Which of the following is the best example of K- strategist species? A- Fruit Flies B- Fish C-...

Which of the following is the best example of K-strategist species?A- Fruit FliesB- FishC- HumansD-BeetlesE- Desert Annual Flowers

C-Humans

The role of oxygen in aerobic respiration is

A- The final hydrogen acceptor in the electron transport chain

B- in glycolysisC- in the Kreb CycleD-Exactly the same as a cytochromeE- To reduce NAD to NAD+

A- the final hydrogen acceptor in the electron transport chain

Cows belong to which trophic level?A- primary consumersB- producerC- decomposerD- carnivoreE- autotrophs

A- Primary Consumers

The frequency of crossing-over event occurring between any two linked genes isA-Proportional to the distance between themB- greater if the genes are sex-linkedC- higher if they are dominant and lower if they

are recessiveD- higher if the genes are in a maleE- higher if the genes are on separate

A- proportional to the distance between them

What kind of chemical bonds are found between the nitrogenous bases in a molecule of DNA?A- CovalentB- van der WaalsC- ionicD- hydrogen E- disulfide

D- hydrogen

Who was the author and naturalist who developed a theory of natural selection independently of Darwin and who is often credited along with Darwin for the theory we accept today?A- Linnaeus B- CuvierC- Lyell D- WallaceE- Lamarck

D- Wallace

Genetic Drift has the largest effect on allele frequencies when A- mating is randomB- the population is smallC- there is no migration, in or outD- there is no natural selectionE- there is no mutation

B- The population is small

Which extraembryonic membrane in birds is analogous to the placenta in mammals?A- ChorionB- AmnionC- EggshellD- AllantoisE- Yolk Sac

D- Allantois

Polymerase chain reaction would be carried out to accomplish which one of the following?

A- To prevent a virus from replicating B- To amplify a region of DNA C- to identify the location of a point mutation in

a genomeD- to identify a chromosome mutationE- to prepare a specimen of DNA for X-ray

diffraction

B- to amplify a region of DNA

All of the following structures are adaptations specifically for life on land EXCEPTA- XylemB- rootsC- waxy cuticleD- seedsE- cell walls

E- Cell Walls

All of the following are correct about enzyme-catalyzed reactions EXCEPTA- phosphofructokinase is inhibited by ATPB- Enzymes speed up reactions by supplying

necssary energyC- enzymes lower the energy of activationD- enzymes often require the presence of

mineralsE- all enzymes are not active at the same pH

B- enzyme speed up reactions by supplying necessary energy

Pinching back a plant, removing the new leaves at the top, results in the plant growing bushier. This happens because when the new leaves are removed, ____________ is removed as well.A- GibberellinsB- cytokininsC- auxinsD- ethyleneE- abscisic acid

C- Auxins

All of the following are true about cellular respiration EXCEPTA- NAD+ is reduced to NADH during both

glycolysis and the Kreb CycleB- in the absence of NAD+, glycolysis cannot

occurC- ATP is produced by substrate level

phosphorylation during electron transport chainD- the most important product of glycolysis is ATPE- lactic acid is converted back to pyruvic acid in

the liver

D- the most important product of glycolysis is ATP

Which is correct about the person from whom this karotype was taken?A- Person has Klinefelter’s syndromeB-Person has sex-linked conditionsC- Person has Down’s SyndromeD- Person has hemophiliaE- The person has Turner’s syndrome

C- The person has Down’s syndrome

Oxygen is released…A- Light Dependent reaction (light reaction)B- Light independent reaction (Dark reaction)C- both light and dark reactionD- neither light or dark reaction

A- Light Dependent reaction (light reaction)

Photolysis occursA – Light dependent reaction (light reaction)B- Light Independent reaction (dark reaction)C- Both light dependent and light independent

reactionD- Neither light and light independent reaction

A- Light Dependent reaction (Light Reaction)

The population of peppered moths in England changed from white to black in less than 100 years. This is an example of A- directional selectionB- genetic driftC- disruptive selectionD- sexual selectionE- artificial selction

A- Directional Selection

The process by which some bacteria convert nitrate to free nitrogen is called A- ammonification B- nitrogen fixationC- denitrifying D- nitrifyingE- denitrogenation

C- Denitrifying

Which of the following is the dominant stage of the life cycle in moss?A- DiploidB- sporphyteC- flowering stageD- monoploid (haploid)E- none of the above is correct

D- Monoploid

In order to move from the right side of the heart to the left side of the heart, blood must pass through the A- mitral valveB- vena cavaC- right atrioventricular valveD- lungsE- aorta

D- Lungs

A diploid cell has three pairs of homologous chromosomes : AaBbCcDd. How many different gametes can this cell produce?A- 4B- 8C- 16D- 32E- 64

C- 16This type of problem can be solved by following this 2 raised to the power of the n umber of pair of alleles. There are four pairs of alleles, so 24 = 16

During the period when life is believed to have begun the atmosphere on primitive Earth contained abundant amounts of all the following EXCEPTA- oxygenB- hydrogenC- ammoniaD- methaneE- water

A- oxygen

Which of the following represents the correct sequence of events in embryonic development?A- Blastula –cleavage-morula- gastrula-neurulaB- Blastula – neurula – cleavage- morula-

gastrulaC- Cleavage- morula-blastula-neurula-gastrulaD- Cleavage- morula-blastula-gastrula-neurulaE- Morula- blastula-gastrula-cleavage- neurula

D- A fertilized egg undergoes a series of changes in the following order cleavage (first division of the zygote), morula (solid ball), blastula (hollow ball), gastrula (formation of three germ layers ), and neurula (formation of nervous system)

Chemical substances released by organisms that elicit a physiological or behavioral response in other members of the same species are known asA- Auxins B- hormonesC- phermones D- enzymesE- coenzyme

C- Pheromones

Hawkmoths are insects that are similar in appearance and behavior to hummingbirds. Which of the following is LEAST valid?A-These organisms are examples of convergent

evolutionB- These organisms were subjected to similar

environmental conditionsC- These organisms are genetically related to

each otherD- These organisms have analogous structureE- These organisms can survive in similar

habitats

C- These organisms are genetically related to each other

If an invertebrate possesses malpighian tubules, a tracheal breathing system, and an open circulatory system it is most likely to beA- snail B- spongeC- butterflyD- earthwormE- flatworm

C- butterfly