Practice Questions

TLS Online TPP Program

#Question id: 4656

Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?

#Unit 11. Evolution and Behavior

None of the organisms depicted by the tree ate the same foods.
Some of the organisms depicted by the tree had lived in different habitats.
The skeletal remains of the organisms depicted by the tree were incomplete (i.e., some bones were missing).
Relationships between DNA sequences among the species did not match relationships between skeletal patterns.

More Questions

#Question id: 4689

#Unit 3. Fundamental Processes

Cleavage liberates precursors of rRNAs and tRNA Cleavage at the points that is carried out by the enzymes excepts

#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: 5671

#Unit 5. Developmental Biology

Match the following mechanism of polyspermy (Column I) with events (Column II).

Column I	Column II
A. Fast block to polyspermy	i. chemicals from the fusing sperm cytoplasm alter the sodium ion (Na+) channels on the membrane
B. Slow block to polyspermy	ii. enzyme cortical granule serine protease, cleaves the protein posts that connect the vitelline envelope
	iii the concentration of free Ca2+ in the egg cytoplasm increases
	iv. an electric change in the egg cell membrane
	v. the concentration of free Na+ in the egg cytoplasm increases

Which of the following is correct?

#Question id: 15367

#Unit 4. Cell Communication and Cell Signaling

#Question id: 23328

#General Aptitude