Ch. 11 Botany

An irreversible increase in mass 

• growth 
• differentiation
• meristem
• development

Genes, with the environment, control

• growth
• development
• differentiation
• all of these

External environmental factors controlling growth and development include

• light
• water availability
• minerals
• all of these

A precursor is 

• a simple molecule that becomes more complex
• an electron
• a gene that makes a hormone
• a proton

Auxins help plants grow by

• making cells longer
• making meristems more active
• making plants flower
• slowing root growth

The most important effects of cytokinins

• cell division
• opening stomata
• cell elongation
• flowering

Abscisic acid primarily does this

• maintain turgor pressure
• maintain dormancy in seeds
• Makes leaves fall
• cell division

Suppressing growth of lateral buds is called

• branch inhibition
• mitosis slowing
• apical dominance
• auxin regulated growth

ripening fruit releases this gas

• cytokinin
• giberellic acid
• ethylene
• auxin

Organelles that may perceive gravity in root caps.

• leucocytes
• taxes
• amyloplasts
• chloroplasts