Describe the four premises of Darwin's theory of evolution by natural selection
What will be an ideal response?
All organisms produce or have the potential of producing more offspring than can survive to reproduce. This is because resources are limited in the environment, which means that offspring will compete with one another for these limited resources. Since individuals in a population are varied with respect to their traits, the outcome of the competition is dependent on the possession of certain traits that give an individual an edge over other competing individuals. If these traits are heritable, then the successful competitors will pass on these traits to their offspring with the result that more offspring will have the traits of the successful individual over the traits of the unsuccessful individuals.
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Laboratory animals must be used to determine lethal and infectious doses of viruses.
Answer the following statement true (T) or false (F)
Stomata open when K+ concentration in guard cells ____, followed by water ____ the guard cells by osmosis
a. increases; entering b. decreases; entering c. decreases; leaving d. increases; leaving e. increases H+; leaving
Which of the following best describes the phylogenetic relationship between protists, fungi, plants, and
animals?
a. Fungi and animals share a common protist lineage, while plants arose from a different protist ancestor. b. Fungi and plants share a common protist lineage, while animals arose from a different protist ancestor. c. Animals and plants share a common protist lineage, while fungi arose from a different protist ancestor. d. Plants, animals, and fungi each arose from a different protist lineage. e. Plants, animals, fungi, and protists each arose from the same prokaryotic ancestor.
Digested white sugar is broken into ——and ——.
a. glucose, lactose b. glucose, fructose c. sucrose, maltose d. fructose, sucrose