During meiosis I in humans, one of the daughter cells receives
a. only maternal chromosomes.
b. a mixture of maternal and paternal chromosomes.
c. the same number of chromosomes as that of a diploid cell.
d. a sister chromatid from each chromosome.
e. one-fourth the amount of DNA in the parent nucleus.
Answer: b. a mixture of maternal and paternal chromosomes.
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Protein digestion begins in the
a. mouth. b. stomach. c. small intestine. d. large intestine. e. esophagus
Which of the following organelles oxidizes toxic substances such as alcohol, and breaks down other potentially harmful by-products of metabolism?
a) lysosomes b) peroxisomes c) mitochondria d) proteasomes e) ribosomes
These are the simplest animals and are diploblastic, which means that they only have two layers of cells, an outer layer and an inner hollow layer that is involved in gathering food.
A. Mollusca B. Annelida C. Jellyfish D. Arthropoda
When lactose becomes available the genes encoding b-galactosidase and lactose permease are upregulated in E. coli.
Answer the following statement true (T) or false (F)