Sponges belong to the phylum

A. Echinodermata.
B. Platyhelminthes.
C. Porifera.
D. Chordata.
E. Cnidaria.



C. Porifera.

Biology & Microbiology

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Alcohol is a waste product produced by yeast in the presence of sugar and the absence of ________.

A. ATP B. H2O C. CO2 D. O2

Biology & Microbiology

Compare mitosis and meiosis. Which statement is accurate?

a. Meiosis I is more like mitosis than is meiosis II. b. Both processes result in four cells. c. Synapsis (pairing of chromosomes) occurs in both. d. Chromatids are present only in mitosis. e. Meiosis II resembles mitosis.

Biology & Microbiology

Which of these is an incorrect comparison between flagella and cilia?

A. Flagella are longer structures than cilia. B. Flagella have essentially the same internal structure of cytoskeleton proteins as cilia. C. Flagella are used for propulsion, while cilia are used to attach cells to other cells or surfaces. D. Flagella and cilia are both used for types of cellular movement. E. Flagella are found in all three domains of organisms, while cilia are found only in Eukarya.

Biology & Microbiology

An allele whose expression is completely masked by the expression or effect of its allelic partner is

a. homologous. b. homozygous. c. dominant. d. recessive.

Biology & Microbiology