The answer to number 4 is D
Answer:
The superior vena cava is formed by the merging of the right and left brachiocephalic veins.
Explanation:
The superior vena cava is one of the main veins of the human body, it is responsible for receiving blood from the head, neck, upper chest and upper limbs. It is formed by the union of the right and left brachiocephalic veins, they originate from the junction of the subclavian vein with the internal jugular vein to form the right and left brachiocephalic venous trunk, both trunks join or merge into a single trunk and they form the superior vena cava, which flows into the upper part of the right atrium.
Answer:
The correct answer will be option A-the accepted model of the atom was changed.
Explanation:
J.J Thomson discovered the electrons by cathode ray tube experiment in 1897 and realized that the accepted model of atom as proposed by the Dalton has problems as he stated that "atom is indivisible".
The discovery of sub-atomic particles-electrons in his experiments showed that the atom can be divided into sub-atomic particles and he proposed the pudding model of the atom which changed the accepted model of atom at that time.
Thus, option A-the accepted model of the atom was changed is the correct answer.
Answer:
C) Bacteria because it contains bacteria that do not live in extreme conditions.
Explanation:
Bacteria in domain Bacteria live in the soil, water, bodies of humans and animals, but not extreme environments.
