In which step of the scientific method would you need controls?

a. observation

b. hypothesis

c. experimentation

d. conclusion

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3: 1. if the allele are designated (r & r) receptively. what is the probable genotypes of the round seeds which produced f 1 ? rr & rr rr only rr & rr rr only rr only

Which is a function performed by stem cells in the skin a. replacing lost skin cells b. making cells for the intestines c. growing new organs d. differentiating into brain cells plz apex