What type of bond joins neighboring water molecules
Ans: Hydrogen
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What can be said about animal and vegetal poles?
A. When animal pole cells are cultured with vegetal pole cells, some of the animal pole cells become mesoderm. B. When animal pole cells are cultured with vegetal pole cells, some of the vegetal pole cells become mesoderm. C. Isolated animal cells develop as endoderm. D. Isolated vegetal cells develop as ectoderm.
Sexual reproduction requires the fertilization of an egg by a sperm.
a. true b. false
Which of the following is a structure adapted for seed dispersal by animals?
a. light, feathery plumes b. thick, indigestible seed coats c. air spaces and cork d. turgor pressure within fruits e. winged fruits
The sinoatrial node controls the heartbeat.
Answer the following statement true (T) or false (F)