If scraping oneself on a contaminated object may cause an invasion of the body by bacteria, then scraping oneself on an object that is what, may cause an invasion of the body by bacteria? Answer choices: - unknown - safe - threatened - harmful substances - Pollution - foreign - barrel-shaped - contaminated
contaminated

(Question)
If androgens are chemical messengers, then androgens and what kind of messengers? Answer choices: - animals - interact - organ - humans - chemical - PDAs - allow growth - kinetic
(Answer)
chemical

Ques: If ecology studies something that decreases when an animal species is harmed, then ecology studies something that decreases when an animal species is what? Answer choices: - omnivores - harmed - deadly - dead - haploid - negative - dormant - inactive
Ans: harmed

(Q).
If A life involving travel is a type of movement that changes population size, then alife involving travel is a type of movement that changes what? Answer choices: - Continents drifting - the environment - Animal survival - important habitats - major threat to health - population size - an organism's body - Something to move
(A).
population size

Ques:If storms cause the amount that lakes contain to increase, then what cause the amount that lakes contain to increase? Answer choices: - nutrients - icebergs - bacteria - storms - lily pads - excretion - flooding - droughts

Ans:storms

If insects have a nervous system, then what do insects have? Answer choices: - four limbs - liver - sensory neurons - epidermis and dermis - lizards - spiders - important habitats - nervous system
nervous system