Trace elements are not important elements for living organisms
Indicate whether the statement is true or false
F
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Which cells alert the adaptive immune system when they detect antigens?
a. eosinophils b. B and T cells c. macrophages d. dendritic cells e. cytokines
Which of the following is a difference between a viroid and a virus?
A. Viroids are alive and viruses are not. B. Viroids are composed solely of nucleic acid while viruses are composed of nucleic acid surrounded by a protein coat. C. Viroids are not infectious particles and viruses often cause disease. D. Viroids infect only plants while viruses infect only animals and prokaryotes. E. Viroids contain some genes important for their own replication while viruses rely entirely on host cell enzymes for their replication.
The electrons for photosynthesis come from:a
ATP. b. glucose. c. NADP+. d. chlorophyll a. e. H2O
The set of phenotypes expressed by a single genotype across a range of environmental conditions is referred as the norm of ________
Fill in the blank(s) with correct word