What is required for the separation of homologous chromosomes at anaphase I?
a) the separation of sister centromeres
b) the dissolution of the chiasmata
c) the separation of the nucleosomes
d) the dissolution of the centromeres
e) the dissolution of the centrosomes
Ans: b) the dissolution of the chiasmata
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A. unsaturated B. aromatic C. sterol D. saturated
Which one of the following types of junctions in an epithelium allows the tissue to stretch and bend, as in the epithelium of the skin?
A) tight junction B) adhesion junction C) glandular junction D) stratified junction E) gap junction
During which time period did shallow seas cover much of the land and another burst of evolutionary diversification
occur? a. Silurian period b. Permian period c. Devonian period d. Ordovician period e. Carboniferous period
Glucose that circulates in your blood has one of three fates: it is used to fuel cellular activities, it can be converted into fat, or it can _______.
a. be converted into starch b. be stored temporarily as glycogen c. be converted into fructose and linked together d. serve as a buffer e. be broken down into simple sugars