Gregor mendel, an austrian monk, is often known as the father of genetics. he studied the cross breeding of the traits in pea plants. which statement best defines genetics (heredity)?
a. passage of genetic introductions from one generation to the next generation.
b. chromosomes that are found inside the chloroplast contain genetic material.
c. the percentage of genes that are expressed.
d. the ability to choose specific traits that are passed from parent to offspring.

Mario performed an experiment to determine if photosynthesis was affected by the amount of light that a plant received. what could he have done to increase the validity of his data? reduce the number of plants. remove the 1 hour group. add a 0 hours control. measure the oxygen in liters

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

9. the history of life on earth is recorded in