If the birth rate in a population is 40, and the death rate in that population is 15, then the population will be experiencing growth. The growth will be 25 on every 1,000 people. If this trend continues for longer period, then the population will start to become younger and younger, making the basis of the population pyramid wider, while the top part of it smaller and smaller. This demographic situation in modern times seems to be present only in the less developed countries, with the majority of the transitioning countries having much decreased population growth, and the more developed countries having more deaths than births, thus being aging populations.
The right answer is hydrophilic.
Phospholipids are amphiphilic lipids which means that one side is hydrophilic (the glycerol phosphate portion) while the other side is hydrophobic (fatty acids). Thus, if placed in water, the phospholipids will be organized in such a way that only the hydrophilic zone will be in contact with the water. If they are forced to mix with this liquid, they will form a lipid bilayer in which the hydrophobic fatty acids face each other. The plasma membranes of cells and organelles are moreover constituted in this way.
At first glance, it may seem that living systems are able to defy the second law of thermodynamics. However, on closer examination it becomes clear that although cells create organization from raw materials in the environment, they also contribute to disorder in the environment by releasing _____________.
(a) water.
(b) radiation.
(c) heat.
(d) proteins.
Answer:
(c) heat.
Explanation:
Cells appear not to follow the second law of thermodynamics as they tend to maintain homeostasis. However, there is a release of heat during each process of the transformation of energy. This heat is an unusable form of energy and can not perform any productive task. The heat tends to increase the disorder of the system (here, the system is a cell) and thereby makes the cells to follow the second law of thermodynamics. For example, cellular respiration uses only a part of the energy of glucose to form ATP while a large fraction of the energy of glucose is released as heat.
Mitosis results in 2 identical daughter cells from 1 parent cell.
So, following mitosis, you will have 2 cells each with 4 pairs of chromosomes.
I need more context to answer this question. What are the risk characteristics and risk types?
