Why do many animals do most of their calling at dawn and dusk?
A. Imprinting behaviors are better received at those time.
B. Animals preferentially mate at night.
C. Air is less turbulent and carries sound better.
D. Most predators are not active at those time.
E. Pheromones are released at dawn and dusk.
Answer: C
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A. sunlight. B. metabolizing chemical compounds. C. little tiny AAAAAAAAA batteries. D. temperature gradients. E. sunlight AND metabolizing chemical compounds.
When a ________ enters a host cell, it loses the outermost protein layer and is then referred to by virologists as a double-layered particle (DLP).
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1. In red-winged blackbirds, females tend to choose males with the most desirable territories and males compete with each other for territories. Redwing blackbirds demonstrate both intersexual selection and intrasexual selection. 2. Cryptic female choice is a type of intrasexual selection. 3. A population undergoing microevolution would show Hardy-Weinberg disequilibrium. 4. The Mexican axolotl (Ambystoma mexicanum) is an amphibian that has a derived mode of development characterized by metamorphic failure. This mode of development results in an entirely aquatic life cycle and is an example of paedomorphosis.
Proper handwashing and aseptic techniques greatly reduce the likelihood of medical professionals serving as ______ carriers
Fill in the blank(s) with the appropriate word(s).