Marie and Pierre Curie successfully isolate radioactive radium salts from the mineral pitchblende in their laboratory
interphase, telophase, and cytokinesis
Only phylum bryozoans were not present during Cambrian period. It is an extensive fossil that did not appear in Cambrian nor pre-cambrian rocks. Bryozoans are found in the early Ordovician period. It could have probably existed during the Cambrian period but were soft-bodied or not preserved.
28. A scientific theory explains an aspect of the natural world and can be tested repeatedly using the scientific method or experiments. This means that the explanations or content of a scientific theory is based on evidence gained through observation or experimentation.
The answer is True.
29. Scientific law is a statement that describes a a phenomenon that has been observed in repeated experiments. These statements are verified through the scientific method. Laws do not change; rather, they are applied to expand or broaden certain aspects.
30. Experiments are done to support, refute or validate existing theories. They show cause and effect insight through demonstration. These theories then may bring about laws in the scientific field.
The answer is then True.
31. I would get the Refrigerator A. The cost of running Refrigerator A is $10.00 a month, while B is $15.00 a month. This means the energy consumption is less with refrigerator A. Although B is cheaper, the energy consumption is much higher. In the long run, refrigerator A, would be a better investment.
32. Patterns of stars in the sky are called constellations. Constellations are a group of stars that form a recognizable pattern that is traditionally named after the mythological figure or whatever thing, animal or person that resembles the pattern.
The answer is B.
33. Ancient Greeks and Romans believed that the patterns in the sky represented mythological characters and animals. Examples of such would be Aries, Cancer, Capricornus, and the Big dipper. Romans mythology also depicts other celestial bodies as their gods, like mercury after the messenger god; Venus, the goddes of love and beauty.
The answer is C.
34. The sun in the solar system is a star. In fact, a star is considered or is called a sun if it is the center of a planetary system. Our own sun is the largest object that you can find in our solar system.
The answer is B.
35. The sun, is the closest star to Earth specifically. It is about 93 million miles away. It is brighter than the other stars because of its closeness. It makes up 99.8% of the total mass of our solar system.
The answer is B.
36. Light from the sun travels at the speed of light. It takes 8 minutes and 20 seconds for it to travel from the sun to the surface of the Earth at an average. It varies at times because the orbit of the Earth is elliptical.
The answer is A.
In hypertonic condition, osmosis will occur. In this case, the fluid will be attracted into the hypertonic solution since it osmotic pressure is higher. This condition can cause the nearby cells losing their water molecule and become shrink.
If it happens for a long time, the concentration of molecule inside the cell will increase since the water is decreased. This will cause the cell undergo lysis.
