On the

which system an organism maintain its structure and shape?

a: skin and nervous system

b: skeletal and muscular system

c: endocrine and digestive system

d: muscular and excretory system

Which position represents spring in the southern hemisphere? a) b) c) d)

Identify and describe the three ways that mutations affect organisms.

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)