Choose the connective that belongs in the blank in the following sentence.
i like to play baseball. i can't throw a ball very well.
a. however
b. for instance
c. besides
d. in fact

Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.

Classify the structures as homologous or analogous, depending on their structure and function.

When analyzing tree rings, what do scientists assume a thin ring indicates?