chapter 1-2
the smallest structural and functional unit of an organism typically ________ and ________.
microscopic and consisting
makes enzymes that break down old cell parts or invading bacteria
Lysosome
chromosomes shorten and thicken, nuclear membrane dissolves
; nuclear membrane dissolves, spindle fibers form
B; metaphase- chromosomes line up along equator
_______ deoxyribonucleic acid, double stranded, found in nucleus, master instructions for the cell (making proteins) RNA- ribonucleic acid, single stranded, copy of DNA that takes the DNA code outside of the nucleus so that the proteins can be built
DNA
forelimb of bat, human, alligator, penguin- similar structure, different function- 1 bone, 2 bones, many bones, digits
Homologous structures
any of the distinct types material witch ________ or _________ are made.
animals or plants
provides protection, structure and support (not found in animal cells)
Cell wall
missing a chromosome Turner Syndrome X chrom
A; Monosomy
________ has a similar structure except the sugar is ribose and the base thymine is replaced with uracil
RNA
Ecology- the study of interactions between organisms and their environment
A; Ecology
How many electrons can the first level hold
2 electrons
openings in the nuclear membrane that allow things in/out
Nuclear pores
having an extra chromosome Ex Down Syndrome chrom 21
trisomy
(gene splicing)- DNA from 2 different organisms combined
Recombinant DNA
different species utilize the same resource by dividing or “sharing” it.
Resource partitioning
How many electrons can the second level hold
8 electrons
provide structure in all cell membranes double layer
Steroids include cholesterol which is also found in the cell membrane
Saturated fatty acid generally solid at room temp butter lard grease
phospholipids
heterozygous- 2 different alleles
Aa
Restriction enzymes- cut DNA at a specific location or sequence (scissors)
Restriction enzyme
are alien species that also end up showing exponential growth and overtaking their new habitat.
A; invasive species
How many electrons can the third level hold
18 electrons
factors that affect the rate of photosynthesis
A; amount of light
B; amount of CO2
C; temperature
Homozygous- 2 of the same alleles ______ or ______
(aa) or (AA)
the location where the restriction enzyme cuts
Recognition sequence
Ecology- the study of interactions between organisms and their environment
Ecology