Which of the following will increase plant growth?

A. carbon dioxide levels above normal

B. below normal water levels

C. depleted soil nutrients

D. decreased light intensity

Consider this claim: Changes in environmental conditions always result in new ecosystems and loss of biodiversity characterized by an increase in the number of some species, the evolution of new species, and the extinction of some species.

What is the benefit of using a shortcut in a reaction between two chemicals?

What is the hormone released by the posterior pituitary that causes your kidneys to reabsorb and conserve water?

Specialized noncontractile muscle cells of the conducting system are necessary to:

You cross a pure-breeding plant with red flowers and a pure-breeding plant with white flowers. All the offspring have red and white speckled flowers. What type of allele relationship does this show? A. pleiotropy B. codominance C. simple dominance D.

1. An ecosystem consists of one oak tree on which 10,000 herbivores are feeding. These herbivores are prey to 500 spiders and carnivorous insects. There birds of the same species are eating these spiders and carnivorous insects.

With which of the following statements would a biologist be most inclined to agree? A) Humans and other apes represent divergent lines of evolution from a common ancestor.

The best model of organisms' complex feeding relationship is a (n) A. Food web B. Food chain C. Energy link D. Energy pyramid

Which element of the scientific process cannot be changed? A. A theory B. A data record C. A hypothesis D. An experimental procedure

Which groups of animals was The first land dweller