A community of organisms along with their physical environment constitutes a(n)
What will be an ideal response?
Ecosystem
Biology & Microbiology
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What is part of the body's initial line of defense against pathogens?
A. Phagocytes B. Mucous membranes C. T cells D. Memory T cells E. Cytokines
Biology & Microbiology
Oxygen will form _____ covalent bonds with other atoms
1.1 2.2 3.3 4.4
Biology & Microbiology
A true body cavity completely surrounded by ____ is called a coelom
a. ectoderm
b. mesoderm c. endoderm d. exoderm e. mesoglea
Biology & Microbiology
Which lineage of Echinoderms is made up of about 950 species of sea urchins and sand dollars, which have their ossicles fused into solid tests that restrict flexibility but provide excellent protection?
a. Holothuroidea b. Crinoidea c. Asteroidea d. Echinoidea
Biology & Microbiology