ANSWERS VERIFIED 100% CORRECT|GRADED A+
The time between 542-488 million years ago marks which period? -
ANSWER-- Cambrian period
During embryonic development, unique cell layers develop and
distinguish during a stage called ________. -ANSWER-- the germ layer
stage
Which of the following periods is the earliest during which animals may
have appeared? -ANSWER-- Ediacaran period
Which of the following statements is false?
a)Acoela and Cnidaria both possess radial symmetry.
b)Arthropods are more closely related to nematodes than they are to
annelids.
c)Eumetazoans have specialized tissues and parazoans don't.
d) Lophotrochozoa and Ecdysozoa are both Bilataria. -ANSWER--
Acoela and Cnidaria both possess radial symmetry.
Which group of invertebrates is most closely related to vertebrates? -
ANSWER-- cephalochordates
Which of the following is not contained in phylum Chordata?
a)Urochordata
b)Echinodermata
c)Cephalochordata
d)Vertebrata -ANSWER-- Echinodermata
Which of the following statements about the parts of an egg are false?
,a)The chorion facilitates gas exchange.
b)The amniotic cavity is filled with albumen.
c)The allantois stores nitrogenous waste and facilitates respiration.
d)The yolk provides food for the growing embryo. -CORRECT
ANSWER-- The amniotic cavity is filled with albumen.
Flies are_______ -ANSWER-- hexapods
Which of the following statements about the anatomy of a mollusk is
false?
a)The tissue beneath the shell is called the mantle.
b)A digestive gland is connected to the stomach.
c)Mollusks have a radula for grinding food.
d)The digestive system includes a gizzard, a stomach, a digestive gland,
and the intestine. -ANSWER-- The digestive system includes a gizzard,
a stomach, a digestive gland, and the intestine.
What type of data is primarily used to determine the existence and
appearance of early animal species? -ANSWER-- fossil data
The nematode cuticle contains _____. -ANSWER-- chitin
Which of the following is not a feature common to most animals? -
ANSWER-- asexual reproduction
Which of the following is not an anthropoid?
a)apes
b)humans
c)lemurs
d)monkeys -ANSWER-- lemurs
Monotremes include: -ANSWER-- platypuses
, A mantle and mantle cavity are present in: -ANSWER--
phylum Mollusca
Crustaceans are _____. -ANSWER-- Ecdysozoans
Members of Chondrichthyes are thought to be descended from fishes
that had ________. -ANSWER-- a bony skeleton
Which of the following organism is most likely to be a diploblast?
a)sea star
b)shrimp
c)insect
d)jellyfish -ANSWER-- jellyfish
Which of the following statements about diploblasts and triploblasts is
false?
a)Animals that display radial symmetry are diploblasts.
b)The mesoderm gives rise to the central nervous system.
c)The endoderm gives rise to the lining of the digestive tract and the
respiratory tract.
d)Animals that display bilateral symmetry are triploblasts. -ANSWER--
The mesoderm gives rise to the central nervous system.
Which of the following is thought to be the most closely related to the
common animal ancestor?
a)fungal cells
b)bacterial cells
c)protist cells
d)plant cells -ANSWER-- protist cells
Eccrine glands produce ________. -ANSWER-- sweat