The contractile vacuole is an organelle found in paramecia, a group of unicellular organisms. contractile vacuole pump out fresh water that accumulates in the organisms by osmosis. explain how this is an example of the way paramecia maintain homeostasis?

Coat color in cats is determined by genes at several different loci. at one locus on the x chromosome, one allele (x ) encodes black fur and another allele (xo) encodes orange fur. females can be black (x x ), orange (xoxo), or a mixture of orange and black called tortoiseshell (x xo). males are either black (x y) or orange (xoy). bill has a female tortoiseshell cat named patches. one night, patches escapes from bill\'s house, spends the night out, and mates with a stray male. patches later gives birth to the following kittens: one orange male, one black male, two tortoiseshell females, and one orange female. what are the genotypes of patches, the stray male, and the kittens?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?