The fossil remains of animals with body plans recognizable as arthropods, echinoderms, mollusks, and other bilaterians first appeared during the _____ Period, around _____ million years ago

A. Ediacaran; 575
B. Cambrian; 542
C. Devonian; 420
D. Devonian; 360
E. Permian; 100


B

Biology & Microbiology

You might also like to view...

The process whereby the embryo embeds within the lining of the uterus is called _________________

Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

Structures produced by basidiomycetes that bridge recently divided cells, ensuring that one of each nuclear type is regularly distributed to each daughter cell is called a

a. gametangia b. basidia c. clamp connection d. basidiocarp e. dikaryocarp

Biology & Microbiology

Which of the following diseases is NOT correctly matched to its reservoir?

A) tuberculosis — cattle B) histoplasmosis — soil C) psittacosis — parakeets D) coccidioidomycosis — air E) pneumocystis — humans

Biology & Microbiology

Controversy surrounds the use of zinc-containing nasal sprays as a cold remedy, since they have been associated with anosmia (loss of smell). If true, this is likely due to the sprays damaging which tissue?  

A.  central nervous system B.  osmic nerve C.  peripheral nervous system D.  neuroglial system Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about olfaction? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology