HighFour Biology
Category C: Grades 9 – 10
Round 5
Monday, January 9, 2017
The use of calculator is not required.
Answer#1:
Explanation:
aster
The aster is a radial array of short microtubules that extends from each
centrosome toward the plasma membrane in an animal cell undergoing
mitosis.
Answer #2:
Explanation:
behavior
Behavior is the action carried out by muscles or glands under control of
the nervous system in response to a stimulus. It is also the sum of an
animal’s responses to external and internal stimuli.
Answer #3:
Explanation:
facultative anaerobe
A facultative anaerobe is an organism that makes ATP by aerobic
respiration if oxygen is present, but can switch to anaerobic respiration
or fermentation if oxygen is not present. An obligate aerobe, by
contrast, cannot make ATP in the absence of oxygen, and obligate
anaerobes die in the presence of oxygen.
Answer #4:
Explanation:
amniotic egg
An amniotic egg is an egg that contains specialized membranes that
function in protection, nourishment, and gas exchange. It is named after
the amnion, which encloses a compartment of fluid that bathes the
embryo and acts as a hydraulic shock absorber.
Answer #5:
Explanation:
granum
A granum is a stack of membrane-bounded thylakoids in the chloroplast.
It functions in the light reactions of photosynthesis.
HighFour Biology
Category C: Grades 9 – 10
Round 5
Monday, January 9, 2017
The use of calculator is not required.
Answer #6:
Explanation:
competitive exclusion
Competitive exclusion describes what happens when two populations of
two similar species compete for the same limited resources: one
population will use the resources more efficiently and have a
reproductive advantage that will eventually lead to the elimination of
the other population.
Answer #7:
Explanation:
apicomplexans
Apicomplexans are protists under a clade that includes many species
that parasitize animals.
Answer #8:
Explanation:
biological magnification
Biological magnification is a process in which retained substances
become more concentrated at each higher trophic level in a food chain.
Answer #9:
Explanation:
monocot
A monocot is a member of a clade consisting of flowering plants with
one embryonic seed leaf or cotyledon.
Answer #10:
Explanation:
biogeography
Biogeography is the study of the past and present geographic
distribution of species.
HighFour Biology
Category C: Grades 9 – 10
Round 5
Monday, January 9, 2017
The use of calculator is not required.
Answer #11:
Explanation:
immigration
Immigration is the process of individuals moving into a range from
elsewhere.
Answer #12:
Explanation:
apoximis
Apoximis is the ability of some plant species to reproduce asexually
through seeds without fertilization by a male gamete.
Answer #13:
Explanation:
eyepiece / ocular lens
The eyepiece or the ocular lens is where the user places his eye to view
the magnified image of the sample.
Answer #14:
Explanation:
birth control pill
A birth control pill is a chemical contraceptive that prevents pregnancy
through several mechanisms, primarily by stopping ovulation.
Answer #15:
Explanation:
family
Family is the taxonomic category above genus and below order in the
Linnaean classification.
HighFour Biology
Category C: Grades 9 – 10
Round 5
Monday, January 9, 2017
The use of calculator is not required.
Answer #16:
Explanation:
aposematic coloration
Aposematic coloration is the bright warning coloration of many animals
with effective physical or chemical defenses.
Answer #17:
Explanation:
dominant species
Dominant species are those with substantially higher abundance or
biomass than other species in a community. They exert a powerful
control over the occurrence and distribution of other species.
Answer #18:
Explanation:
detritivores / decomposers
Detritivores or decomposers derive their energy and nutrients from
nonliving organic material, such as corpses, fallen plant material, and the
wastes of living organisms.
Answer #19:
Explanation:
Georges Cuvier
Georges Cuvier was a French naturalist and zoologist who developed
paleontology. He is also the main proponent of catastrophism.
Answer #20:
Explanation:
outgroup
An outgroup is selected so that its members are closely related to the
group of species being studied, but not as closely related as any studygroup members are to each other.