In some cases the blastomere can produce complete embryo the cleavage will be___________?
A. Spiral and determinate
B. Radial and indeterminate
C. Spiral and indeterminate
D. Radial and determinate
Humans usually have 20 primary (deciduous, “baby” or “milk”) teeth and 32 permanent (adult) teeth. Most people know these teeth as baby teeth, though they are also sometimes called milk teeth or primary teeth. In all, children have 20 baby teeth – 10 on the top and 10 on the bottom. These teeth act as placeholders for the adult teeth that grow in after the baby teeth fall out.
A. Acrocentric
B. Telocentric
C. Submetacentric
D. Acentric
The common waste material in bacteria is____________?
A. Glycogen
B. Lactic acid
C. Ammonia
D. Urea
A. Ligase
B. Endonuclease
C. Exonuclease
D. Gyrase
All of the following are elements that plants need in very small amounts except___________?
A. Iron
B. Hydrogen
C. Chlorine
D. Copper
Double fertilization occurs in_________?
A. All plants
B. All seed plants
C. Gymnosperms
D. Angiosperms