Author: Anonymous

A population of birds, with various size beaks, eats seeds. Small seeds can be eaten by birds with small beaks. Larger, thicker seeds can only be eaten by birds with larger, thicker beaks. There is a shortage of small seeds but that there are still many large seeds. Natural selection will change the population of birds such that birds with larger beaks will survive and produce off springs and birds will small beaks will not be able to survive. What type of natural selection is described here?

Which one of the following is not an example of a photoautotroph?

A person with a malformed epiglottis will have trouble _____.

Herbivorous animals can obtain more nutrients from plants than can carnivorous animals because _____.

If two finches belong to the same species, then they

Identify the element with the largest band gap.

Which of the following substances should have the highest melting point?

Calculate the freezing point of a solution of 300.0 g of ethylene glycol (C2H6O2) dissolved in 300.0 g of water. Kf = 1.86°C/m and Kb = 0.512°C/m.

A metal crystallizes in a face centered cubic structure and has a density of 11.9 g/cm3. If the radius of the metal atom is 138 pm, what is the identity of the metal?

Calculate the mass of oxygen (in mg) dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air. Assume the mole fraction of oxygen in air to be 0.21 and the Henry’s law constant for oxygen in water at this temperature to be 1.3 × 10-3 M/atm.