Biology Praxis 5236 exam questions with
answers
interspecific competition - ....🔰VERIFIED ANSWERS.... ✔✔between
members of the same species.
intraspecific competition - ....🔰VERIFIED ANSWERS.... ✔✔between
members of different species.
carrying capacity - ....🔰VERIFIED ANSWERS.... ✔✔Largest number of
individuals of a population that a environment can support
positive feedback system - ....🔰VERIFIED ANSWERS.... ✔✔a process that
results in a response that enhances the original stimulus
negative feedback system - ....🔰VERIFIED ANSWERS.... ✔✔a process that
results in a response that reverses the original stimulus
polygenic traits - ....🔰VERIFIED ANSWERS.... ✔✔traits controlled by two or
more genes
pleiotropic traits - ....🔰VERIFIED ANSWERS.... ✔✔multiple (seemingly
unrelated) traits controlled by a single gene
,What do capillaries do? - ....🔰VERIFIED ANSWERS.... ✔✔-Capillaries are
really small
-Arteries branch into capillaries
-They carry the blood really close to every cell in the body to exchange
substances with them
-They have a permeable walls, so substances can diffuse in and out
-They supply food and oxygen and take away waste such as CO2
-Their walls are usually one cell thick which increases the rate of diffusion by
decreasing the distance over which it occurs.
Oparin-Haldane hypothesis - ....🔰VERIFIED ANSWERS.... ✔✔simple
molecules were changed by heat and solar radiation into more complex organic
biomolecules.
Early atmosphere was oxygen-poor, creating a reducing environment.
Monomers formed polymers like nucleic acids and peptides.
Polymers self-assembled into replication units and membranes.
SsYy x SsYy, what is the phenotype ratio of offspring? - ....🔰VERIFIED
ANSWERS.... ✔✔9:3:3:1
What happens during the G1 phase? - ....🔰VERIFIED ANSWERS.... ✔✔The
cell grows larger and makes copies of organelles.
G2 phase of interphase - ....🔰VERIFIED ANSWERS.... ✔✔Last phase of
interphase in which cell organelles are duplicated in preparation for cell
division
, Prophase - ....🔰VERIFIED ANSWERS.... ✔✔Chromosomes become visible,
nuclear envelop dissolves, spindle forms
S phase of interphase - ....🔰VERIFIED ANSWERS.... ✔✔chromosome
replicate and DNA synthesizes
Which organisms have a cell wall? - ....🔰VERIFIED ANSWERS.... ✔✔Fungi
(basidiomycetes) and bacteria (e.coli)
Energy pyramids - ....🔰VERIFIED ANSWERS.... ✔✔a diagram that shows the
energy that is available at each level of an ecosystem, with the highest energy
at the bottom with the producers.
What do nucleosomes do? - ....🔰VERIFIED ANSWERS.... ✔✔They are
chromatin wrapped around 8 histones. They help supercoil DNA.
blastocyst - ....🔰VERIFIED ANSWERS.... ✔✔stage of early development in
mammals that consists of a hollow ball of cells, where a fluid-filled cavity
forms in the center of the morula.
morula stage - ....🔰VERIFIED ANSWERS.... ✔✔solid ball of cells, before
cleavage forms the blastocyst.
primary producers - ....🔰VERIFIED ANSWERS.... ✔✔An autotroph, usually a
photosynthetic organism. Collectively, autotrophs make up the trophic level of
an ecosystem that ultimately supports all other levels.
answers
interspecific competition - ....🔰VERIFIED ANSWERS.... ✔✔between
members of the same species.
intraspecific competition - ....🔰VERIFIED ANSWERS.... ✔✔between
members of different species.
carrying capacity - ....🔰VERIFIED ANSWERS.... ✔✔Largest number of
individuals of a population that a environment can support
positive feedback system - ....🔰VERIFIED ANSWERS.... ✔✔a process that
results in a response that enhances the original stimulus
negative feedback system - ....🔰VERIFIED ANSWERS.... ✔✔a process that
results in a response that reverses the original stimulus
polygenic traits - ....🔰VERIFIED ANSWERS.... ✔✔traits controlled by two or
more genes
pleiotropic traits - ....🔰VERIFIED ANSWERS.... ✔✔multiple (seemingly
unrelated) traits controlled by a single gene
,What do capillaries do? - ....🔰VERIFIED ANSWERS.... ✔✔-Capillaries are
really small
-Arteries branch into capillaries
-They carry the blood really close to every cell in the body to exchange
substances with them
-They have a permeable walls, so substances can diffuse in and out
-They supply food and oxygen and take away waste such as CO2
-Their walls are usually one cell thick which increases the rate of diffusion by
decreasing the distance over which it occurs.
Oparin-Haldane hypothesis - ....🔰VERIFIED ANSWERS.... ✔✔simple
molecules were changed by heat and solar radiation into more complex organic
biomolecules.
Early atmosphere was oxygen-poor, creating a reducing environment.
Monomers formed polymers like nucleic acids and peptides.
Polymers self-assembled into replication units and membranes.
SsYy x SsYy, what is the phenotype ratio of offspring? - ....🔰VERIFIED
ANSWERS.... ✔✔9:3:3:1
What happens during the G1 phase? - ....🔰VERIFIED ANSWERS.... ✔✔The
cell grows larger and makes copies of organelles.
G2 phase of interphase - ....🔰VERIFIED ANSWERS.... ✔✔Last phase of
interphase in which cell organelles are duplicated in preparation for cell
division
, Prophase - ....🔰VERIFIED ANSWERS.... ✔✔Chromosomes become visible,
nuclear envelop dissolves, spindle forms
S phase of interphase - ....🔰VERIFIED ANSWERS.... ✔✔chromosome
replicate and DNA synthesizes
Which organisms have a cell wall? - ....🔰VERIFIED ANSWERS.... ✔✔Fungi
(basidiomycetes) and bacteria (e.coli)
Energy pyramids - ....🔰VERIFIED ANSWERS.... ✔✔a diagram that shows the
energy that is available at each level of an ecosystem, with the highest energy
at the bottom with the producers.
What do nucleosomes do? - ....🔰VERIFIED ANSWERS.... ✔✔They are
chromatin wrapped around 8 histones. They help supercoil DNA.
blastocyst - ....🔰VERIFIED ANSWERS.... ✔✔stage of early development in
mammals that consists of a hollow ball of cells, where a fluid-filled cavity
forms in the center of the morula.
morula stage - ....🔰VERIFIED ANSWERS.... ✔✔solid ball of cells, before
cleavage forms the blastocyst.
primary producers - ....🔰VERIFIED ANSWERS.... ✔✔An autotroph, usually a
photosynthetic organism. Collectively, autotrophs make up the trophic level of
an ecosystem that ultimately supports all other levels.
