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TLS Online TPP Program

#Question id: 5088

 If gastrulation was blocked by an environmental toxin, then ________.

#Unit 5. Developmental Biology

  1. cleavage would not occur in the zygote

  2. embryonic germ layers would not form

  3. the blastula would not be formed

  4. the blastopore would form above the gray crescent in the animal pole

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TLS Online TPP Program

#Question id: 11297

#Unit 10. Ecological Principles

What is the difference between gross and net primary production?
TLS Online TPP Program

#Question id: 11298

#Unit 10. Ecological Principles

A pyramid of numbers shows _____________.
TLS Online TPP Program

#Question id: 11299

#Unit 10. Ecological Principles

Carbon is initially incorporated into the food chain by _____________
TLS Online TPP Program

#Question id: 11300

#Unit 10. Ecological Principles

What type of organisms convert nitrates and nitrites into nitrogen gas?
TLS Online TPP Program

#Question id: 11301

#Unit 10. Ecological Principles

How is phosphorus returned to the soil from organic phosphorus?
TLS Online TPP Program

#Question id: 11314

#Unit 10. Ecological Principles

What type of organism produces acids that degrade rocks and minerals?