These examine patterns within populations to find a correlation between a variable and its suspected effects

Which of the following statements about lichens is incorrect?

A. Lichens are symbiotic relationships between fungi and plants. B. The partnership in a lichen is not species specific. C. Lichens can reproduce sexually and asexually. D. Lichens can extract nutrients from rocks or rainfall. E. Lichens are very sensitive to air pollution.

Identical twins can result from ____

a. the fusion of two sets of identical gametes b. a division of a zygote into two separate cells that develop into two separate embryos c. the fusion of two paternal gametes with a single maternal gamete that then divides d. a lack of chromosomal separation during meiosis resulting in gametes that are diploid e. a mechanism that is not understood

Three very popular strawberry cultivars grown by farmers in the United States are Earliglow, Ozark Beauty, and Tristar

Earliglow produces all of its fruit in the early summer (June-bearing). Ozark Beauty produces fruit from mid to late summer (everbearing). Tristar produces fruit all summer long, starting when conditions become favorable for flowering and fruit production. What is the best classification for these three strawberry cultivars? A) Earliglow: long night; Ozark Beauty: short night; Tristar: night neutral B) Earliglow: short night; Ozark Beauty: short night; Tristar: night neutral C) Earliglow: night neutral; Ozark Beauty: short night; Tristar: long night D) Earliglow: short night; Ozark Beauty: long night; Tristar: long neutral

Streptococcal species are classified using protein antigens found on the cell surface of many species.

A) True B) False