Biology sem1
2.1.4 quiz: chemical reactions and bonding
question 2 of 10
2 points
what causes an ionic bond?
a. a positive ion is attracted to a positive ion.
b. two atoms share electrons.
c. a positive ion is attracted to a negative ion.
d. two ions share electrons.

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

When mendel crossed a true-breeding short plant with a true-breeding tall plant all the offspring were tall. which term describes the gene for tallnes?

Number and variety of living organisms includes genetic, species, and ecological types