39. A teacher prepares agar for six petri dishes on which to grow E. coli bacteria. The table shows the contents of the agar in each petri dish.
Contents of Agar
Beef Broth Chicken
Broth
Saline
Group
Petri Dish
Condensed
Milk
Х
1
Yes
Yes
No
No
X
2
No
Yes
No
No
Y
3
Yes
Yes
Yes
No
4
Y
No
Yes
No
Yes
z
5
Yes
Yes
Yes
No
Z
6
No
Yes
No
Yes
Based on the information in the table, which of the following questions is the
experiment designed to test?
A. Can different bacteria live on agar containing proteins?
B. Will agar containing salt prevent bacteria from growing?
C. What type of agar is best for growing E. coli?
D. Does E. coli grow at different rates?

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

The pattern of this wave changes between its beginning and end. what is true about the amplitude and wavelength of the wave when the pattern changes?

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.