The reason for a "blind spot" in the visual field is that select one: a. the lens cannot focus all of the visual field onto the retina. b. there are no photoreceptors in the retina where the axons exit the eye. c. blood vessels collect together and enter the eye at the blind spot. d. retinal cells die with age and overuse, resulting in blind spots. e. rods are less sensitive to light than are cones.

How are the tortoises that darwin observed on the galápagos islands similar to the anoles that losos studied

Indica el nombre y la fucion de los vasos sanguineos que entran y salen de los riñones

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat