TWBKHNt0 H9K 2
Fig. 2.1 shows diagrams of four cells that have been placed in different solutions,
K
L
M
N
Fig. 2.1
(a) In the table below, write the letter K, L, M or N next to the description that best matches the
diagram. One has been done for you.
description
letter
an animal cell that has been placed in distilled water
an animal cell that has been placed in a concentrated sugar solution
a plant cell that has been placed in distilled water
a plant cell that has been placed in a concentrated sugar solution
M
[3]
(b) Explain, using the term water potential, what has happened to cell M.

Dr. kaylan is an ecologist who studies bird behavior. she sets up an experiment to test which type of food crows are most likely to eat when given a choice between walnuts, corn, and sunflower seeds. to perform her experiment, dr. kaylan places three food bins in an area frequented by cows. each bin contains one of the three food types. then, she measures how much of each food type is eaten every day for a month and summarizes the results of her experiment in the pie chart below. based on her results, dr. kaylan concludes that crows choose to eat corn more frequently than other food sources because it has a higher nutritional value. what is a reasonable alternate conclusion that can be drawn from dr. kaylan's data

Depending on the organism the number of in a cell may change

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.