Calcium has an atomic number of 20; therefore, calcium has 20

protons

protons plus neutrons

shells

What is the cause of PAtau syndrome?

Which valuable mineral is often found in the rock called kimberlite? A. gold B. silver C. diamond D. platinum

Homogenous means of the same kind or species. a. True b. False

Similarities between heterozygous and homozygous genotypes?

Concerning the nature-nurture issue, with which statement would child development specialists most likely agree? A. Characteristics are determined completely by the environment. B.

All fingerprints are invisble to the naked eye

These are organism that come from the same cell and are genetically identical to one another

The atmosphere will likely contain more carbon dioxide and less oxygen in the future A. if all coal burning power plants are replaced by wind turbines. B. if the rate of deforestation continues to increase. C.

8. What aspects of the experiment should Victor have held constant?

A tornado rips through the North Carolina mountains and destroys a huge forest. This decrease in the tree population is the result of a A) type of punctuated equilibrium. B) density dependent limiting factor. C) primary succession limiting factor.