The core theme of biology, which explains both the unity and diversity of life, is
A) genetics.
B) ecology.
C) evolution.
D) metabolism.
Answer: C
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Pinocytosis and phagocytosis are accomplished in the cell by the ____
a. nucleus b. lysosome c. endoplasmic reticulum d. plasma membrane e. mitochondria
The reduction of the microbial population to levels that are considered safe by public health standards is called ________.
A. disinfection B. antisepsis C. sterilization D. sanitization
Echinoderms are unusual invertebrates as they have all of the following except:a
an endoskeleton. b. pentaradial symmetry. c. a water vascular system. d. pedicellariae present in some classes. e. small disc-shaped flat bodies.
Abnormal chromosomes are frequently found in malignant tumors. Errors such as translocations may place a gene in close proximity to different control regions. Which of the following might then occur to make the cancer worse?
A) an increase in nondisjunction B) expression of inappropriate gene products C) a decrease in mitotic frequency D) failure of the cancer cells to multiply