An acidic environment increases the activation energy more quickly in bacteria. C) An acidic environment encourages endergonic reactions in the bacterial cells. D) An acidic environment causes the bacteria to grow more rapidly.
What is the probable origin of members of the Alu family of repetitive sequences in the human genome?
What will be an ideal response?