What is the role of the corpus luteum during early pregnancy?
A-The corpus luteum nourishes the rapidly growing embryo.
B-The corpus luteum protects the fertilized egg during its transport to the uterus.
C-It produces the hormones that will support the early pregnancy.
D-The fertilized egg will implant in the corpus luteum.
Answer: C- It produces the hormones that will support the early pregnancy.
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Which of the following is true of purines?
A) Cytosine is a purine. B) Adenine's bonding to thymine is stronger than is guanine's to cytosine. C) Purines have a double-ringed structure. D) Both adenine and thymine are purines. E) Purines bind readily to deoxyribose but not to ribose.
Describe the roles of the following enzymes during DNA replication: ligase, single-stranded binding proteins (SSBs),
DNA polymerase III, primase, DNA helicase.
What will be an ideal response?In simple diffusion substances will move from an area of high concentration to an area of low concentration
1.True 2.False
Hemophilia is a genetic disease that has plagued the royal houses of Europe. The disease allele is recessive and X-linked. Queen Victoria was a carrier, and her granddaughter Alexandra married Nicholas II, the last czar of imperial Russia
Alexandra was a carrier for hemophilia; Nicholas was normal. Their son, Alexis, was afflicted with the disease. Alexis and his four sisters were killed in 1917. What genetic traits were possible for the four sisters? A) None of the four sisters carried the hemophilia allele. B) At least one of the sisters was a carrier of the allele. C) All four sisters were carriers of the hemophilia allele. D) At least one of the sisters had hemophilia like Alexis.