What type of population growth effect is a flood that washes away many rabbits of population?
a. a density-dependent factor
b. a limiting factor dependent on the individuals
c. a consequence of exponential growth
d. a density-independent factor
e. an initial carrying capacity
d
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The laboratory receives a blood soaked gauze pad with some tissue wrapped in it for culture in a sterile container. The proper disposal of the material will include:
a. placement in the appropriate biohazard container. b. placement in the garbage as long as it is enclosed in the sterile container. c. treatment with a disinfectant prior to dis-posal in the biohazard container. d. placement in the appropriate biohazard container and sterilization for contamina-tion with organic material.
The observation of a range of phenotypes in a genetic trait is ____
a. pleiotropy b. genomic imprinting c. codominance d. penetrance e. continuous variation
Soon after amniotic vertebrates appeared, two different evolutionary lineages began to diverge. They are:
a. the mammals and the reptiles. b. the mammals and the birds. c. the reptiles and the birds. d. the amphibians and the reptiles. e. the crocodiles and the birds.
One of the two main functions of the nuclear envelope is to ____.
A. provide residence for ribosomes B. allow separation of DNA from cytoplasm machinery C. provide total isolation of nuclear components D. enable faster cell division E. enable larger cell size