Which of the following is true of all animals?
1.All animals exhibit bilateral symmetry.
2.All animals are multicellular and heterotrophic.
3.Protostomes have a coelom but deuterostomes have a pseudocoel.
4.Animals most likely evolved from cyanobacteria.
2
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Which population has a small percentage of Denisovan genes, thus suggesting interbreeding?
a. Asians b. Melanesians c. H. floresiensis d. Neanderthals e. chimpanzees
Which structure is the major site of antibody production and a disposal site for old red blood cells?
a. Thymus b. Spleen c. Lymph vessels d. Tonsils e. Bone marrow
How do saltwater crocodiles communicate with each other?
a. Chemical signals in the environment b. Changing colors c. Posturing and stances d. Calls and barks
A set of three consecutive bases in mRNA is known as a(n) ____
a. doublet b. codon c. anti-codon d. codex e. tri-codon