Fill in the blanks -
these words may be used once, more than once or not at all: antivirals, antigens, antibodies, toxins, white blood cells

produce to destroy disease-causing microorganisms that enter the body. the disease-causing microorganisms have protein markers called on their surface which are detected by antibodies produced by the body and this the body recognise foreign material.

the correct answer is - ability to find a mate

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands