A student is looking at a bacterial specimen using the oil immersion lens, but has forgotten to put immersion oil on the slide. The specimen will appear
A) smaller than it would if immersion oil was used.
B) larger than it would if immersion oil was used.
C) somewhat fuzzy and have poor resolution.
D) the same as it would if the immersion oil was used.
E) to have no color.
C
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If ionizing radiation affects a germ cell,
a. no sperm or eggs will be made. b. more eggs and sperm than normal will be produced. c. sperm and eggs will contain the diploid number of chromosomes. d. damage to the DNA will be inherited by an infant causing genetic defects. e. no problems will arise.
The carboxyl group can exist in an ionized form and also in a nonionized form
__________________ Indicate whether the statement is true or false.
Recent evidence suggests that hydrogenosomes and mitochondria evolved from different endosymbiotically derived organelles.
Answer the following statement true (T) or false (F)
Cells pass through regulatory checkpoints as they prepare to divide. If mutations are detected in the cell, normally __________ will initiate cell death.
a. tumor suppressor genes b. oncogenes c. proto-oncogenes d. metastatic cells