Which star has the greatest luminosity? A)
Barnard's star

B)
Procyon

C)
Alpha Centauri

D)
Rigel

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.