Sponges have two true tissue layers
____________________ Indicate whether the statement is true or false.
F, no
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Diploid somatic cells of elephants have 56 chromosomes. If nondisjunction of one of an elephant's chromosomes occurs in meiosis I, the resulting sperm are expected to have the chromosome complement:
A. 28, 28, 28, 28 B. 28, 28, 29, 27 C. 29, 29, 27, 27 D. 29, 29, 28, 28 E. 56, 56, 57, 55
In Mendel’s hybridization experiments, the ratio of plants expressing dominant traits in the F2 generation was nearly 3:1, but never exactly the correct ratio. Ignoring any external confounding factors, what effect would you expect a larger sample size to have on the ratio of dominant to recessive traits expressed?
a. Larger sample sizes would have no effect on the ratio. b. The results would drift further from the expected ratio. c. The results would become more precise with more samples. d. Larger sample sizes would increase the risk of cross-contamination.
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
A document that lists all potential negative effects of participation in a study
A) Ecosystem
B) Informed consent agreement
C) Epidemiologic studies
D) Critical thinking
E) Homeostasis
F) Metabolism
G) Placebo
H) Theory
I) Hypothesis
J) Adaptive trait