Question 1
Claire, a psychologist, observes a group of 9 year olds and a group of 13 year olds during recess at school in order to assess changes in playgroup preferences of boys and girls between these two ages. Claire's study uses a ________ design.
◦ cross-sectional
◦ longitudinal
◦ cross-sequential
◦ cross-longitudinal
Question 2
Dominique has inherited the disease sickle-cell anemia. What might that indicate about Dominique's parents?
◦ At least one of her parents has a recessive gene for sickle-cell anemia.
◦ Both of her parents have a recessive gene for sickle-cell anemia.
◦ Only one of her parents has a dominant gene for sickle-cell anemia.
◦ Both of her parents have a dominant gene for sickle-cell anemia.
General structure of a plant cell
thy cell
Eukaryotic Cell
cell component
![Chickenpox rash. (Centers for Disease Control and Prevention [CDC]/Ann Cain)](https://biology-forums.com/gallery/30/medium_548020_08_06_17_10_52_37_306981954.jpeg)
Chickenpox rash. (Centers for Disease Control and Prevention [CDC]/Ann Cain)