True or false? The steroid hormone ecdysone is made by insects, crabs and most vertebrates
Indicate whether the statement is true or false
False
Biology & Microbiology
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Which of these is mismatched?
a. oligodendrocytes; make myelin for brain axons b. Schwann cells; make myelin for peripheral axons c. astrocytes; most abundant cells in the brain d. microglia; engulf dead or dying brain tissue e. none of these are mismatched
Biology & Microbiology
All protists
A. are prokaryotes. B. lack a nucleus. C. lack membrane-bounded organelles. D. are eukaryotes. E. are multicellular.
Biology & Microbiology
A basic solution is expected to contain more hydrogen ions than hydroxyl ions
Indicate whether the statement is true or false
Biology & Microbiology
What is the name of the enzyme that fits new complementary DNA nucleotides into the new strand?
A. DNA telomerase B. DNA replicase C. DNA polymerase D. DNA ligase E. DNA helicase
Biology & Microbiology