topic 4 definitions Flashcards
behavioral adaptations
An adaptation that changes a away an organism behaves
Antatomical adaptations
An adaptation that you can see either by observing the organism or by dissecting it
physiological adaptations
An adaptation of a process within the organisum
Niche
a description of a precise role of an organisum in it’s ecosystem
Where it is and what it does
endemic species
A species limited to one area
Allele frequency can change over time due to:
Natural selection (caused by selection pressures
gentetic drift (caused by chance)
gene flow (caused by migration)
sexual selection (caused by mating preferences)
middle lamella
a layer that cements neighboring cell wall together using calcium and magnesium pectate
Why would natural selection speed up
low gestation period
selection pressures (change in environment)
Higher reproduction rate
high numbers of off spring
long lifespan (more time to breed)
pits
thinner portion of the cell walls that can be used to communicate or exchange fluid
plasmodesmata
cytoplasmic canals that allow direct communication of molecules between cells
Amyloplast
storage of starch granules
tonoplast
membrane that surrounds the permanent vacuole
equation for magnification
image size/ actual size
in plants water is used for
photosynthesis
maintaining turgidity
dissolving and transporting ions
chemical reactions- eg hydrolysis of starch
in plants mineral ions are used for
magnesium- chlorophyll
calcium- calcium pectate- middle lamella
nitrogen-needed for DNA and amino acids
