In 1995, researcher jeffrey friedman and his colleagues discovered a new hormone, which they named leptin. leptin is secreted by:

Considering the Mendelian traits tall (D) versus dwarf (d) and violet (W) versus white (w), consider the crosses below and determine the genotypes of the parental plants by analyzing the phenotypes of the offspring.

Which is true for both photosynthesis and cellular respiration? They require oxygen as a reactant. They require organelles. They require light energy from the sun. They require cells to use water.

Down syndrome is an example of trisomy. How many chromosomes will each cell of an individual have in Down syndrome? 46 chromosomes 47 chromosomes 45 chromosomes

Which of the following does NOT make movement in animals possible? A. the contraction and relaxation of muscle cells B. the contraction and relaxation of the brain C. the connection of muscles to outer coverings D. the connection of muscles to bones

Why are mushrooms important to the food chain?

The modern classification system is based on A - putting organisms into categories based on where they live. B - putting organisms into categories based on how they reproduce. C - putting organisms into categories based on similar characteristics.

Classify the mutations as somatic or inherited A. Mutations in the KRAS gene in lung cells promote continuous cell growth B. Mutations of the BRAC1 gene in egg cells lead to breast cancer C.

The female determines the sex of mammals. True False

The definition of a hero is a. universally understood. b. determined by personal and cultural factors. c. clearly defined by a set of established traits. d. static and impartial.

Hydrogen ion concentration in vinegar