ions are necessary to activate the binding sites on the actin filaments.

Why can diamonds form in the mantle?

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i. e.

An area surrounded by tall mountains contains a very large, isolated population of green and white peacocks.

A distinguishable element of the earth's crust such as a continent, mountain, valley, rift, or island is called a (n)

Why are cinder cones short-lived?

You observe 4 cell samples under a microscope. Identify which one belongs to a plant. A. Sample 2 has mitochondria and chloroplasts, a cell wall and a large vacuole. B. Sample 3 has mitochondria and a nucleus but no cell wall. C.

A student uses a balance to determine the mass of a feather. Which is most likely to be correct? A 10grams, B 10meters, C 10liters, D 10milliliters

Why is it that two species cant occupy the same niche for an extended period of time

For each menu item at a fast food restaurant, fat content (in grams) and number of calories were recorded. A scatterplot of these data is given: Reference: Ref 4-3 A plausible value for the correlation between fat content and calories is A. + 0.2. B.

Geologists use radioactive dating for which of the following? (A). Identifying the relative ages of rock layers. (B). Determining the absolute ages of rocks. (C). Telling how radioactive substances is (D). Collecting evidence of fossils.