Is the energy pyramid a true representation of all elements in an ecosystem? Explain your answer. HELP I NEED THIS ASAP please help

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.

Which environmental change would most likely result in bullfrog offspring that are able to store more water than bullfrogs in previous generations?

Select the correct answer. what does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms