Senior Exam

According to the tetra nucleotide hypothesis, the (A+T):(G+C) is always?

1:1

meiosis is important because of

A & C; crossing over and a reduction in chromosome number

A bunch of professors were sitting around wondering why their students don't perform better on final exams. Dr. Noitall thinks, "I'll bet it is because students wait until the last few days to start studying." Dr. Noitall therefore suggested ?

A hypothesis

which of the following is NOT a basis of the theory of evolution by means of natural selection? A. individuals vary B. cells are the basic unit of life C. some of the differences among organisms are inherited D. more organisms are produced than can live to grow up and reproduce

B. cells are the basic unit of life

which one of the following statements about the coelom is false? The coelom... A. is a fluid filled body cavity B. develops as a space within the ectoderm of higher animals C. separates muscles of the gut from muscles of the body wall D. is filled with fluid that sometimes acts as a simple circulatory system

B. develops as a space within the ectoderm of higher animals

DNA replication along the 5' to 3' template strand ?

Both B & C, is discontinuous and forms a lagging strand

which one of the following statements about evolution and natural selection is false? A. natural selection varies upon genetic variability within a population B. natural selection relies upon randomly generated variety C. organisms develop new structures to meet an anticipated need D. most adaptations represent a compromise of form and function

C. organisms develop new structures to meet an anticipated need

Snails that meat dead leaves on a forest floor are examples of ?

Detritivores

which one of the following (if any) is NOT influenced by surface to volume ratio? A. the size of cells B. absorption of nutrients in digestive systems C. exchange of gases in respiratory systems D. the loss of heat or water from an animal's body surface E. all of the above are affected by surface to volume ratios

E. all of the above are affected by surface to volume ratios

which one of the following statements about human evolution is/are true? A. upright posture and an enlarged brain evolved in unison B. humans first evolved in Africa C. human evolution is like a ladder, with a series of steps leading directly from an ancestral anthropoid to modern humans D. human ancestors were chimpanzees E. all of the above are true

E. all of the above are true

In the evolution of dinosaurs, feathers first appeared as tiny structures, which formed a thin insulating layer. These early feathers clearly had no role in flight. Only later do we see the elaborate feathers on wings, which would have permitted flight. This shift in function of feathers, from an insulating structure to a large aerodynamic surface involved flight, best represents?

Exaptation

which of the following is not a plant hormone? A. auxin B. giberillins C. Kinetins D. Abscisic acid E. ethylene F. they are all plant hormones

F. they are all plant hormones

"Nongenetic characteristics that can prevent interbreeding when two related populations come to occupy the same area" is roughly the definition of Dobzhansky used for what he called?

Isolating mechanisms

Who is considered to be the "Father of Genetics"?

Mendel

When two animals live together, each one helping the other out, it is an example of ?

Mutualism

what is the relationship of oxygen production in photosynthesis?

Oxygen is a byproduct of hydrolysis

The Hershey and Chase experiment with p3^2 and S35 demonstrated what?

Phage DNA enters the host cell

which one of the following phyla has no anus or no coelom?

Platyhelminthes

crossing over takes place during which phase of meiosis

Prophase I

which one of the following single words best describes how evolution occurs?

Reactive

most filter-feeding animals are ?

Sessile, living in an aquatic environment

The concept that species must keep evolving just to maintain proper fitness is called ?

The Red Queen Hypothesis

which one of the following phyla is a protostome with a one-way digestive tract?

annelida

Control treatments of an experiment differ from the experimental group ?

by only the factor being tested

which of the following is the portion of bases that reads the mRNA?

codons

which of the following terms is MOST appropriately applied to the concept of "adaptation"?

deliberate or compromise

James Watson and Francis Crick?

discovered the structure of DNA

the lining of the gut comes from which one of the following layers?

endoderm

Evolution is the result of an interaction between an organism and its ?

environment

which of the following is a tetrapod anamniote?

frog

who first suggested that life changes over time, and that it evolves?

greek philosophers

embryology has revealed that vertebrates from different groups must look most similar to each other ?

in the earliest embryonic stage

In an alteration of generation lifecycle (seen in many plants), what has to initially happen to produce haploid cells?

meiosis

I have a plant and I'm wondering what group of plants it belongs to. I cut the stem to see scattered vascular bundles. I must have a ?

monocot

water movement through a plant is driven by a ?

negative water potential

an ant the size of a person could ?

none of the above

which one of the following phyla includes bilaterally symmetric animals with a digestive tract, which if present, has only one opening?

platyhelminthes

How do the food produced produced by photosynthesis move through a plant?

pressure-flow hypothesis

which one of the following animals is an echinoderm?

sea urchin

replication is?

semi-conservative

a secondary metabolite is

something with no direct function in growth and development

which one of the following terms is most appropriate to science?

tentative

Which of the following pairs of structures are analogous but not homologous?

the down feathers of a baby goose and the hair of beaver

the genotype of an organism is BEST described as?

the gene combination that an organism possesses

The source of nearly all genetic variation in a sexually reproducing population is?

the recombination of existing alleles during reproduction

a person with an additional chromosome number 13 is said to have?

trisomy

which of the following is an example of a secondary meristem ?

vascular cambium, phellogen, and cork cambium

Reduced pelvic bones and hind limb bones in whales best illustrate?

vestigial structures

as cell size increases ?

volume increases faster than surface area

which of the following pairs of structures best represent convergent evolution?

webbed toes of a duck and a beaver