Answer:
DNA helicase separates the two strands of DNA at a replication fork.
Explanation:
To allow DNA replication, two DNA strands should be separated to serve as a template strand. DNA helicases are the enzymes that separate the two parental DNA strands in an energy-dependent way. DNA helicases move along the DNA and separate the two strands by breaking the hydrogen bonds between the complementary base pairs of two DNA strands. The energy released from ATP hydrolysis is used to break the hydrogen bonds.
Answer:
The correct answer would be C, abdominal.
Explanation:
This is true because the pelvic cavity is protected by the pelvis, the cranial cavity is protected by the skull, the spinal cavity is protected by the skull as well as the vertebral column, and the thoracic cavity is protected by the rib cage. Leaving the abdomen the only body cavity not being protected by some sort of bone.
I hope this helps! :)
Getting and using energy Reproducing and Maintaining structure
