Match the columns and choose the correct option.

Column I	Column II
A.    Progress zone	i.                    thickening of the ectoderm at the apex of the developing limb bud
B.     Apical ectodermal ridge	ii.                  The cells found within the most posterior region
C.     Zone of polarizing activity	iii.                The highly proliferative mesenchyme that fuels limb bud growth

#Question id: 2989

#Unit 2. Cellular Organization

Use the figure to answer the question below.

In the figure, G1 is represented by which numbered part(s) of the cycle?

#Question id: 2529

#Unit 2. Cellular Organization

Cell walls commonly are classified into two major types. This classification is based not on structural or biochemical differences;

A) primary walls and

B) secondary walls

i) walls formed during cell growth

ii) walls that are formed after cell enlargement stops

iii) multilayered walls that are strengthened and waterproofed by lignin

iv) Usually they are thin and simple, but some times may be thick and multilayered, such as those found in collenchyma or in the epidermis

v) highly specialized in structure and composition, reflecting the differentiated state of the cell

Which of the following is the correctly represents features of primary and secondary walls?

#Question id: 21961

#Unit 2. Cellular Organization

#Question id: 28749

#Unit 2. Cellular Organization

Sugars provide quick energy for seed germination by converting fats into sugar molecules is accomplished by a series of reactions this conversion is present in___

#Question id: 19101

#Unit 4. Cell Communication and Cell Signaling