The systems of the Earth have both internal and external sources of energy. Which of the following are internal sources of Earth's energy?
I. fusion reactions between hydrogen atoms in Earth's core
II. the decay of Earth's radioactive isotopes
III. the gravitational energy from Earth's original formation
IV. heat that is generated when water molecules spontaneously split in Earth's oceans
A.
I and IV only
B.
I, II, and III only
C.
II and IV only
D.
II and III only
Answers: 2
Biology, 21.06.2019 22:00
Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.
Answers: 2
Biology, 22.06.2019 04:30
Donde se encuentra el adn nuclear en un organismo eucariota?
Answers: 2
Biology, 22.06.2019 05:00
Cedric has a low fever and minor aches. yesterday, he went to the doctor for his booster shot and receive the flu shot. which best explains why he has this reaction?
Answers: 2
The systems of the Earth have both internal and external sources of energy. Which of the following a...
History, 01.08.2020 14:01
Mathematics, 01.08.2020 14:01
Chemistry, 01.08.2020 14:01