Q: What are invertebrate chordates that retain all four defining chordate traits as adults called? Choices: - vertebrates - sporozoans - tunicates - lancelets A:
lancelets

(Question)
Q: Vascular disorders involve problems with the flow of what? Choices: - mucus - bacteria - saliva - blood A:
(Answer)
blood

Ques: Q: An axe head and a doorstop are types of what simple machine? Choices: - pulley - blade - lever - wedge A:
Ans: wedge

(Q).
Q: What type of particles can a beta particle be? Choices: - diode or positron - cytoplasm or positron - anode or positron - electron or positron A:
(A).
electron or positron

Ques:Q: What must replicate in the cell cycle before meiosis i takes place? Choices: - cell walls - sperm - meiotic fluid - dna A:

Ans:dna

Question: Q: What important aspect of the scientific method is a suggested explanation for an event, which can be tested? Choices: - scientific control - string theory - independent variable - hypothesis A:
Answer:
hypothesis