Q: What determines sex in animals? Choices: - cell structure - ribosomes - cell density - sex chromosomes A:
sex chromosomes

Q: Which nerve carries electrical signals from the rods and cones to the brain? Choices: - auditory - neurotransmitter - axon - optic A:
optic

Q: What is the length of the route between two points? Choices: - speed - direction - velocity - distance A:
distance

Q: The body of the simplest sponges takes the shape of a cylinder with a large central cavity, called? Choices: - spicule - vacuole - spirogyra - spongocoel A:
spongocoel