Biology Test Questions Developmental Biology DAT

Which hormone sees a significant increase immediately during ovulation?
C. Estrogen
D. Progesterone
E. hCG
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Terms in this set (12)
What is the correct order of stages in pre-embryonic development?
A. Cleavage, zygote, blastocyst, morula, implantation
B. Cleavage, zygote, morula, blastocyst, implantation
C. Zygote, cleavage, morula, blastocyst, implantation
D. Zygote, cleavage, blastocyst, morula, implantation
E. Zygote, morula, blastocyst, implantation, cleavage
A breeder attempts to cross an alpaca with a llama for thicker wool and finds that the hybrid offspring can rarely live for more than a few days. Which of the following best describes what this outcome probably resulted from?
A. Prezygotic reproductive isolation
B. Postzygotic reproductive isolation
C. Polyploidy
D. Mechanical isolation
E. Sympatric speciation
Which of the following statements best describes the process of gametogenesis?
A. Primary spermatocytes undergo prophase I of meiosis in the ovary and complete meiosis in adults after puberty
B. Primary spermatocytes complete meiosis to form 4 sperm while still in the ovary
C. Primary oocytes undergo prophase I of meiosis in the ovary and complete meiosis I in adults after puberty
D. Primary oocytes complete meiosis to form 4 eggs while still in the ovary
E. Both Oogenesis and Spermatogenesis produce 4 gametes upon the completion of meiosis
In organisms such as birds and reptiles, the yolk sac contains nourishing yolk. However, in humans the yolk sac serves a different purpose. Which of the following is its purpose in humans?
A. Food storage site for embryo
B. First site of red blood cell synthesis
C. Site to excrete wastes
D. Site for white blood cell synthesis
E. Oxygen transport
Which embryonic layer forms the notochord? A. Endoderm B. Mesoderm C. Ectoderm D. Blastocoel E. ArchenteronB. MesodermDuring embryonic development, what develops directly above the notochord? A. Spinal ganglion B. Mesoderm C. White matter D. Spinal cord E. Neural tubeE. Neural tube