Which of the following statements regarding microbial changes in a developing fetus are true?
a. the uterus and its contents (baby and placenta) are sterile until vaginal delivery.
b. microbes that promote the digestion of milk may be transferred to the baby through the placenta
c. microbes that promote healthy skin in a newborn are transferred to the baby as it passes through the vagina
d. microbes that promote the digestion of milk may be transferred to the baby as it passes through the vagina
c. microbes that promote healthy skin in a newborn are transferred to the baby as it passes through the vagina
d. microbes that promote the digestion of milk may be transferred to the baby as it passes through the vagina
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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.
Certain groups of cells move inward from the surface of the blastula in a carefully orchestrated migration called
A. blastulation B. archenteron formation C. morula formation D. gastrulation E. cleavage
Which of these is an advantage shared by early plants that invaded land?
A) Fewer predators B) Increased sunlight availability C) Increased support against gravity D) A and B E) All of the above
Genetic disease caused by a defect in the CFTR gene, which is responsible for the formation of a transmembrane chloride ion transporter; causes the mucus of the body to be viscous.
What will be an ideal response?