Unit 1.3 Flashcards
What types of words should we use when talking about natural selection
“more likey to” or “less likely to”
Describe the little chart of Natural Selection
is Environment-> selects for -> Genetic Material -> produces -> Traits -> interact with -> environment
and selection is based on fitness
Genes that produce traits that tend to increase fitness are _______ to be selected by the environment
more likely
genes that produce traits that tend to ——– fitness are less likely to be selected by the environment
decrease
We are linking the environment and biota .. how?
by considering relationships between organisms, energy, and matter
there are 3 major concepts about organisms, energy and matter. whats the first one.
energy flow in ecosystems is linear, and not a circle
there are 3 major concepts about organisms, energy and matter. whats the second one.
matter constantly recycles and moves in numerous cycles withing and among ecosystems
there are 3 major concepts about organisms, energy and matter. whats the third one.
the abiotic environment will ultimately determine whre na dhow successfully species live
matter def
anything with mass that takes up space
energy def
the capacity to do work
energy ex
chemical, heat, radiant, electrical, etc
work def
any change in the state or motion of matter
1st law of thermodynamics
energy cannot be created or destroyed. although it can be transffered or changed
2nd law of thermodynamics
entropy tends to increase
entropy def
is the state of disorder
all living things require what
energy
all systems tend to go towards what
entropy
all systems are not _____- into chas
spontaneously expoding
why do all biological systems require energy
to advoid entropy and to do work
how do organisms most efficiently acquire and process energy
by maintaining consistency (most effective)
what do organisms attempt to do when the external environment changes
maintain a steady internal environment
Homeostasis def
maintenance of a relatively constant interal environment despite the external environment
what are the big 3 terms
natural selection, fitness, homeostasis
why is the body at 98.6
to let the body be optimal, so that energy can be used elsewhere
what is homeostatis
the optimal balnce, as well as it is a trait
is the relationship btwen organisms and temperature important
yes
what does temp do
regulate all kinds of things
poikilotherm def
have variable internal temperatures
homeotherms def
have realtively constant internal temperatures
ectotherms def
use the external environment to maintain internal temperatures