A bacterium closely associated with humans is known to be responsible for gastric ulcers and

stomach cancers. The genus of this bacterium is:

A. Heliothrix

B. Helicobacter

C. Herpetosiphon

D. Histophilus

E. Herbaspirillum

Which of the following is the best example of a way human lifestyles affect environmental systems? Burning fossil fuels increases the amount of greenhouse gases in the atmosphere.

Put the four stages of growth in order. First: Second: Third: Fourth: a. Germination b. Death c. Maturation d. Growth

Which statement describes the function of nucleic acids during the synthesis of proteins? A) Complementary bases on tRNA and on rRNA bind together. B) Complementary codons on mRNA and anticodons on tRNA bind together.

Which type of species distribution pattern might require collaboration between different countries for effective preservation? local endemic sparse distribution migratory equal distribution global endemic NextReset

Who named the cell and how did he come up with that name?

What is the compire between phylum and xyleom?

Similar genera are grouped into a (n) A. phylum. B. class. C. family. D. order.

If a given population of diploid organisms contains only three alleles of a particular gene (say, W1, W2, and W3), how many different diploid genotypes are possible in the population?

How does a multicellular organism grow? A. by cell division B. by cell addition C. by cell subtraction D. by cell multiplication

What process makes nitrogen useful to crops? A) nitrogen compounding B) nitrogen conversion C) nitrogen fixation D) nitrogen reaction