The earliest cells were probably autotrophs that made food by photosynthesis
a. true
b. false
Answer: b. false
Biology & Microbiology
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Most invasive species have a far greater impact in their new home than they did in the community in which they evolved. Why is this?
What will be an ideal response?
Biology & Microbiology
The sieve plate, stone canal, circular canal, and radial canals of a sea star are structures of the
a. nervous system. b. water-vascular system. c. digestive system. d. excretory system.
Biology & Microbiology
Identify the structure that does NOT have a double membrane protecting it.
A) nucleus B) chloroplast C) mitochondria D) ribosome
Biology & Microbiology
Excitatory neurotransmitters are most like what part of an automobile?
A) brakes B) windshield wiper C) accelerator D) horn
Biology & Microbiology