Answer:
A student visits the beach during a very hot day. She steps on the sand and jumps because it is so hot as a result of "conduction."
Explanation:
The process of the conduction happens because of the flow of kinetic energy from one molecule to the other by direct contact. When she first steps the beach on the hot sand, after that the energy moves from the hot sand to the cooler body by conduction. While walking on the sand for few time, the feet will feel hot. The movement of the heat takes place from the hot sand to the bottom of the feet by conduction. When the objects come in contact with each other the heat transfers as a result of conduction.
Answer:
As organisms adapt to changing conditions, they evolve in a way to fit their surrounding environment. According to Darwin's <em>survival of the fittest</em> concept, organisms that can adapt to fluctuating conditions are more fitter and hence selected by nature.
Here fitter means reproductive superiority.
Answer:
Lactose present, glucose absent.
Explanation:
Lac operon may be defined as a cluster of genes that regulate the metabolism of lactose in bacteria. The bacteria always prefer glucose if both glucose and lactose is present in the medium.
The conditions that causes the maximal expression of lactose is the presence of lactose and absence of glucose. This is due to the action of catabolite activator protein and cyclicAMP.
Thus, the correct answer is option (1).
Answer:
No, a blood test could not eliminate the father.
Explanation:
The mother had B type blood, so the possible genotypes are BB and BI. The father had A type blood, so the possible genotypes are AA and AI. The child had O type blood, so the only possible genotype is II. If the mother has the genotype BI and the father has the genotype AI, then there is a 25% chance the child will have the blood type O, or II (I used a punnet square with the genotypes BI and AI to solve this.)
Answer:
The sunlight's energy to change water and carbon dioxide into sugar glucose. Glucose is used by plants for energy and to make other substances like cellulose and starch.
