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BIOLOGY
HIGH SCHOOL
At a synapse, adequate stimulation causes the presynaptic cell to release which of the following?Action potentials that bind to receptors on the postsynaptic cellNeurotransmitter that bind to axons on the postsynaptic cellAction potentials that bind to axons on the postsynaptic cellNeurotransmitters that bind to receptors on the postsynaptic cellI think this one isd.
BIOLOGY
HIGH SCHOOL
An anthropologist finds a fossil that is 4 million years old. Its pelvis suggests it walked upright. Which species could the specimen belong to?Australopithecus africanusAustralopithecus afarensisHomo habilisHomo erectus
BIOLOGY
HIGH SCHOOL
During DNA replication, which sequence of nucleotides will bond to the sequence ACGTAT?A. UGCAUAB. TCGATAC. UCGUAUD. TGCATA
BIOLOGY
HIGH SCHOOL
Plants seemed to evolve in which order?
BIOLOGY
HIGH SCHOOL
20. Which of the following accurately describes carbon atoms? A. Carbon atoms are only found in two of the four main macromolecules. B. Carbon atoms only have three electrons available for bonding. C. Carbon atoms can bond to other carbon atoms. D. Carbon atoms can only form triple bonds with other carbon atoms.
BIOLOGY
HIGH SCHOOL
Suppose that species A evolves and species B evolves in response to the changes in Species A. Species A then changes in response to the changes in Species B. This is an example of
BIOLOGY
HIGH SCHOOL
What is it called when two forms of a trait are both dominant at the same time
BIOLOGY
HIGH SCHOOL
Which definition best describes a base?A. A substance in a solution that releases hydrogen ions and lowers the pHB. A substance in a solution that captures hydrogen ions and raises the pHC. A substance in a solution that releases and captures hydrogen ions, keeping the pH the sameD. A substance in a solution that provides color over a narrow range of pH
BIOLOGY
HIGH SCHOOL
the --- of a star determines its temperature and luminosity. A. density. B. mass. C. location. D. width
BIOLOGY
HIGH SCHOOL
Wildlife is plentiful in the pineywoods. There are over 100 species of birds and many small mammals, like cottontail rabbits and squirrels. What else MUST be included in the pineywoods habitat to keep populations in balance?
BIOLOGY
HIGH SCHOOL
In what phase of meiosis are sister chromatids separated and pulled to opposite ends of the cell
BIOLOGY
HIGH SCHOOL
Bacteria share genetic material through the processes called bacterial conjugation, transformation, and ______.A. TransductionB. ConductionI'm thinking it's probably A, but I'm not sure....
BIOLOGY
HIGH SCHOOL
Which of the following accurately describes the pH scale? A. The lower the pH is, the more basic the solution is. B. The lower the concentration of hydrogen ions, the higher the acidity is. C. The greater the concentration of hydroxide ions, the higher the acidity is. D. The greater the pH is, the lower the acidity is.
BIOLOGY
HIGH SCHOOL
1. Which of the following is responsible for transmitting an impulse across a synapse to another cell?
BIOLOGY
MIDDLE SCHOOL
A rabbit is carrying a dominant allele for brown hair (B) and a recessive allele for white hair (b). What is the rabbit's genotype?A.) brown hairB.) white hairC.) B bD.) B BI think it's C :)HELP ME
BIOLOGY
HIGH SCHOOL
The use of wells to obtain drinking water is a modern convenience. Is this true or false?
BIOLOGY
HIGH SCHOOL
Aristotle contributed to the science of taxonomy when he classified animals in two groups and plants in _____ groups. 3 4 5 2
BIOLOGY
HIGH SCHOOL
Bottleneck events are always caused by the death of most of a species’ population. Please select the best answer from the choices provided T F
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