Which of the following flower parts does not produce female structures?

1.carpel
2.stamen
3.stigma
4.style


2

Biology & Microbiology

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Which statement is true for scyphozoan medusae?

(a) They are the dominant body form. (b) They are generally smaller than hydrozoan medusae. (c) Most live in freshwater. (d) They are scavengers.

Biology & Microbiology

When grouping organisms, which classification is most general for a particular type of organism?

A. Order B. Kingdom C. Family D. Phylum E. Species

Biology & Microbiology

________ enzymes catalyze the hydrolysis of beta (1-4) linkages between successive D-glucose residues of cellulose.

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

Biology & Microbiology

The human b-globin gene has two alleles, HS and HA, individuals that are homozygous for HS have sickle-cell anemia and a lower fitness. Individuals that are heterozygotes (HSHA) do not show sickle-cell symptoms and have a resistance to malaria. Individuals that are homozygous for HA have the highest fitness but are susceptible to malaria. In areas where malaria is prevalent the HS allele is maintained in the population. Which type of selection is occurring with the b-globin gene?

A. stabilizing B. directional C. disruptive D. balanced E. negative frequency dependent

Biology & Microbiology