The diagram shows a bird that lives near rivers, Use the key to identify the bird shown in the diagram
1
go to 2
2
toes joined by a flap of skin
toes separate
A heron
beak as long or longer than the head go to 3
beak not as long as the head
B little grebe
top of head black
C avocet
top of head white
D mute swan​

Contrast how pollination is different among gymnosperms and angiosperms.

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

What are the student's observations and inferences before he starts his investigation?