A sea urchin egg is treated with an inhibitor that prevents the rise in intracellular Ca2+ right before fertilization. Which of the following events would be blocked by addition of this inhibitor? Choose one or more:A. formation of vesicles under the plasma membraneB. exocytosis of hydrolytic enzymesC. fertilization envelope rising from the cell surfaceD. entry of multiple sperm into the cell

What macromolecule is produced during translation? a. carbohydrate b. rna c. dna d. protein

To store strawberries in sugar syrup, lucy placed them in a jar and covered them with sugar but did not add any water. do you think syrup will be formed? justify. a. no. since water is not added, there cannot be any syrup formation. b. no. the higher concentration of sugar on the outside will cause the water from the sugar to diffuse in the strawberry cells causing them to swell without formation of any syrup. c. yes. the higher concentration of sugar on the outside will cause the water from the strawberry to diffuse out resulting in syrup formation. d. yes. the sugar will melt over time and form the syrup.

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.