Plants need to minimize water loss while maximizing carbon dioxide intake. With respect to plant leaf structure, how are these conflicting needs met?
What will be an ideal response?
The cuticle acts as a waterproof barrier at the leaf surface: guard cells and stomata regulate the intake of carbon dioxide as well as the loss of water vapor, and leaf shape can act to reduce water loss if the surface area is reduced.
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Which of the following statements is consistent with the principle of competitive exclusion?
A) Bird species generally do not compete for nesting sites. B) The random distribution of one competing species will have a positive impact on the population growth of the other competing species. C) Two species with the same fundamental niche will exclude other competing species. D) Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species. E) Natural selection tends to increase competition between related species.
In situ mRNA techniques are powerful and can be run at almost any time, in any condition because bacterial mRNAs are so stable.
Answer the following statement true (T) or false (F)
How does smoking put people at greater risks of colds and infections?
What will be an ideal response?
The phenomenon in which one crossover decreases the likelihood of crossovers in nearby regions is called ________
A) mitotic recombination B) negative interference C) positive interference D) reciprocal genetic exchange E) chiasma