If the phloem in a tree trunk were to become blocked, how would this affect the plant?
A) The leaves would dry out.
B) Sugars could not be made.
C) Sugars could not be transported from leaves to roots.
D) Water could not be sent to the roots.
C
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The ___ Echinoderm lineage is made up of brittle and basket stars, each with elongated, slender, somewhat snakelike
arms surrounding a well-defined central disk.
a. Echinoidea b. Ophiuroidea c. Crinoidea d. Holothuroidea e. Asteroidea
Reversible reactions in a cell rarely reach equilibrium because
a. the products are generally reactants in other reactions and are thus immediately used. b. a cell at equilibrium is dead. c. most reactions in a cell are not reversible, allowing the cell to devote additional resources to regulating the few reversible reactions that do occur. d. cells have no way of measuring the relative ratios of reactants and products. e. conditions in the cell change too rapidly for any reaction to ever reach equilibrium.
Thyroid hormone ____
a. increases the resting metabolic rate of cells throughout the body b. slows the heart rate and increases lipid metabolism c. inhibits protein synthesis d. increases glycolysis while decreasing oxidative phosphorylation e. stimulates the release of ADH from the hypothalamus
Some traits are multiple-allele traits, meaning there are more than simply one recessive and one dominant allele possible. Which of the following is not an example of a multiple-allele trait?
A. sickle-cell disease B. cystic fibrosis, which is controlled by more than 300 different alleles C. blood grouping, which is controlled by the interaction of three different alleles D. All of these answer choices are correct.