plants possess a second type of immunity mediated by a set of highly specific intracellular receptors known as nucleotide binding site–leucine rich repeat (NBS–LRR) receptors. How NBS–LRRs become activated,

#Question id: 9245

#Unit 9. Diversity of Life Forms

One characteristic that distinguishes a population in an extinction vortex from most other populations is that

#Question id: 10366

#Unit 6. System Physiology – Plant

Cyanobacteria can fixes nitrogen in an anaerobic conditions. Which of the following statements about heterocyst which is specialized cell of blue-green algae is incorrect?

#Question id: 11292

#Unit 10. Ecological Principles

In an pond ecosystem the _____ is always greater than the _____ .

(a) number of primary producers . . . number of secondary consumers

(b) biomass of secondary consumers . . . biomass of primary consumer

(c) assimilation efficiency of primary consumers . . . assimilation efficiency of secondary consumers

(d) biomass of primary producers . . . biomass of primary consumers

#Question id: 16480

#Unit 12. Applied Biology

#Question id: 32

#Unit 1. Molecules and their Interaction Relevant to Biology

 Humans maintain a nearly constant level of hemoglobin by continually synthesizing and degrading it. This is an example of a(n):