Biological scientists use a variety of methods to gather evidence, or data. if a biologist gathers different species of snakes from a tropical region, what type of investigation did the biologist perform?
a laboratory experiment
b observational field study
c model-building
d collection of specimens

Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

Contrast how pollination is different among gymnosperms and angiosperms.

What part of the brain is highlighted in the diagram below?