Membranes of some thermophilic Archaea are stabilized by ether linked phospholipids.

Answer the following statement true (T) or false (F)


True

Biology & Microbiology

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An earthquake decimates a ground-squirrel population, killing 98% of the squirrels. The surviving population happens to have broader stripes, on average, than the initial population. If broadness of stripes is genetically determined,

what effect has the ground-squirrel population experienced during the earthquake? A) directional selection B) disruptive selection C) a founder event D) a genetic bottleneck E) gene flow

Biology & Microbiology

All the following statements about the concept of niche are true, EXCEPT -

a) A niche is the range of conditions an organism can survive in b) The fundamental niche is always a subset of the realized niche c) The niche of an organism is influenced by predators and competitors d) The fundamental niche is all the environmental conditions that allow a species to maintain a stable population size e) None of the above (all are true)

Biology & Microbiology

A central vacuole

(a) is found only in plant cells. (b) may take up between 50% and 90% of the cell’s interior. (c) regulates water balance. (d) is all of the above.

Biology & Microbiology

Which structures in the plant connect the cytoplasm of adjacent plant cells?

a. Lignin b. Extracellular matrix c. Cell membrane d. Cell wall e. Plasmodesmata

Biology & Microbiology