Answer the following questions true (T) or false (F)
1. Nearly half the antibiotics used in the United States go into animal feed as growth stimulants.
2. Malaria is caused by a bacterium.
3. Most protists are unicellular.
1. TRUE
2. FALSE
3. TRUE
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Two eukaryotic organelles that are hypothesized to be the result of endosymbiosis are the ________ and the ________
A) nucleus / Golgi body B) mitochondrion / chloroplast C) endoplasmic reticulum / Golgi body D) hydrogenosome / chloroplast
Organs strung together functionally and usually structurally form
(a) organs. (b) systems. (c) tissues. (d) organelles.
Type O blood is missing both anti-A and anti-B antibodies
Indicate whether this statement is true or false.
Gametes may carry different combinations of alleles because of
A. crossing-over and random alignment of chromosomes. B. random alignment of chromosomes. C. random fertilization and crossing-over. D. random fertilization and alignment of chromosomes. E. random fertilization.