Fossils from Ethiopia indicate that modern humans had evolved by ________ years ago

a. 15,000
b. 85,000
c. 195,000
d. 950,000
e. 1.2 million


c

Biology & Microbiology

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In a food web, which of the following organisms would be considered heterotrophs? Select all that apply

A. decomposers B. consumers C. primary producers D. secondary consumers

Biology & Microbiology

Which of the following is involved in DNA replication?

a. RNA polymerase b. ligase c. promoter d. terminator

Biology & Microbiology

Neurospora is an ideal organism to study the effects of genetic mutations because of several reasons. What is one of

these? a. Neurospora is a small mammal. b. Neurospora grows as a diploid organism. c. Neurospora requires a medium supplemented with only a few nutrients that it cannot manufacture on its own. d. Neurospora mutant strains that cannot make a particular amino acid can still grow if that amino acid is added to the growth medium. e. Neurospora contains homologous chromosomes that are easily viewed with a light microscope

Biology & Microbiology

Which is incorrect about viral diseases?

A. Most DNA viruses multiply in and are released from the cytoplasm. B. Viral diseases can be zoonoses. C. Diagnosis of some diseases involves antigen detection with monoclonal antibodies. D. Some viruses are teratogenic. E. Some DNA viruses can become permanent residents of host cells.

Biology & Microbiology