USC- Bisc 120 Exam 3 questions with
correct answers
Animals have: - CORRECT ANSWERS ✔✔specialized muscle and
nerve cells that enable them to detect, capture and eat other
organisms
Efficient digestive system - CORRECT ANSWERS ✔✔has mouth
on one end and an anus at the other, animals
Animals are: - CORRECT ANSWERS ✔✔multicellular,
heterotrophic eukaryotes with tissues that develop from embryonic
layers
Animal abilities - CORRECT ANSWERS ✔✔effective eating
machines
Animal cells - CORRECT ANSWERS ✔✔lack cell walls
Collagen - CORRECT ANSWERS ✔✔structural proteins that hold
,animals bodies together
Tissues unique to animals - CORRECT ANSWERS ✔✔Nervous
tissue and muscle tissue
Tissues - CORRECT ANSWERS ✔✔groups of similar cells that act
as a functional unit
Diploid stage - CORRECT ANSWERS ✔✔stage that dominates
animal life cycle
Cleavage - CORRECT ANSWERS ✔✔rapid cell division (zygote
undergoes this after fertilization, forms blastula)
Blastula - CORRECT ANSWERS ✔✔multicellular and hollow
animal embryo at early stage of development (cleavage leads to its
formation)
Flagellated haploid sperm function - CORRECT ANSWERS
✔✔fertilize a larger, haploid, non-motile, polarized egg
,Gastrulation - CORRECT ANSWERS ✔✔produces gastrula,
endoderm, and ectoderm (blastula undergoes this)
Larva - CORRECT ANSWERS ✔✔sexually immature &
morphologically and ecologically different from adult
Metamorphosis - CORRECT ANSWERS ✔✔larvas transformation
into an adult
Homeotic or Hox genes - CORRECT ANSWERS ✔✔regulate the
development of the body form, may arisen in the eukaryotic lineage
that gave rise to animals
Edward B. Lewis, Christiane Nüsslein-Volhard and Eric Wieschaus
- CORRECT ANSWERS ✔✔discovered "the genetic control of early
embryonic development", Hox genes discovered by genetic analysis
of mutant fruit flies
Temporal collinearity - CORRECT ANSWERS ✔✔anterior genes
expressed first during development and posterior later (Hox genes)
, 1.3 million - CORRECT ANSWERS ✔✔number of animal species
that have been named to date; more estimated to exist
Common ancestor of all living animals (timeline) - CORRECT
ANSWERS ✔✔lived between 700 and 770 million years ago (long
period for things to have evolved)
Choanoflagellates - CORRECT ANSWERS ✔✔closest living
relatives of animals; tiny stalked filter feeders
3 types of evidence that choanoflagellates are the closest living
relatives of animals: - CORRECT ANSWERS ✔✔1. Morphology
(sponges collar cells have same morphology as choanoflagellates) 2.
Molecular data (choanoflagellates and animals are sister groups,
share genes for signaling/adhesion proteins )3. Similarity of cells
(identified in other animals but not in non-choanoflagellate
protists)
The origin of multicellularity requires - CORRECT ANSWERS
✔✔the evolution of new ways for cells to adhere (attach) and signal
(communicate) to each other
correct answers
Animals have: - CORRECT ANSWERS ✔✔specialized muscle and
nerve cells that enable them to detect, capture and eat other
organisms
Efficient digestive system - CORRECT ANSWERS ✔✔has mouth
on one end and an anus at the other, animals
Animals are: - CORRECT ANSWERS ✔✔multicellular,
heterotrophic eukaryotes with tissues that develop from embryonic
layers
Animal abilities - CORRECT ANSWERS ✔✔effective eating
machines
Animal cells - CORRECT ANSWERS ✔✔lack cell walls
Collagen - CORRECT ANSWERS ✔✔structural proteins that hold
,animals bodies together
Tissues unique to animals - CORRECT ANSWERS ✔✔Nervous
tissue and muscle tissue
Tissues - CORRECT ANSWERS ✔✔groups of similar cells that act
as a functional unit
Diploid stage - CORRECT ANSWERS ✔✔stage that dominates
animal life cycle
Cleavage - CORRECT ANSWERS ✔✔rapid cell division (zygote
undergoes this after fertilization, forms blastula)
Blastula - CORRECT ANSWERS ✔✔multicellular and hollow
animal embryo at early stage of development (cleavage leads to its
formation)
Flagellated haploid sperm function - CORRECT ANSWERS
✔✔fertilize a larger, haploid, non-motile, polarized egg
,Gastrulation - CORRECT ANSWERS ✔✔produces gastrula,
endoderm, and ectoderm (blastula undergoes this)
Larva - CORRECT ANSWERS ✔✔sexually immature &
morphologically and ecologically different from adult
Metamorphosis - CORRECT ANSWERS ✔✔larvas transformation
into an adult
Homeotic or Hox genes - CORRECT ANSWERS ✔✔regulate the
development of the body form, may arisen in the eukaryotic lineage
that gave rise to animals
Edward B. Lewis, Christiane Nüsslein-Volhard and Eric Wieschaus
- CORRECT ANSWERS ✔✔discovered "the genetic control of early
embryonic development", Hox genes discovered by genetic analysis
of mutant fruit flies
Temporal collinearity - CORRECT ANSWERS ✔✔anterior genes
expressed first during development and posterior later (Hox genes)
, 1.3 million - CORRECT ANSWERS ✔✔number of animal species
that have been named to date; more estimated to exist
Common ancestor of all living animals (timeline) - CORRECT
ANSWERS ✔✔lived between 700 and 770 million years ago (long
period for things to have evolved)
Choanoflagellates - CORRECT ANSWERS ✔✔closest living
relatives of animals; tiny stalked filter feeders
3 types of evidence that choanoflagellates are the closest living
relatives of animals: - CORRECT ANSWERS ✔✔1. Morphology
(sponges collar cells have same morphology as choanoflagellates) 2.
Molecular data (choanoflagellates and animals are sister groups,
share genes for signaling/adhesion proteins )3. Similarity of cells
(identified in other animals but not in non-choanoflagellate
protists)
The origin of multicellularity requires - CORRECT ANSWERS
✔✔the evolution of new ways for cells to adhere (attach) and signal
(communicate) to each other
