Early observations of a cultured cell line indicated that the cells did not exhibit either density-dependent inhibition or anchorage dependence. What do these observations suggest about this cell line?

#Question id: 9237

#Unit 9. Diversity of Life Forms

Which of the following factors causes extremely high levels of toxic chemicals in fish-eating birds?

#Question id: 5922

#General Aptitude

#Question id: 8774

#Unit 9. Diversity of Life Forms

A large proportion of archaeans are extremophiles, so called because they inhabit extreme environments with high acidity, salinity, and/or temperature. Such environments are thought to have been much more common on primitive Earth. Thus, modern extremophiles survive only in places that their ancestors became adapted to long ago. Which of the following is, consequently, a valid statement about modern extremophiles, assuming that their habitats have remained relatively unchanged?

#Question id: 28829

#Unit 2. Cellular Organization

α-tubulin and β-tubulin comprising 445– 450 amino acids, which are tightly held together by__

#Question id: 10899

#Unit 6. System Physiology – Plant

Companion cells transport of photosynthetic products from producing cells in mature leaves to the sieve elements in the minor veins of the leaf. There are at least three different types of companion cells in the minor veins of mature, exporting leaves, All three cell types have dense cytoplasm and abundant mitochondria;