The molecule of water is different from the molecules of oxygen and hydrogen in the following ways:
1. Combustion: Oxygen supports combustion, hydrogen burns in the air to form water. Water is not combustible. It rather inhibits combustion when poured over burning substances.
2. State of matter: Water is a liquid in room temperature whereas oxygen and hydrogen are gases. The polar nature of water contributes to hydrogen bonding between the hydrogen and oxygen atoms of water.
3. Density: Water is denser than both oxygen and hydrogen. Hydrogen bonding helps pack more molecules of water in less space.
4. Freezing point: Water freezes to ice at 0°C whereas oxygen freezes at -218°C and hydrogen freezes at -259°C.
The most common form of cell division is called mitosis. It is used for growth and repair. During mitosis, a cell makes an exact copy of itself and splits into two new cells.
Mitosis is closely controlled by the genes inside every cell. Sometimes this control can go wrong. If that happens in just a single cell, it can replicate itself to make new cells that are also out of control. These are cancer cells.
Answer:
D. 3; 508
Explanation:
A population compromises of the number of organisms of same species which can interbreed living in a particular geographical area. These members can interbreed to reproduce fertile offspring. A population can occur both in small and large areas.
Here, Linda observed three different populations: porcupines, pinion pines and beetles. The total organisms in her study comes from adding all the organisms from the three different populations. Thus, total organisms she studied is:
25 + 151 + 332 = 508.
Hence, Linda's study encompasses 3 populations and 508 organisms.
Answer:
Protons, neutrons, and electrons.
Explanation:
The correct complementary RNA strand would be answer B!
