Practice Questions

TLS Online TPP Program

#Question id: 15146

You have isolated a set of five yeast mutants that form dark red colonies instead of the usual white colonies of wild-type yeast. You cross each of the mutants to a wild-type haploid strain and obtain the results shown below;
What do these results tell you about each of the mutants?

#Unit 8. Inheritance Biology

All the mutants 1, 2, 3, 4 and 5 are recessive to wild-type .
Mutants 1, 2, 3 and 5 are recessive to wild-type and mutant 4 is dominant to wild-type.
Mutant 4 is recessive to the wild type while the mutant 1, 2, 3 and 5 are recessive to wild-type.
Mutants 1, 2, 3 and 5 are dominant to wild-type and mutant 4 is recessive to wild-type

More Questions

#Question id: 5012

#Unit 11. Evolution and Behavior


A	Silurian	I	Seed plants appear
B	Devonian	II	Gymnosperms dominant
C	Carboniferous	III	Invasion of land by primitive land plants
D	Jurassic	IV	first reptiles

#Question id: 5013

#Unit 11. Evolution and Behavior

Following is correct match

#Question id: 5014

#Unit 11. Evolution and Behavior

Following geological time period and major evolutionary event?

I. Devonian A. Gymnosperms dominant

II. Jurassic B. Amphibians diversify; first reptiles

III. Carboniferous C. Mammals appear

IV. Triassic D. Seed plants appear

#Question id: 5015

#Unit 11. Evolution and Behavior

During which of the following largest mass extinction recorded in the history of life on Earth.

#Question id: 5016

#Unit 11. Evolution and Behavior

Approximately how far back in time does the fossil record extend?

#Question id: 5017

#Unit 11. Evolution and Behavior

Arrange these events from earliest to most recent.

1. emission of lava in what is now Siberia at time of Permian extinctions

2. emission of lava that solidified at the same time as iron-bearing terrestrial rocks began to rust

3. emission of lava that solidified at the same time as rusted iron precipitated from seawater

4. emission of lava in what is now India at time of Cretaceous extinctions