Answer: One of the ways that people of ancient times classified plants and animals is by use. Today, group the creatures, as they do the plants, on the premise of shared physical attributes. They put them in a progressive system of groupings, starting with the kingdom Animalia and continuing through phyla, classes, orders, families, genera and species.
Explanation:
Answer:
Correct option is (B). Nyctalopia affects vision in the fovea centralis, resulting in impaired vision.
Explanation:
Nyctalopia which is also known as night blindness, in this condition it's difficult to see in relatively low light. It can cause by two types one is from birth, and another is injury or vitamin A deficiency which is also called as malnutrition.
It is caused by the loss of normal rod function in retina, and loss their ability to response in the light. The outer part of retina is made up of more rods compare to cones, loss of peripheral area repeatedly results in night blindness.
As baleen whale number increase in the antarctic the seal population decreases.These is because baleen whale is predictor to seal while sea is the prey. An increase in number of baleen whale led to decrease of number of seal since more seal will be required to feed the baleen whale.
Answer:
Hormones act only on cells not structures.
Explanation:
Hormones act only on cells and they do not act on other structures because there are specific cells have receptors for that particular hormone. Some hormones bind itself to the receptors on the surface of target cells whereas other hormones enter the cells and bind itself to the receptors present in the cytoplasm or nucleus of the cell.
