How has life been able to exist on Earth but not the other

four terrestrial planets?

Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater? 1. a caliper and 2. a flask 3. a stopwatch and a beaker 4. a balance and a graduated cylinder 5.

You look out the window and see some fish and a frog in a small stream lined by rocks brush some trees and buldings. Are you looking at a population or an ecosystem

Estuaries contain a mixture of what?

What is a common result of the collision of two continental plates? A. very long fault lines B. formation of island chains C. lava flows into valleys D. folded rock layers

Compare Niger's and Italy's net migration rates on the chart above. What do these figures mean for the two countries?

What type of attractions between water molecules occur because of water's dipolar nature?

What type of reaction do cells use to combine smaller monomers into larger functional polymers?

In which biome are the factors of temperature, mineral content, and moisture most constant? A. ocean B. desert C. rain forest D. tundra E. jungle

How is the structure of rna different from dna (2 ways) ? describe the structure of both dna and rna in your answer?

How does the number of chromosomes in an organism's reproductive cells compare to the number of chromosomes in the organism's body cells? A. The reproductive cells have half as many chromosomes as the body cells B.