biodiversity

Question 1

key animal characteristics:
symmetry
number of _____
______原肢类 vs. _______后口动物

Answer 1

key animal characteristics:
symmetry
number of cell layers
protostome vs. deuterostome

Question 2

symmetry:
none
______: If the organism is cut through its center, the resulting parts look the same.
_____:There is an axis; on both sides of the axis the organism looks roughly the same.

Answer 2

symmetry:
none
radial: If the organism is cut through its center, the resulting parts look the same.
bilateral:There is an axis; on both sides of the axis the organism looks roughly the same.

Question 3

number of cell layers:
_____: 32 cells
____
_____

Answer 3

number of cell layers:
morula
blastula
gastrula

Question 4

number of 3 layers:
endoderm-digestive tract
ectoderm-skin
mesoderm-muscles, circulatory system, reproductive system, bones

Answer 4

number of 3 layers:
endoderm-digestive tract
ectoderm-skin
mesoderm-muscles, circulatory system, reproductive system, bones

Question 5

cleavage: zygote-blastula
Cleavage-rapid succession of cell division
first form the morula (32 cells)
blastula(128 cells)-animal pole, vegetal pole
morula-blastula: gastrulation
hollow ball of cells with large cavity

Answer 5

cleavage: zygote-blastula
Cleavage-rapid succession of cell division
first form the morula (32 cells)
blastula(128 cells)-animal pole, vegetal pole
morula-blastula: gastrulation
hollow ball of cells with large cavity

Question 6

Gastrulation原肠胚形成-
Gastrulation - sorts all the cells into distinct cell
layers (ectoderm, endoderm, and mesoderm)
Blastula (hollow ball of cells)
transformed into the Gastrula (three
layered stage)

Answer 6

Gastrulation原肠胚形成-
Gastrulation - sorts all the cells into distinct cell
layers (ectoderm, endoderm, and mesoderm)
Blastula (hollow ball of cells)
transformed into the Gastrula (three
layered stage)

Question 7

animals with 3 cell layers:
____-mouth formed first
______:anus formed first
This mouth first development leads into a head
and brain development
• This leaves little time for advanced development
of cerebral structures

Answer 7

animals with 3 cell layers:
protostome-mouth formed first
deuterostomes:anus formed first
This mouth first development leads into a head
and brain development
• This leaves little time for advanced development
of cerebral structures

Question 8

animal tree kinds:
\_\_\_\_\_\_:单孔目动物
\_\_\_\_鸭嘴兽
echidnas针鼹
\_\_\_\_\_\_:有袋类动物
opossum负鼠
\_\_\_\_\_袋鼠
\_\_\_\_\_\_ mammals:哺乳动物
humans

Answer 8

animal tree kinds:
monotreme:
platypus
echidnas
marsupials:
opossum
eutherian mammals:
humans

Question 9

The development of oxygenic photosynthesis led to the _____ explosion when many _______ diversified. The first vertebrate animals were ___________ and the first land tetrapods were ___________ . ____ acquired adaptations that allowed them to live and reproduce without access to ___________ . The extinction of the dinosaurs was followed by the diversification of birds and ___________ .

Answer 9

The development of oxygenic photosynthesis led to the Cambrian(寒武纪）explosion when many shelled marine invertebrates diversified. The first vertebrate animals were fish and the first land tetrapods were amphibians. Reptiles acquired adaptations that allowed them to live and reproduce without access to water. The extinction of the dinosaurs was followed by the diversification of birds and mammals.

Question 10

Animals are diverse with many ____ of invertebrates. Major evolutionary developments include presence of tissues and layers, ____________ , and patterns of embryonic development (____ vs. ______)

Answer 10

Animas are diverse with many phyla of invertebrates. Major evolutionary developments include presence of tissue and layers, symmetry, and patterns of embryonic development(protostome vs. deuterostome)

Question 11

All mammals produce milk and have hair but ___________ lay eggs while ___________ give birth to underdeveloped young which mature in pouches and ___________ give birth to well developed young that are nourished for a longer time by the placenta of the mother.

Answer 11

All mammals produce milk and have hair but monotremes lay eggs while marsupials give birth to underdeveloped young which mature in pouches and eutherians give birth to well developed young that are nourished for a long time by placenta of the mother.