What is responsible for the rapidly melting ice in Antarctica?

a. human settlement

c. air pollution

b. climate change

d. acid rain

What is devastating orange crops in the US

Which part of the neuron acts as a receiver for nerve impulses? A. Axon B. Nucleus C. Dendrites

Which animal contains one body opening that serves as both mouth and anus?

Linnaean classification involves a. only large, general categories of organisms. b. only small, specific categories of organisms. c. both large and small categories of organisms. d. no categories of organisms.

What factor maintains the same distance between strands in a dna molecule?

Which route represents the path taken by the European explorer Christopher Columbus? A) 1 B) 2 C) 3 D) 4

Which gas is the most abundant of the trace gases? A. nitrogen B. oxygen C. argon D. carbon dioxide

Describe the central dogma of molecular biology, briefly describe the processes of transcription and translation.

magine that the animal body produced sperm and eggs with mitosis instead of meiosis. What chromosome number would the autosomes of the third generation have if the first generation had four chromosomes

A well supported testable explanation of phenomena that have occurred in the natural world is called