Which structures make up the innermost whorl of a flower?

a. the receptacles
b. the carpels
c. the sepals
d. the stamens


Answer: b. the carpels

Biology & Microbiology

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If a positive reaction is last observed at a dilution of 1:256, the titer is

A. 128. B. 1/512. C. 1/256. D. 256.

Biology & Microbiology

Binary fission is:

A. cell division by meiosis B. cell division by mitosis C. cell division by simple splitting D. fluorescent in situ hybridization (FISH) E. exchange of genes between two cells

Biology & Microbiology

The transfer of _____________ from one molecule to another is an oxidation-reduction reaction, or redox reaction.

Fill in the blank(s) with the appropriate word.

Biology & Microbiology

Sputum is obtained by

A.) swabbing the mouth to sample saliva. B.) a clean catch urine sample. C.) the patient coughing up mucus from the lower respiratory system. D.) a spinal tap above the chest. E.) a throat swab.

Biology & Microbiology