A single DNA strand has the code ATCGGGA. What is the code of its complementary strand?
TAGCCCT
100
Differentiate between a biotic and abiotic factor. Give an example of each.
alive; not alive
100
Differentiate between a genotype and phenotype. Give an example of each.
TT, tall
100
When a dairy farmer chooses to breed the cows that give the most milk in the heard, the farmer is following the principle of _________________.
Artificial selection
100
A 3-base sequence of mRNA.
What is a codon?
200
What is the chemical name for DNA?
Deoxyribonucleic acid
200
Differentiate between emigration and immigration
emigration = moving out
immigration = moving in
200
The mother is heterozygous for a "widow's peak." The father is homozygous recessive for a "widow's peak." If widow's peak is dominant, what is the probability their child will have a widow's peak?
50%
200
What is the principle of common decent? Give one piece of evidence to support this theory.
All organisms stem from a common ancestor. Embryology, DNA sequencing
200
A 3-base sequence found on tRNA.
What is an anticodon?
300
Identify the 3 components of a DNA nucleotide?
nitrogenous base, phosphate, deoxyribose sugar
300
Identify two ways that a population can decrease
Emigration and death rate
300
What is the name of the theory that a trait that can be turned on or off by environmental factors.
Epigenetics
300
Differentiate between convergent and divergent evolution. Give an example of each.
divergent - closely related species becoming different
convergent - distantly related species becoming similar due to similar environments and adaptations.
300
With RNA, A (adenine) binds with this other base.
What is U (uracil)?
400
What is the name for the type of bond that holds two strands of DNA together?
Hydrogen bonds
400
A biologist counts 45 walruses in a 85 square foot area. Using the sampling method to estimate the population, how many walruses are within a 2000 sq. foot area? Identify one problem with this method of estimating population size.
~1,059 walruses
400
A red flower (RR) is crossed with a white flower (WW). The resulting flower is pink. What is the name for this type of inheritance?
Incomplete dominance
400
What is a homologous structure? Give an example. What do homologous structures suggest?
similar structure, different function. Closely related
400
Most of the amino acids of a protein are incorrect due to this type of mutation.
What is a frameshift mutation?
500
He is credited with the discovery that the amount of G's was roughly equal to the amount of C's (and A's with T's) in several samples of DNA.
Who is Erwin Chargaff?
500
A biologist captures, tags, and releases 15 Steller Sea Lions. 1 year later, she recaptures 20 Steller Sea Lions. 5 of these have tags. What is the approximate population size?
60 Steller Sea Lions
500
A black chicken (BB) mates with a white chicken (WW). The offspring has black and white spots. What is this type of inheritance called?
Codominance
500
What is an analagous structure? Give and example.
Similar stx, different function. Not closely related