Gas exchange in an echinoderm takes place through

A. book lungs.

B. skin gills.

C. lungs.

D. none of the above.

A statement of cause and effect that can be used to set up a test for a hypothesis is called an

Among the products of glycolysis, which compounds contain energy that can be used by other biological reactions? a) ATP onlyb) pyruvate, ATP, and NADHc) CO2 onlyd) O2 onlye) pyruvate and ATP onlyf) NADH onlyg) ATP and NADH only

What are the six diet-planning principles for developing a healthy eating pattern?

three different ways that amphibians may absorb oxygen.

Consider two habitats with a flowering plant of which bumblebees are a main pollinator. In Habitat A, the bumblebee robs nectar without pollinating 50% of the time it visits a flower.

True or false? a woman's behavior can often determine both whether or not she gets a chronic disease, as well as the chronic disease's course of infection.

What role do insulator sequences play in the regulation of eukaryotic transcription?

A tube worm is a creature that lives within the dark, hot, and mineral-rich conditions of a hydrothermal vent. Deep-sea bacteria use chemosynthesis to convert energy into a chemical form.

What type of mutation always creates a stop codon?

Describe what is happening to the chromosomes during each sub-phase of Meiosis I and Meiosis II.