Which one of the following statements concerning weight and energy balance is most accurate?
a. people generally need the same amount of physical activity to maintain weight stability.
b. regular physical activity doesn’t impact the percentage of body fat in children and adolescents.
c. it’s possible to achieve weight stability by doing the equivalent of 60–120 minutes a week of moderate-intensity walking.
d. the optimal amount of physical activity needed to maintain weight is unclear.

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

Match each nutrition monitoring survey to its description. csfii nfcs nhanes what we eat in america

Some viruses can be crystallized and their structures analyzed. one such virus is yellow mottle virus, which infects beans. this virus has a single-stranded rna genome containing about 6300 nucleotides. its capsid is 25-30 nm in diameter and contains 180 identical capsomeres.if the yellow mottle virus begins its infection of a cell by using its genome as mrna, which of the following would you expect to be able to measure? a) replication rateb) transcription ratec) translation rated) formation of new transcription factors