fertilization

Question 0

internal fertilization

Answer 0

inside body
mostly on land
fewer eggs
still many sperm
ex land animals, Sharks, lobsters

Question 1

external fertilization

Answer 1

outside body
in water
many egg many sperm, lack of protection
ex. fish and amphibians

Question 2

parthenogenesis

Answer 2

development of an unfertilized egg into and adult

ex some insects

Question 3

external development in water

Answer 3

fish and amphibians, yolk in egg source of food, O2 diffuses in from water, waste diffuse out, little of no parental care, survival rate is low

Question 4

external development on land

Answer 4

yolk is a source of food, better survival rate, fewer eggs, birds and reptiles

Question 5

internal development

Answer 5

involves growth of embryo within the body of the parent, high survival rate

Question 6

internal placenta

Answer 6

umbilical cord: connects fetus to placenta
placenta: organ rich in blood vessels of mother and embryo, attached to the wall of the uterus, allows movement of nutrients oxygen and carbon dioxide by diffusion and active transport

Question 7

internal non placenta

Answer 7

marsupials: pouched mammals
internal development without placenta attachment , embryo gets food from yolk in egg, born before development is complete, completes development in pouch on outside, mammary glands are source of nutrients in pouch
ex kangaroos

Question 8

fish

Answer 8

external fertilization, external development, lots of eggs, no parental care

Question 9

amphibians

Answer 9

external fertilization, external development, lots of eggs, no parental care

Question 10

reptiles

Answer 10

internal fertilization, external development, many eggs, some parental care

Question 11

birds

Answer 11

internal fertilization, external development, few eggs, much parental care

Question 12

mammals

Answer 12

internal fertilization, internal development, few eggs, most parental care