Approximately how much energy is transferred from one step in a food chain to the next? 90% 1%.1% 10%

Which are two ways a population can decrease in size a) immigration and emigration b) increase death rate and immigration c) decrease birthrate ans emigration d) emigration and increase birthrate

Excessive amounts of human-produced carbon dioxide can affect earth by?

What are gametes??

What happens to the warm, less dense material inside Earth? Moves sideways Remains stationary Rises towards the crust Sinks towards the outer core

Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings, illustrating A) the bottleneck effect. B) stabilizing selection. C) frequency-dependent selection. D) neutral variation. E) disruptive selection.

How do pallettes aid in the healing of cuts A. Platelets become whole red blood cells to prevent further loss of blood B. platelets make blood thicker to prevent further loss of blood C.

Which list describes the path carbon dioxide takes to the nose?

What is being divided and equally distributed

Which of these groups of mammals is defined by having multicusped lower molars and a narrow pelvis? a. allotheria b. prototheria c. theria d. metatheria e. eutheria

Advantages and disadvantages of amniocentesis