Q: What gas is contributing to the greenhouse effect? Choices: - nitrogen - oxygen - sodium chloride - carbon dioxide A:
carbon dioxide

(Question)
Q: What type of cell contains a nucleus? Choices: - candid cell - endogenous cell - chloroplasts cell - eukaryotic cell A:
(Answer)
eukaryotic cell

Ques: Q: At certain times of year, a stream or river may overflow its banks. what is the area of land that is flooded called? Choices: - inlet - run off - lowland - floodplain A:
Ans: floodplain

(Q).
Q: Cnidarians have a simple digestive system with a single opening surrounded by what type of structures, which are used to capture prey? Choices: - spines - antennae - claws - tentacles A:
(A).
tentacles

Ques:Q: What is the term for the movement of substances due to random thermal molecular motion? Choices: - Transfusion - convection - condensation - diffusion A:

Ans:diffusion

Question: Q: The bending of a wave around the edges of an opening or an obstacle is called this? Choices: - reflection - sputtering - absorption - diffraction A:
Answer:
diffraction