F a scientist is observing biotic and abiotic factors, which of the following level of organism must she be studying? A. A population B. An individual organism C. An ecosystem D. A community

Did dinosaurs live millions of year ago or thousands of years ago?

Which is a homologous chromosomes pair?

In response to a steak dinner, certain secretions are needed to aid digestion. what cells in the pancreas would provide these secretions? view available hint (s) in response to a steak dinner, certain secretions are needed to aid digestion.

Which feature of the eye is analogous to a hole in the center of a donut? a. Cornea b. Iris c. Retina d. Pupil

How is information translated during protein synthesis? A. From proteins to nucleic acids B. From amino acids to nucleic acids C. From proteins to amino acids D. From nucleic acids to amino acids

In which phase of meiosis does the chromosome number change from diploid to haploid? Prophase I Anaphase I Prophase II

Irene occasionally experiences unpredictable episodes of intense dread accompanied by chest pains and a sensation of smothering. Since her symptoms have no apparent cause, they would probably be classified as indicative of:

A scientist has discovered the means to block the chemical that directly provides cells with energy for cellular processes. Which cell substance is most likely to be inhibited by this discovery?

For questions 4 and 5, refer to the passage below. Many cells make and use an enzyme, called catalase, to facilitate the decomposition of hydrogen peroxide (H2O2). The products of the decomposition are hydrogen (H2) and oxygen (O2). 4.

Which scientific area is major force in shaping modern classification methods