In a rainforest food chain, caterpillars and butterflies eat orchid plants. Toucans eat the caterpillars and butterflies. Leopards eat the toucans. Which statement describes the energy in this food chain?

The leopards gain energy directly from the butterflies.
The orchids have the least amount of available energy.
The caterpillars gain energy directly from the orchids.
The toucans have more available energy than the butterflies

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

The function of the excretory system is to control homeostasis and