Q: Echinoderms lack what type of system that in humans consists of the brain and spinal cord? Choices: - autonomic system - endocrine system - peripheral nervous system - centralized nervous system A:
centralized nervous system

(Question)
Q: Covalent solids are formed by networks or chains of atoms or molecules held together by what? Choices: - ionic bonds - bail bonds - gravitational bonds - covalent bonds A:
(Answer)
covalent bonds

Ques: Q: Someone who believes something despite the evidence is referred to by what term that references a false belief about our planet? Choices: - geocentric-earther - conspiracy theorist - solid - earther - flat-earther A:
Ans: flat-earther

(Q).
Q: The pressurized gas of earth's atmosphere is contained by what force? Choices: - variation - light - plasma - gravity A:
(A).
gravity

Ques:Q: What function does a vacuole do for a cell? Choices: - division - transfer - reproduction - storage A:

Ans:storage

Ques:Q: The duodenum is the first and the shortest part of what, and is where most chemical digestion takes place? Choices: - rectum - large intestine - stomach - small intestine A:

Ans:
small intestine