Pedigree charts use shaded symbols to show organisms that have a particular trait, such as a defective gene, being traced in the chart. a breeder wants to make a pedigree chart of male horses to avoid breeding males that have a defective gene. what symbol would the horse breeder use to show a male who is affected by a defective gene?

Sperm pass through the and connect to a short ejaculatory duct. vas deferens prostrates seminiferous tubules none of the above

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass