Development & Ageing — Biology MCQs (Class 12)
Free chapter-wise Biology MCQs with answers for MDCAT, FSc and entry tests.
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#9 The normal development of an organism is due to the presence of both
A) Nucleus and cytoplasm
B) Cytoplasm and golgibodies
C) Nucleus and nucleoplasm
D) Nucleus and mitochondria
#10 The solid ball cells formed due to early cleavages are called
A) Morula
B) Blastula
C) Gastrula
D) Blastocyst
#11 By day 3 or 4 after fertilization, the human embryo consists of about
A) 16 cells
B) 50 cells
C) 100 cells
D) 200 cells
#12 The process by which germinal layers are formed are called
A) Gastrulation
B) Blastulation
C) Cleavage
D) Embryonic induction
#13 The blastocyst is a fluid-filled hollow sphere consisting of trophoblast and
A) Blastomeres
B) Micromeres
C) Megameres
D) Inner cell mass
#14 Neurulation is induced by chemical signals from the
A) Ectoderm
B) Notochord
C) Blastocyst
D) Endoderm
#15 In Acidian(sea squirts), muscle cells develop from
A) Clear cytoplasm
B) Grey vegetal cytoplasm
C) Grey equatorial cytoplasm
D) Yellow cytoplasm
#16 Implantation of embrryo takes place in the
A) 1st week of pregnancy
B) 2nd week of pregnancy
C) 4th week of pregnancy
D) 8th week of pregnancy
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