The membranous compartmentalization of a cell
A) divides the cell into two equal-sized halves.
B) allows different chemical conditions to be maintained in different parts of the cell.
C) requires the presence of a cell wall.
D) is common to both prokaryotes and eukaryotes.
Answer: B
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Which type of skeleton is found in earthworms?
a. Exoskeletons b. Axial skeleton c. Endoskeletons d. Appendicular skeleton e. Hydrostatic skeleton
Secretion of sex steroid hormones in males and females is controlled by ____
a. different receptors in males vs. females b. different hormones depending on sex c. the same hormones but different pathways depending on sex d. different pathways and hormones depending on the sex e. the same pathway and hormones regardless of sex
A nucleosome consists of DNA wrapped around scaffolding proteins
__________________ Indicate whether the statement is true or false.
Which phylum is associated with all of these terms: asymmetry, choanocytes, filter feeding, osculum, and spicules?
a. Porifera b. Nematoda c. Ctenophora d. Nemertea