Global Positioning System (GPS)
Answer:
D) An original parent DNA strand and one newly synthesized DNA strand comprising a new DNA molecule.
Explanation:
- Semi-conservative replication refers to two strands of DNA unzip, and a new strand is assembled onto each 'conserved' strand.
- The replicated double helix consists of one old strand and one newly synthesised strand.
- It describes the structure of DNA, a twisted helix of two strands with bases joining the strands.
Answer:Type I interferons help protect cells from viral infection. The correct option is B.
Explanation:
Type I interferon (IFNα/β) is a type of cytokine that provides one of the first lines of host defense against viral infection.
Type I interferons act in a paracrine manner such that it have numerous effects on the surrounding cells, preparing them to ward off possible infection. The primary function is to induce protection against viruses in neighboring, non-infected cells. In the target cells they cause digestion of viral DNA and viral proteins.
Answer:
heart
Explanation:
His heart rate is increasing while he runs
Answer:
cardiorespiratory endurance?In summary, to improve cardiovascular fitness, a regular aerobic exercise program, repeated 3–5 times per week for 20–60 minutes and at an intensity of 142–186 BPM
Explanation: