Primary neurulation can be divided into four stages:

1. Elongation and folding of the neural plate

2. Bending of the neural plate

3. Convergence of the neural folds

4. Closure of the neural tube

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#Id: 8926

#Unit 2. Cellular Organization

ATR activated by single-stranded DNA breaks.

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#Id: 7968

#Unit 10. Ecological Principles

  Hydrologic cycle

      

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#Unit 6. System Physiology – Plant

The energy stored in such a gradient, termed the proton-motive force.

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#Unit 6. System Physiology – Plant

Developmental changes by light (photomorphogenesis) transformation from the etiolated to the green state.

a. A decrease in the rate of stem elongation

b. The beginning of apical-hook straightening

c. The initiation of the synthesis of pigments

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#Unit 6. System Physiology – Plant

Laticifers are made of individual cells and can occur either as articulated systems (single cells connected by a small tube) or non-articulated systems (one large syncytial cell).