Requires the blackworms to incubate 2 min in the test solution. If the worms were accidentally incubated for 4 min, how would the results be affected?

a. The results would not be affected since the test chemicals are known to not affect the pulse rate of blackworms.
b. The results would not be affected since an incubation time of 2 min is simply a time-saving device.
c. The pulse rate would be markedly increased due to excessive absorption of the test solution.
d. The pulse rate would be severely depressed or absent due to death of the worms.

Every compound can be represented by a chemical formula. a chemical formula is the set of symbols showing the elements that make up a compound and their proportions. water’s chemical formula is h 2 2 o. that means a molecule of water contains two atoms of hydrogen and one atom of oxygen chemically bonded. a molecule is a group of two or more atoms bonded together. molecules can range in size from two to thousands of atoms. a molecule of a compound is the smallest unit of that compound. every molecule of water has all the physical and chemical properties of water. that’s because every molecule of water is made of the same elements in the same proportions: two hydrogen atoms and one oxygen! which of the following is a true statement? a every molecule of the same compound will have different properties. b every molecule of a compound has the same proportion of elements. c molecules can be physically separated into smaller units of a compound. d molecules cannot be represented by chemical formulae.

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

What type of competition exsist between two species. turtles and fish