Which of the following most closely represents the male gametophyte of seed-bearing plants? 

#Question id: 168

#Unit 1. Molecules and their Interaction Relevant to Biology

 The peptide alanylglutamylglycylalanylleucine has:

#Question id: 3418

#Unit 11. Evolution and Behavior

Which of the best explanation of directional natural selection occur by change in environmental condition?

A. Increase in the frequency of dark-colored mutants in polluted areas, became known as industrial melanism

B. Numerous insect pests become resistant to insecticides and numerous bacteria become resistant to antibiotics.

C. A plant that is too short may not be able to compete with other plants for sunlight. However, extremely tall plants may be more susceptible to wind damage

D- Beetles move into a new environment with patches of light-green moss and dark-green shrubs, both light and dark beetles might be better hidden (and survive better) than medium-green beetles

#Question id: 10925

#Unit 7. System Physiology – Animal

During the second trimester of pregnancy, where is the predominant site of red blood cell production?

#Question id: 11737

#Unit 6. System Physiology – Plant

Cytokinins have been shown to have effects on many physiological and developmental processes, including____

a) Leaf senescence

b) Apical dominance

c) Gametophytic  development

d) Vascular development

e) Breaking of bud dormancy

f) Causing bud dormancy

#Question id: 28084

#Unit 6. System Physiology – Plant