20 terms

Chapter 12- Reproductive Strategies For Survival

STUDY
PLAY
Altricial
A term used to describe offspring that are born without at least one of the following abilities: hear, see, move about, regulate body temperature, or eliminate waste.
Amnion
A thin, tough, membranous sac that encloses the embryo or fetus of a mammal, bird, or reptile. It is filled with a serous fluid in which the embryo is suspended.
Bower
A framework that supports climbing plants
Demersal
subaqueous; living underwater; sinking to the bottom
Disiccation
The process of drying or to cause tissue destruction by drying
Fecundity
the quality of something that causes or assists healthy growth
Harem Polygyny
females congregate in one area with an alpha male present, often for protection. example: elephant seals
Lek
Courtship grounds or arenas where animals aggregate into groups on communal courtship grounds
Marsupials
Mammals whose immature offspring complete their development in an external pouch.
Mass spawning
Multiple males and females release eggs and sperm all at once
Monogamy
A form of marriage in which one woman and one man are married only to each other.
Oviparity
describes organisms that produce eggs that develop and hatch outside the body of the mother
Pelagic
Describing organisms that live in the water column away from the ocean bottom.
Placenta
A structure that allows an embryo to be nourished with the mother's blood supply
Polyandry
A polygamous mating system involving one female and many males.
Precocial
A term used to describe offspring that are born able to hear, see, move about, regulate body temperature, and eliminate waste without a parent's help.
r-selection
Selection for life history traits that maximize reproductive success in uncrowded environments; also called density-independent selection.
Sedentary
A sedentary lifestyle is one that involves a lot of sitting around and not enough physical activity.
Vectors
An organism that transmits disease by conveying pathogens from one host to another
Zooplankton
Tiny floating organisms that are either small animals or protozoa