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1 Which of the following is associated with bilateral symmetry?
A) a definite ‘head end'
B) stationary life style
C) lack of organs
D) lack of true tissues
2 A distinguishing feature of vertebrates is the presence of ______
A) legs
B) a backbone
C) a gastrovascular cavity
D) a post anal tail
3 Which vertebrate is considered the first tetrapod to colonize land?
A) lungfishes
B) amphibians
C) reptiles
D) mammals
4 Which of the following animals has an exoskeleton?
A) octopus
B) starfish
C) earthworm
D) grasshopper
5 The evolution of humans included which of the following?
A) development of good depth perception
B) providing parental care
C) increased brain size
D) development of nails to replace claws
6 Humans are classified into the ____________ phylum.
A) chordate
B) arthropod
C) primate
D) echinoderm
When a sperm cell comes into contact with an egg cell, there is a change in the electrical charge across plasma membrane and various channel proteins close. What are these channels known as.
Suppose that RNA polymerase will read the top strand of DNA as the template to synthesize mRNA. What will be the sequence of the mRNA synthesized?
In the fruit fly Drosophila, a rudimentary wing called "vestigial" and dark body color called "ebony" are inherited at independent loci and are recessive to their dominant wild-type counterparts, full wing and gray body color. Dihybrid wild-type m..
What changes do the promoter and the polymerase undergo during the transition from a closed to an open complex? What drives this transition in prokaryotes, and in eukaryotes.
if a mouse expresses the albino trait, it is albino regardless of the alleles at the other locus. This is because it does not produce the pigments necessary for either agouti or black coloration.
A scientist has discovered a new cell. illustrate, in detail, ALL the ways the scientist could decide if the cell comes from a plant or an animal. How several of these result in the release of oxygen into the atmosphere?
How do you find the concentration of a solution when given the info that the concentration of the stock solution is 1:57 and has a concentration of 5mg/ml.
In Drosophila melanogaster, a gene "ebony" produces a dark body colour when homozygous, and an independently assorting gene "black" has a similar effect (that is the black and ebony body colours are indistinguishable).
Write out the reactions of the glycolytic pathway starting from glucose to pyruvate. Starting with radiolabeled glucose labeled in the C1 position, where does the label ends up in pyruvate? (e.g. use a highlighter pen or an asterisk)
Use a chi-square test to evaluate whether the two loci are linked or assort independently.
discuss the importance of the proof-reading function of the bacterial replication DNA polymerase.
The allele l in Drosophila is recessive, sex-linked, and lethal when homozygous or hemizygous (the condition in males). If a female of genotype L/l is crossed with a normal male, what is the probability that the first two surviving progeny will be..
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