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89 Topic Pages Found in Biology and starting with the letter P
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Open Pachyrhizus erosus
Pachyrhizus erosus

Native to Central America, jicama is now cultivated in every tropical corner of the globe. It is a popular vegetable in Mexico, as well as in

Open Pain

unpleasant or hurtful sensation resulting from stimulation of nerve endings. The stimulus is carried by nerve fibers to the spinal cord and then to

Palade, G. E.

Romanian cell biologist who was awarded a Nobel Prize for Physiology or Medicine in 1974 with Albert Claude and Christian René de Duve for work on the


( păn'krēəs ), glandular organ that secretes digestive enzymes and hormones. In humans, the pancreas is a yellowish organ about 7 in. (17.8 cm) long


Toothless mammal of tropical Africa and Southeast Asia. They are long-tailed and covered with large, overlapping scales, except on the muzzle, sides

Open Papaya

A tropical herb, papaya ( Carica papaya ) resembles a tree in size and shape to such an extent that the novice is apt to misidentify a papaya plant as

Open Papillomaviruses

(HPV), any of a family of more than 60 viruses that cause various growths, including plantar warts and genital warts, a sexually transmitted disease .

Open Paprika

( see also CHILLI PEPPERS , SWEET PEPPERS ) Because paprika, like cayenne, is made from dried American red peppers ( Capsicum annuum and C. frutescens

Open Parasite

plant or animal that at some stage of its existence obtains its nourishment from another living organism called the host. Parasites may or may not


common name for members of the order Psittaciformes, comprising 315 species of colorful birds, pantropical in distribution, including the parakeets .