The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that

 A) tropical communities are older.

 B) tropical regions generally have more available water and higher levels of solar radiation.

 C) higher temperatures cause more rapid speciation.

 D) diversity increases as evapotranspiration decreases.

TLS Online TPP Program

#Question id: 23847

#Unit 2. Cellular Organization

Which group of external signals regulated by Smooth muscle cells and non-muscle cells?

TLS Online TPP Program

#Question id: 23848

#Unit 2. Cellular Organization

Smooth muscle contraction is regulated by 

TLS Online TPP Program

#Question id: 23849

#Unit 2. Cellular Organization

Which pathway regulates the contraction of vertebrate smooth muscle? 

TLS Online TPP Program

#Question id: 23850

#Unit 2. Cellular Organization

Match the following class of myosin (Column I)  with their function (Column II)

COLUMN I	COLUMN II
A. Myosin I	i. Organelle transport
B. Myosin II	ii. Contraction
C. Myosin V	iii. Membrane association, endocytosis

TLS Online TPP Program

#Question id: 28686

#Unit 2. Cellular Organization

Which of the following characters involved in Smooth Endoplasmic Reticulum?

a) lacks ribosomes

b) functions in Protein synthesis

c) processing of secreted and membrane proteins

d) functions in fatty acid and phospholipid synthesis

TLS Online TPP Program

#Question id: 28687

#Unit 2. Cellular Organization

Which of the following organelles contain high concentration of Ca2+-binding proteins which facilitates Ca2+ storage?