Jessica wanted to see what kitchen cleaner worked best for cleaning her counters. She used Lysol, Clorox, Pinesol, and just water. For each cleaner, she put 5 milliliters of grape juice on the counter, sprayed the cleaner, and wiped it with one paper towel.

. fibrinogen is soluble in water and is found in high concentrations in the blood, where it waits until needed to form a clot

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.