Birds and Animals
What structure in a bird's stomach grinds food?
a. gizzard
b.cloaca
c. crop
d. bursa of Fabricus
a. gizzard
What is the large, usually spherical body near the center of the cell that serves as the cell's master control center?
Nucleus
Which of the following protozoa moves and engulfs prey using pseudopods?
a. amoeba
b.paramecium
c. euglena
d. plasmodium
a. amoeba
Which of the following groups are NOT mollusks?
a. echinoderms
b. cephalopods
c. bivalves
d. gastropods
a. echinoderms
A cell, such as a gamete, that has half the usual number of chromosomes has a ______ set.
haploid
What twisted cord keeps the yolk of a bird egg properly oriented for the development of the embryo?
a. albumen
b. chalaza
c. germinal spot
d. brood patch
b. chalaza
What is the fluid medium of the cell?
Cytoplasm
An insect that begins life as a wormlike larva that forms a cocoon or chrysalis and emerges as a mature adult undergoes _______ metamorphosis.
complete
What group includes earthworms, sea worms, and leeches?
a. flatworms
b. roundworms
c. segmented worms
d. nemertean worms
c. segmented worms
The process in which DNA bases connect together and only one type of base will fit another is ______.
Base pairing
What organ allows a fish to adjust its buoyancy so that it can remain stationary at a given depth?
a. gill chamber
b. lateral line
c. swim bladder
d. Jacobson's organ
c. swim bladder
Mitochondrion
The process by which DNA is copied is ___________.
Replication
The ___________ are a group of invertebrates characterized by spiny skin, radial symmetry, and a water-vascular.
Echinoderm
The process by which cells in a developing embryo take on specialized forms to become specific types of cells is __________.
Differentiation
What are leaping amphibians that lack tails?
a. caecilians
b. efts
c. axolotls
d. anurans
d. anurans
Pairs of genes that do not obey the law of independent assortment demonstrate ________.
Linkage
The actual combination of genes that a person inherits for a particular trait is his __________.
Genotype.
Which group of reptiles have scales and lack legs and nictitating membranes?
a. snakes
b.lizards
c. crocodilians
d. tuatara
a. snakes
Sequences of noncoding DNA that are interspersed among the protein-coding regions of a gene are ______.
a. exons
b. introns
introns
The process by which living cells produce energy from food without using oxygen is fermentation.
a. True
b. False
true