The __________________ toolmaking tradition dates from 1.5 million years ago which features the hand axe as one of its most prominent tools.

Which of the following is NOT a hominin genus?

An _____________ is a ridge of bone running horizontally across the back of the skull in apes and some hominins.

H. floresiensis is believed to have evolved from which hominin species?

______________ was a dwarf species of hominin that lived on the Indonesian island of Flores until about 50,000 years ago.

Brain size in early hominins increased dramatically after ______ million years ago.

What more ape-like hominin was Homo habilis believed to be contemporaneous with?

One phenomenon that is very common across insects (and other arthropods) is that when it comes to mating, females are often the choosier sex. This week’s required reading, lecture, and discussion should have provided some insight into this.  Explain in your own words why, in arthropods generally, evolution has led to females being choosier than males, and why males are generally more willing to mate with multiple females. In your answer, be sure to describe the process of sexual selection (starting from gamete size all the way to selection of mates). Explain your rationale clearly, as if you were explaining this phenomenon to someone with little background in biology.   

In Question 2, you will expand on your response from Question 1 using a real life example: Male peacock spiders are famous for their extravagant coloration and complex displays. Using what you learned from this week’s required reading and lectures, what might be the function of these male displays? During interactions between females and males, what might females be doing to maximize fitness and what might males be doing to maximize fitness?  Photo credit: Shane Walker

Please give the crystal structures for the figures given below. Fig. 1 is [ans1] , Fig. 2  is [ans2].  Fig. 3 is  [ans3], and Fig. 4 is [ans4].  The black and white dots represent two different kinds of atoms, respectively.   (If you cannot see the figures, please see the pdf file attached.)     Fig. 1 Fig. 2  Fig. 3 Fig. 4