Solutions Manual
This cleavage pattern in which the future of each cell is decided later after the 4 cell
stage and cells "stack up" as they divide is called _______________ cleavage. -
ANSWER: indeterminate & radial
This cleavage pattern in which the future of each cell is decided very early and cells
twist as they divide during embryonic development is called _________ cleavage. -
ANSWER: determinate & spiral
The pattern above (determinate & spiral) is seen in _________ embryos. - ANSWER:
protostomes
This hollow ball of cells produced when a zygote divides rapidly is called a _________
- ANSWER: blastula
The indented place shown in the hollow balls of cells is called the __________ -
ANSWER: blastopore
Which body system will the blastopore become a part of? - ANSWER: digestive
In all protostome embryos, the blastopore will become the _______________. -
ANSWER: mouth
In all deuterostome embryos, the blastopore will become the ________________. -
ANSWER: anus
Which of the following is/are functions of a coelom? - ANSWER: provides space for
body organs to develop
provides place for nutrients and gases to circulate if there are no blood vessels
fluid in coelom can support animal if there is no skeleton (hydrostatic skeleton)
Echinoderms, like starfish, are the only group that shows both of the following
characteristics. - ANSWER: invertebrates & deuterostomes
T or F: Humans show indirect development. - ANSWER: False: direct
T or F: Removing cells from any early protostome embryo will cause them to die. -
ANSWER: True
T or F: All vertebrates are protostomes and all invertebrates are deuterostomes
except Echinoderms. - ANSWER: False: deuterostomes & protostomes
T or F: All animals have TWO opening digestive system. - ANSWER: False: 0, 1, 2
, List the 7 characteristics shares by all animals. - ANSWER: move, multicellular,
heterotrophic, specialization, eukaryotes, DNA, reproduce
Made by body cells when proteins are broken down. - ANSWER: nitrogen waste
Includes urea, uric acid, and ammonia - ANSWER: nitrogen waste
Handled by the digestive system - ANSWER: digestive waste
Remains after nutrients are absorbed from broken down food - ANSWER: digestive
waste
Handled by the excretory system - ANSWER: nitrogen waste
Also called feces - ANSWER: digestive waste
Most toxic and requires the most water to dilute - ANSWER: ammonia
Least toxic and requires the least water to dilute - ANSWER: uric acid
Made from ammonia by the liver and excreted by the kidneys in humans - ANSWER:
urea
Most often excreted by organisms that live in water - ANSWER: ammonia
Excreted by reptiles, birds, and many insects - ANSWER: uric acid
Excreted by mammals, amphibians, and some fish - ANSWER: urea
Name the three germ layers found in most animal embryos. - ANSWER: endoderm,
mesoderm, ectoderm
Has a body cavity with mesoderm lining the body wall but not around the gut -
ANSWER: pseudocoelom
Has endoderm, mesoderm, and ectoderm, but no body cavity. - ANSWER: acoelom
Has a body cavity lined on both sides with mesoderm - ANSWER: eucoelom
Type of coelom found in flatworms - ANSWER: acoelom
Type of coelom found in round worms - ANSWER: pseudocoelom
Type of coelom found in segmented worms - ANSWER: eucoelom
Type of coelom found in all animals higher than worms on the phylogenetic tree -
ANSWER: eucoelom