In order for male differentiation to occur during embryonic development, testosterone must be secreted from the testes. What stimulates the secretion of testosterone during embryonic development?

TLS Online TPP Program

#Question id: 5011

#Unit 9. Evolution & Diversity of Life Forms

A swim bladder is a gas-filled sac that helps fish maintain buoyancy. The evolution of the swim bladder from lungs of an ancestral fish is an example of

TLS Online TPP Program

#Question id: 5012

#Unit 9. Evolution & Diversity of Life Forms

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

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#Question id: 5013

#Unit 9. Evolution & Diversity of Life Forms

Following is correct match

Periods	Age of evolutionary event
A- Jurassic	I- Fish
B- Ordovician	II- Amphibian
C- Devonian	III- Gymnosperm
D-Carbonyferous	IV- Invertebrates

TLS Online TPP Program

#Question id: 5014

#Unit 9. Evolution & Diversity of Life Forms

 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

TLS Online TPP Program

#Question id: 5015

#Unit 9. Evolution & Diversity of Life Forms

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

TLS Online TPP Program

#Question id: 5016

#Unit 9. Evolution & Diversity of Life Forms

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