Scientists have studied patterns of development and differentiation of cells and
tissues in a wide variety of species. Which statement describes the role and
function of master control genes, or Hox genes, in many species?
a. They often are identical and perform identical functions in different species.
b. They are unique and perform different functions in different species.
c. They exist and function only in humans and a few other species.
d. They exist and function only in insects and a few other species.
Answers: 3
Biology, 22.06.2019 02:00, rhodesnyla01
The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.
Answers: 1
Biology, 22.06.2019 10:00, nyasiasaunders1234
Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins
Answers: 2
Biology, 22.06.2019 10:50, luisannavasquez6129
Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%
Answers: 2
Scientists have studied patterns of development and differentiation of cells and
tissues in a wide...
Health, 24.11.2020 20:30
Spanish, 24.11.2020 20:30
Mathematics, 24.11.2020 20:30
Chemistry, 24.11.2020 20:30