Most drugs that inhibit the synthesis of the cell wall act by
a. preventing the cross-linkage of nam subunits
b. blocking the secretion of cell wall molecules from the cytoplasm
c. preventing the formatioon of lactamases
d. preventing the formation of alanine-alanine bridges
e. disrupting the formation of the mycolic acid layer of the cell wall

Where do homologous chromosomes exchange genetic material through crossing over?               a.  chlorophyll    b.  centrosomes    c.  centromeres    d.  chiasma

List two new traits (structural or behavioral) that each new species of rat might demonstrate as it adapts to the conditions on two of the four islands. choose only two islands that are described in the lesson. record the island latter and the major habitat feature of the island. then list two new traits each rat subspecies might demonstrate in order to survive the habitat on that island. note: new traits should be unique to that island and be in response to that island’s habitat feature. i cannot remember islands that were names in the lesson so only answer if you have done the lesson (5.13 life science 7b) choose 2 of the islands and describe a structural and a behavioral trait for a rat on each island so 4 total answers, 2 different structurals and 2 different behaviorals, one for each rat for each island

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%