Which of the following is an extrusive igneous rock that contains so many air pockets that it often floats in water

a.) obsidian

b.) granite

c.) gabbro

d.) pumice

What do you know about dna?

MRSA is the acronym for methicillin-resistant Staphylococcus aureus. Many of the strains of the common bacterium are also resistant to other antibiotics in use today.

Which statement about haploid organisms is true? A) They must be heterozygous for all genes. B) They must be homozygous for all genes. C) They have excess alleles for certain genes. D) They are missing a certain number of genes.

In the human abo blood grouping, there are four basic blood types, type a, type b, type ab, and type o. the blood proteins a and b are:

When 2 atoms combine by sharing electrons, it is a (n) __ bond. A) ionic B) covalent

Which Scientists Gave Cells their name while observing cork under a microscope

What. System rid the body of carbon dioxide?

What is the process of mountain building called

Sexual reproduction is the reproductive process that 1) keeps species from changing. 2) produces identical offspring. 3) causes mutations. 4) creates genetic variety.

About half of the forests that covered the earth in the early 1900s have been cut down. Discuss the impact this has on carbon dioxide levels in the atmosphere. Support your answer.