The molecular clock has been useful to determine the phylogenetic relationships of species based on the assumption that DNA is preserved unchanged over long periods of time. True False

Redwoods are associated with which of the following? taiga boreal forest temperate rain forests tropical rain forest temperate deciduous forest

Large grazing animals such as wildebeests and gazelles are best associated with which biome? savanna temperate grassland temperate deciduous forest tropical desert tundra

Colony collapse disorder is __ limited to Europe D limited to the United States when honey bees leave in winter and don't return to their hives in spring the disintegration of bee hives experienced by members of the bee colony after the queen's death

Choose the substances that can pass through the blood-brain barrier. Nicotine All metabolic waste Some anesthetics All hormones Alcohol

The area of the thalamus that processes auditory information is the __ geniculate nucleus of the thalamus. dorsomedial dorsolateral lateral medial dorsal

Which of the following is an abiotic component of an ecosystem? nutrients microbes autotrophs heterotrophs tertiary consumers

In plants, chloroplasts function as the site of cellular respiration. A True B False

Water molecules move through plants into the atmosphere through: precipitation condensation percolation transpiration

This type of bone is also called cancellous bone epiphyseal line endochondral ossification sesamoid bone long bone compact bone spongy bone epiphyseal plate appositional growth secondary bone primary bone longitudinal growth

TF A neutral stimulus becomes a CS by being paired with a US. a. True b. false