Look at the punnett square obtained by the monohybrid cross between two rabbits.  r r r rr rr r rr rr here,  r  represents the allele for black hair and    r  represents the allele for white hair. both rabbits crossed had genotype  rr.    what will be the phenotypic ratio for the observable monohybrid crosses?   a.    1: 1: 1: 1  b.    2: 2  c.    2: 1: 1  d.    3: 1

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.

Monarch butterflies have brightly colored orange wings with black patterns on them, making them easily visible to birds that eat butterflies and moths, yet birds rarely eat the monarchs. likewise, the monarch caterpillars are brightly striped yellow and white and black, and they also are rarely eaten by birds, although some wasps will attack them and feed them to their young. what can be inferred from these observations? monarchs must threaten and attack birds, but not wasps. monarchs have a way of discouraging bird predation that does not involve hiding. monarchs’ wings are so colorful that most birds must find them difficult to eat. monarchs lay more eggs than other less conspicuous butterflies.