Week 9 Animal Nutrition/Reproduction Flashcards
Asexual Reproduction?
One d- parent
No f-
diploid
fertilisation
Asexual: Regeneration
Fragmentation?
B- into many f- that become a new a-
Regeneration - of individuals from body parts?
Pr- of r-, r-
Breaking
fragments
animal
Process
renewal
restoration
Asexual: Budding?
New o- develops from an o- or bud due to cell d- at one particular site
organism
outgrowth
division
ASEXUAL: Parthenogenesis?
they P- seeds that cant be f-
Females only spec
Produce
fertilised
Advantages of Asexual Reproduction?
Rapid p- growth
Successful c-
No need to bring t- p- together
population
coloniser
two
parents
Disadvantages of Asexual Reproduction?
No m-
Cant e-
Will reach c- capacity
No myosis
Cant evolve
Will reach carrying capacity
Advantages of Sexual Reproduction?
Involves p- care
parental
Ovum?
is large with s- y- and generally n-
made in the ovary
stored
yolk
nonmotile
Sperm?
are usually s-, m- and more n-
small
motile
numerous
SEXUAL REPRODUCTION: HERMAPHRODITISM?
Produce both male and female g-
gametes
Protandry?
male female (e.g. clown fish)
Protogyny?
female male (e.g. blue wrasse)
Gametogenesis?
The production of g- by g- cells in the g- (testes and ovaries)
gametes
germ
gonads
Monotremes (oviparous)?
Egg laying m-
mammals
Marsupial (viviparous)?
Need to rely on m-
mother
Sexual Reproduction Fertilisation?
External -
Eggs shed by the female are fertilised by sperm in the external environment.
Parents don’t need physical contact.
Enormous number of gametes released.
Internal -
Sperm are deposited in or near the female reproductive tract.
Fewer gametes but the higher survival.
Associated with protection of embryos and parental care of young.
Strategies for sexual reproduction?
I- - Intermediate larval stages
D- - Parents are internal fertilisers
Indirect
Direct
Placental? (viviparous)
Prolonged g- and lactation
gestation
