#Question id: 11653
#Unit 10. Ecological Principles
Given some characteristics of the climax community
i) Tolerate its own reactions
ii) Tends to become mesic
iii) Less stable
iv) Complex stratification
v) Simple food web
vi) Less mutualism
vii) Gross production is equals to community respiration
viii) Net community production is zero
Which of the following combination shows the characteristics of climax community?
#Question id: 4978
#Unit 11. Evolution and Behavior
The dicynodonts survived the mass extinction that was most closely correlated in time, if not in cause, with
#Question id: 1385
#Unit 4. Cell Communication and Cell Signaling
The ability of a population of fibroblasts to migrate along the surface of a tissue culture dish depends on adhesion between the cell surface and the extracellular matrix molecules coating the dish. The dish is coated with laminin, and the only cell-surface protein capable of binding laminin is a cell-adhesion protein called an integrin. Integrins are integral plasma-membrane proteins that function as heterodimers. Under these conditions the rate at which a fibroblast can migrate along the laminin coated culture dish is proportional to the strength of adhesion between the cell and the laminin substrate. The table below lists the rate of cell migration observed for fibroblasts genetically engineered to generate the indicated phenotypes.
Which of the following is the most likely explanation for failure of overexpression of the integrin alpha subunit to alter the rate of fibroblast migration?
#Question id: 304
#Unit 1. Molecules and their Interaction Relevant to Biology
As compared to covalent compounds electrovalent compounds generally possess ___________
#Question id: 11209
#Unit 7. System Physiology – Animal
Acetylcholine released into the junction between a motor neuron and a skeletal muscle binds to a sodium/potassium channel and opens it. This is an example of ________.