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Vertebrates are animals that have __________.
a backbone (vertebral column)
The backbone protects the __________.
spinal cord
Mammals are __________ vertebrates with 4 limbs.
homeothermic
The two major classifications of flowering plants are __________ and __________.
dicotyledons and monocotyledons
Fungi reproduce by releasing microscopic single cell __________.
spores
The __________ is a loop of chromosome controlling all cellular activities of the bacterial cell.
nucleoid
A virus consists of a central core of __________ or __________.
RNA or DNA
Pathogenic bacteria produce poisonous waste products called __________.
toxins
Protoctista are often referred to as the __________ kingdom because they are a mixed group of organisms.
dustbin
Most protozoans propel themselves by structures called __________ or __________.
cilia or flagella