Which of the following processes would result from a mutation that deactivates a regulatory gene of a repressible operon in an E. coli cell?

#Question id: 11743

#Unit 6. System Physiology – Plant

The wall between the two mature sieve tube elements contain a sieve plates, these sieve plate pores are open —that is, unobstructed by

#Question id: 5634

#Unit 5. Developmental Biology

Which of the following are not released from cortical granules during prevention of polyspermy

#Question id: 4731

#Unit 8. Inheritance Biology

A pure-breeding strain of squash that produced disk-shaped fruits was crossed with a pure breeding strain having long fruits. The F1 had disk fruits, but the F2 showed a new phenotype, sphere, and was composed of the following proportions

Disk  384            

Sphere 96

 Long  32

What is reason for F2 phenotype?

#Question id: 11325

#Unit 10. Ecological Principles

Some great basin deserts are located on the leeward sides of large mountain ranges. We would describe these deserts as being located in the __________ of these mountains.

#Question id: 7703

#Unit 9. Diversity of Life Forms

Carolus Linnaeus believed that species remained fixed in the form in which they had been created. Linnaeus would have been uncomfortable with ________.