Gastrulation is the process by which an embryo becomes three-layered. Indicate whether the statement is true or false
True
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Which functional group is polar and a key component of alcohols?
a. carbonyl b. hydroxyl c. phosphate d. amino e. carboxyl
Which type of microscopy enhances and amplifies slight changes in the phase of transmitted light?
A) differential interference contrast microscopy B) digital video microscopy C) fluorescence microscopy D) phase-contrast microscopy E) both differential interference contrast microscopy and phase-contrast microscopy
Which animal has an endoskeleton made entirely of cartilage and reinforced with cartilage?
A) bullfrog B) mackerel C) shark D) robin
Normally, fertilization occurs in the ________, and implantation occurs in the ________
A) oviduct (fallopian tube); uterus B) vagina; uterus C) ovary; oviduct (fallopian tube) D) uterus; ovary