The biological role played by a species in its environment is called

a. ecosystem

habitat

niche

population

Which occurs during transcription? A. DNA is copied to create a second DNA strand. B. mRNA codons and tRNA anticodons assemble amino acids. C. DNA is unzipped with the aid of DNA polymerase. D. mRNA is synthesized from a strand of DNA.

Which crater provides evidence of an impact great enough to wipe out the dinosaurs (and lots of other life on Earth) ? A. Ida B. Dactyl C. Meteor D. Chicxulub

A mutation is a mistake or change in the

Approximately how far do lithospheric plates move in a year?

How does natural selection lead to evolution? A. Adapted traits cannot be passed to offspring. B. Every generation is a new species. C. An organism always has the same traits as its parent. D. Many small changes can create a whole new species. SUBN

8. In the S-Phase of the cell cycle; DNA is replicated. Why would eukaryotic cells need to replicate DNA before the nucleus divides? A. To trigger genetic transfer of DNA. B. To encourage rapid mutation rates in the organism. C.

The patient has been placed on a nitroprusside drip for the treatment of a hypertensive crisis. which mechanism of action does the nurse know is true for nitroprusside?

How many oxygen molecules (O₂) are required each time a molecule of glucose (C₆H₁₂O₆) is completely oxidized to carbon dioxide and water via aerobic respiration,? A) 1 B) 3 C) 6 D) 12 E) 30

Which of the following sentences are correct? (1) for millions of years dinosaurs ruled the earth; they roamed freely over the land and through the oceans.

2. A flower arranger is growing some flowers in a garden. He has seeds for red, and seeds for pink plants. Both colours are found or the same allele as each other. Red is the dominant colour, while pink is recessive.