Early-onset alzheimer’s disease affects people under the age of 65. less than five percent of people who are diagnosed with alzheimer’s disease have this type. many cases of early-onset alzheimer’s disease are inherited, a type known as familial alzheimer’s disease (fad). which statement is best supported by this information?
f) fad is the result of a genetic change in one or more chromosomes.
g) natural selection will continue to reduce the incidence of fad.
h) fad affects only the genes of middle-aged people.
j) deletion of one amino acid causes fad.

Which group of chordates does  notpossess true backbones?                 a.  birds      b.  frogs and toads      c.  lampreys      d.  crocodilians

Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?

What are tissues? a groups of tissues that work together b basic units of structure and function c groups of cells that perform the same function d multiple organs that perform a major function