The two-point threshold is smaller for the: a. fingertips and lips than for the belly. b. forearm than for the nose. c. back and thighs than for the palm. d. upper arm than for the big toe.

The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. the major factors that affect the health and function of the great barrier reef are climate change and pollution. which question investigates the effects of a biotic factor on the reef ecosystem?

Which image shows labeled organelles that are present only in plant cells?

Select the correct answer. what does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms