Heredity
The SRY gene is best described as ________.
What is the Sex determining Region on the Y?
Which of the following processes occurs as part of transcription? A) DNA is replicated B) RNA is synthesized C) proteins are synthesized D) mRNA attaches to ribosomes
B) RNA is synthesized
Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, which develop from similar embryonic tissues. These structural similarities are an example of ________.
Homology
A group of students walking through a coastal rainforest in Vietnam observe a large, beautiful tree towering above. The tree is full of orchids, mosses, birds, insects, arachnids, and millions of bacteria, all interacting with the abiotic environment, including the air, soil, and water of the forest. Which term bests describe this in the entirety of what they are observing?
ecosystem
An earthquake decimates a ground-squirrel population, killing 98% of the squirrels. The surviving population has broader stripes, on average, than the initial population. If broadness of stripes is genetically determined, which of the following processes most likely caused the change?
a bottleneck effect
Radish flowers may be red, purple, or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The flower color trait in radishes is an example of which inheritance pattern?
What is Incomplete Dominance?
Which molecular structure contain (triplet)codons?
Your professor wants you to construct a phylogenetic tree of a type of plant called orchids. She gives you tissue from seven orchid species and one lily plant. What is the most likely reason she gave you the lily?
to serve as an outgroup
In deep water, which abiotic factor would most limit primary productivity?
light availability
To apply parsimony to constructing a phylogenetic tree, ________.
choose the tree that represents the fewest evolutionary changes, in either DNA sequences or morphology (the least amount of assumptions)
Crossing over of chromosomes normally takes place during which phase of Meiosis?
What is Prophase I?
correctly describe alternative RNA splicing
It can allow the production of proteins of different sizes and functions from a single mRNA.
In a Hardy-Weinberg population with two alleles A1 and A2 that are in equilibrium, the frequency of the allele A2 is 0.3. What is the frequency of individuals that are homozygous for this allele?
If two species are close competitors, and one species is experimentally removed from the community, the remaining species would be expected to ________.
expand its niche to its fundamental nice
Which eukaryotic kingdom includes members that are the result of endosymbioses that included an ancient aerobic bacterium and an ancient cyanobacterium?
Plantae
A woman with normal vision whose father is color blind has children with a color-blind male. What is the probability that this couple's first son will be color blind?
1/2
A particular triplet of bases in the coding sequence of DNA is 5'-AAA-3'. The anticodon on the tRNA that binds the mRNA codon is ________.
3'-AAA-5'
The Dunkers are a religious group that moved from Germany to Pennsylvania in the mid-1700s. They do not marry with members outside their own immediate community. Today, the Dunkers are genetically unique and differ in allele frequencies at many loci from all other populations, including those in their original homeland. Which mechanism most likely explains the genetic uniqueness of this population?
founder effect
Dwarf mistletoes are flowering plants that grow on certain forest trees. They obtain nutrients and water from the vascular tissues of the trees. The trees derive no known benefits from the dwarf mistletoes, yet they are sometimes negatively affected by this interaction. What best describes the interactions between dwarf mistletoes and trees?
An mRNA molecule with the sequence 5′-CCG-ACG-3′is being read by a ribosome. During translation which tRNA anticodon will be the first to productively bind with this mRNA?
3′-GGC-5′
Albinism is a recessive trait. A man and woman both produce melanin, but both have one parent with albinism. What is the probability that their first child will have albinism?
1/4
What is most likely to occur if a researcher removes the 5′ cap and poly-A tail of an mRNA and inserts the mRNA molecule into a eukaryotic cell?
The molecule will be degraded by enzymes.
A researcher has maintained a small population of fruit flies in the laboratory by transferring the flies to a new culture bottle after each generation. After several generations, the viability of the flies decreased greatly. Recognizing that small population size is likely to be linked to decreased viability, which experiment would be the best way to reverse this trend of decreased viability?
cross the flies with flies from another lab
As you study two closely related predatory insect species, the two-spot and the three-spot avenger beetles, you notice that each species seeks prey at night when present in an area where the other beetle species is absent. However, where their ranges overlap, the two-spot avenger beetle hunts at night and the three-spot hunts in the morning. When you bring them into the laboratory, you discover that the offspring of both species are found to be nocturnal. Which conclusion is best supported by the evidence?
the two-spot beetle species may be competitively displacing the three-spot beetle species// Resource Partitioning
Many of the organisms in the ocean are nutrient-limited. What would be the most reasonable approach if you wanted to investigate this phenomenon?
experimentally enrich some areas of the ocean and compare their productivity to that of untreated areas