Which organelles are believed to have originated from free-standing bacteria ingested by ancient eukaryotic cells?
A) chloroplasts and ribosomes
B) mitochondria and chloroplasts
C) lysosomes and ribosomes
D) mitochondria and Golgi complex
E) chloroplasts and lysosomes
Answer: B
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Why are tomatoes, squash, and beans considered fruits?
A. They contain seeds from a flowering plant. B. They are produced by a flowering plant. C. They develop from the reproductive structures of the flowers. D. They protect, provide nutrients for, and help distribute embryonic plants. E. All of the answer choices are correct.
what is wheal and flare?
What will be an ideal response?
Porpoises and some bats find their prey using sound waves in the _________range.
A. supersonic B. infrasonic C. ultrasonic D. high-pitched, human ear-audible E. low-pitched, human ear-audible
What are NOD proteins?
A) cytoplasmic receptors of microbial molecules B) cellular signals triggering inflammation C) receptors of microbial molecules in phagocyte cell membranes D) activators of complement E) chemotactic factors