1.Give reason for your observation of a pupil size in: (a) dim light and (b) pupil size in bright light. (mention should be made of the circular and radial muscles of the iris and the role they play)

7th grade question (easy) look at the diagram of the food web. the arrows mean eaten by. what would happen if the number of snakes went down? answer choices are in the image.

Imagine a rocket launching from earth and travelling to the moon. in which order would the rocket pass through the layers of the atmosphere? thermosphere, mesosphere, stratosphere, troposphere troposphere, mesosphere, stratosphere, troposphere thermosphere, stratosphere, mesosphere, troposphere troposphere, stratosphere, mesosphere, thermosphere

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?