Practice Questions

TLS Online TPP Program

#Question id: 9185

Plants are affected by an array of pathogens. Which of the following is a plant defense against disease?

#Unit 9. Diversity of Life Forms

cells near the point of infection destroying themselves to prevent the spread of the infection
production of chemicals that kill pathogens
acquiring gene-for-gene recognition that allows specific proteins to interact so that the plant can produce defenses against the pathogen
All of the above are plant defenses against disease.

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TLS Online TPP Program

#Question id: 17658

#Unit 7. System Physiology – Animal

Which of the following is the most accurate description of stress?

TLS Online TPP Program

#Question id: 17659

#Unit 13. Methods in Biology

During your study of the gene for an enzyme you have isolated an amber mutation in the middle of the gene which produces a truncated form of the enzyme. By placing a +1 frameshift mutation a short distance before the amber mutation and a –1 frameshift mutation a short distance after the amber mutation you create a triple mutant that restores expression of a functional, full-length enzyme.

a) +1 frameshift puts the amber mutation out of frame so that it is no longer read as a stop.

b) -1 frameshift is inserted after the amber so that no longer read as a stop.

c) -1 frameshift is inserted after the amber to restore the frame of the end of the protein.

d) +1 frameshift puts the amber mutation out of frame so that it restore the frame of the end of the protein.

Which of the following is the correct prediction about the frame shift mutation?

TLS Online TPP Program

#Question id: 17666

#Unit 11. Evolution and Behavior

In the Mesozoic era, periods included;

i) Increase of dicotyledons

ii) Seeds ferns disappear

iii) Rapid development of angiosperms

iv) Spread of cycads and conifers

v) Gymnosperms declined

Find out the correct match of given period with their plants diversification events;

TLS Online TPP Program

#Question id: 17667

#Unit 11. Evolution and Behavior

Jurassic periods belong to the Mesozoic era has various characteristics of invertebrates and vertebrates animals except;

TLS Online TPP Program

#Question id: 17668

#Unit 9. Diversity of Life Forms

The most recent common ancestor of all land plants was probably similar to modern-day members of which group?

TLS Online TPP Program

#Question id: 17669

#Unit 9. Diversity of Life Forms

Use the letters A-D to label where on the phylogenetic tree each of the following derived characters appeared.