protist
sieve tubes
No; anaerobic means lacking oxygen.
A zero symbol
Immuno-efficiency? LOL The prefix "immuno" refers to a person's immune system. "Deficiency" means "lacking". The opposite of a lacking immune system would be one that is working exceedingly well.
basically an animal that is lacking a vertical support system in their structural makeup
Zero and decimal point are both missing
Common sense.
A spider is lacking a skeletal system. -------------------------- also note: 'skeletal system' is two words not one!
Parents should have to pay because obviously the parent is lacking on something which makes the child lack and not go to school
lacking form
Of the eight true planets in the Solar System, only Mercury and Venus are lacking natural satellites.