One of the reasons why the model systems of yeast, Arabidopsis, nematode worms, fruit flies, and mice are so often used to study functional analysis of genes is because
A. they all have only a few chromosomes.
B. they are easy to cross with each other and observe polyploidy effects.
C. they have short life cycles.
D. they are easy to observe in the wild.
E. they mutate easily leading to new genomic variations.
C. they have short life cycles.
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How do sensory cells communicate different types of information to the brain—touch versus light for example?
A. by firing action potentials at different frequencies in the same neuron B. by firing action potentials of varying amplitudes in the same neuron C. by using different neurons for different stimuli (e.g., light and touch) D. by using different kinds of electrical signals in the same neuron as the information is conveyed to the brain E. by using different kinds of receptor potentials in the same neuron
A time lag in the response of survivorship and fecundity to a population's density can occur because ____ is usually
determined by the availability of resources at some time in the past.
a. death b. immigration c. fecundity d. competition e. population growth
To demonstrate the response of several Daphnia genotypes across a wide range of environments, Luc De Meester (1996 ) measured the change in phototactic behavior of Daphnia sampled from lakes that contained different numbers of predatory fish
The lines drawn between control and fish-induced water are termed ________. [two words] Fill in the blank(s) with correct word
_______ is a phenomenon in which one gene produces multiple phenotypic effects.
Fill in the blank(s) with the appropriate word(s).