The vascular cylinder of a root consists of ________
a. endodermis
b. root apical meristem and the root cap
c. cortex and pith
d. primary xylem and phloem
d
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The genome of most prokaryotes consists of ____
a. a single linear DNA molecule b. a single circular DNA molecule c. many linear DNA molecules d. many circular DNA molecules e. a single DNA molecule that may be circular or linear, depending on the species
Answer the following statements true (T) or false (F)
1. Cephalopods have a ring structure in their skin that secretes mucus to bind mating individuals and forms a protective cocoon for their eggs. 2. Echinoderms have centralized nervous control at the center of their bodies. 3. Monotremes are classified as reptiles because they lay leathery eggs. 4. Male monotremes and eutherians possess mammary glands. 5. Mastication is a kind of physical digestion.
The entrance into the cavity formed during gastrulation in sea stars and frogs is called the
a. archenteron. b. blastocoel. c. blastocyst. d. blastopore.
Many species of flowering plants reproduce
asexually by __________. Fill in the blank(s) with the appropriate word(s).