DNA contains the template needed to copy itself, but it has no catalytic activity in cells. What catalyzes the formation of phosphodiester bonds between adjacent nucleotides in the DNA polymer being formed during DNA replication?

TLS Online TPP Program

#Question id: 11327

#Unit 10. Ecological Principles

What do podzolized and laterized soils have in common?

TLS Online TPP Program

#Question id: 11328

#Unit 10. Ecological Principles

The __________ zone is the shallow area around the edge of a lake or pond with rooted vegetation, such as water lilies and pickerelweed.

TLS Online TPP Program

#Question id: 11329

#Unit 10. Ecological Principles

Which of the following aquatic systems is like a tropical rain forest because of its richness of biological production and diversity of inhabitants?

TLS Online TPP Program

#Question id: 12426

#Unit 10. Ecological Principles

In an ecosystem, fixed carbon has accumulated in the form of organic matter derived from dead plants and animals. Which of the following is the best explanation for this observation? 

TLS Online TPP Program

#Question id: 12427

#Unit 10. Ecological Principles

Trophic efficiency is

TLS Online TPP Program

#Question id: 12428

#Unit 10. Ecological Principles

Flycatcher birds that migrate from Africa to Europe feed their nestlings mostly with moth caterpillars. The data presented show the mean dates of egg laying, hatching, and fledging of flycatcher young, and the 1980 and 2000 peak mass of caterpillars.

Why are ecologists  concerned about the shift in  date from May 28 in  1980 to May 15 in  2000 of the caterpillar peak mass?