Which of the following describes a relationship of parasitism?

A. Oxpecker birds eat parasitic ticks off the backs of zebras.

B. Birds feed off the insects that are stirred up from the grasses as cattle move through.

C. A polar bear catches a seal for dinner.

D. A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems

Which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.which statements about the fluid mosaic structure of a membrane are correct? select the three correct statements.the framework of a membrane is a bilayer of phospholipids with their hydrophilic heads facing the aqueous environment inside and outside of the cell and their hydrophobic tails clustered in the center.because membranes are fluid, membrane proteins and phospholipids can drift about in the membrane.the diverse proteins found in and attached to membranes perform many important functions.the kinky tails of some proteins keep the membrane fluid by preventing the component molecules from packing solidly together.membranes include a mosaic, or mix, of carbohydrates embedded in a phospholipid bilayer.

Can a trait be both polygenic and have multiple alleles? explain why or why not.