Which of the following is an autotroph? a. mushroom b. tree c. deer d. wolf select the best answer from the choices provided

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed

Which of th following best describes how genes produce traits in an organism?

Which of the following is the sl unit used to measure temperature a. kilogram b. liter c. meter d. kelvin