Which of the following types of plants would not yet have been evolved in the forests that became coal deposits?
A) horsetails
B) lycophytes
C) pine trees
D) tree ferns
E) whisk ferns
Ans: C) pine trees
You might also like to view...
The Great Pacific Garbage Patch is a region of the north central Pacific where a high concentration of confetti-like
plastic particles swirl slowly around an area as large as the state of ____.
a. Alaska b. Idaho c. Rhode Island d. Texas e. Pennsylvania
Energy is defined as
A. heat. B. the capacity to do work. C. change. D. movement.
Scientists develop a chemical that binds to molecules that make quorum sensing possible, rendering those molecules non-functional. If this chemical is incorporated into a mouthwash, how would it affect the community of bacteria that cause dental plaque?
A. Their negative effects would be reduced because they will no longer be able to produce mucilage and stick to teeth. B. Their negative effects would be reduced because they will no longer be able to produce the acid that damages teeth. C. Their negative effects would be increased because it will cause them to produce mucilage, allowing them to stick to teeth. D. Their negative effects would be increased because it will cause them to produce the acid that damages teeth. E. It would have no effect because they will still be able to form a biofilm and secrete the acid that damages teeth.
Organisms in which group are responsible for the phenomenon called "red tide"?
Amoebozoans Rhizarians Dinoflagellates Red algae Brown algae