iram608

Jenna found a mushroom growing at school. Which question can a dichotomous key help her answer?

◯ A. Why is this mushroom growing here?

◯ B. Which species of mushroom is this?

◯ C. Why do mushrooms grow after rainfall?

◯ D. Which species of mushroom is the prettiest?

Look at the photo of the leaf. Which terms describe this leaf?

A. Palmate, lobed, and toothed
B. Palmate, compound, and simple
C. Pinnate, whorled, and opposite
D. Parallel, lobed, and toothed 

Which feature is characteristics of rivers?

◯ A. Deep, dark seawater 

◯ B. Freshwater mixed with saltwater

◯ C. A weak or a strong current

◯ D. Absence of water flow

What would have happened if Gregor Mendel met Charles Darwin ? 

What is science ?

Bacillus thuringenesis is used to contro; the

1. bacteria
2. virus
3. insect pest

Light from a 633-nm laser beam is normally incident on a diffraction grating with 4.80 ✕ 105 lines/m.

(a) Determine the spacing between slits in the grating.
 m

(b) Determine the angle to the third-order maximum.
 °