The early embryo (before 5 weeks of age) gets nourished by
a. absorbing nutrients for the bloodstream of the mother (the bloodstream of the embryo mixes with the bloodstream of the mother).
b. breaking down the lining of the uterus.
c. transferring of nutrients from the placenta.
d. none of these.

Which of the following statements describes the lysogenic cycle of lambda (λ) phage? a) after infection, the viral genes immediately turn the host cell into a lambda-producing factory, and the host cell then lyses.b) most of the prophage genes are activated by the product of a particular prophage gene.c) the phage genome replicates along with the host genome.d) the phage dna is copied and exits the cell as a phage.