The correct answer is: d) begins later in life
Eggs or female reproductive cells are formed well before birth in a huge number (primordial oocytes). But, the number of oocyte decreases after birth constantly (there are 2 million oocytes at birth and 40,000 of them in puberty). At menopause, no egg cells are left.
On the other hand, the first sperms are formed only from puberty, but the production of those cells never stops.
Answer:
Tt. TT
Explanation:
those are the only two possible, unless tall is a recessive trait, then it's tt
Answer:
Yes, glucose expel out of the body through urine, if the concentration of glucose is high in blood.
Explanation:
Glucose is monosaccharide which is used by the body for the production of energy in the form of Adenine tri phosphate. This glucose is stored by the body in the form of glycogen when its concentration is high. If glucose level is very high than optimal level in the blood so the kidney send it to the urine for the removal from blood.
Answer:
A gene map shows how the chromosomes of genes are arranged in a particular space. This allows the researcher to know how certain traits can be inherited based on the pattern they show.
Explanation:
Gene maps may be generated through: <em>physical mapping or genetic mapping. </em>Physical mapping uses the technique of molecular biology while genetic mapping utilizes genes.
This can also be used to identify disease genes, since these are caused by abnormalities in the human's genome. It allows analysis in order to identify or predict what causes mutation.
So, this explains the answer.
If a zebra mussel is discovered in a lake in Pennsylvania, then the ecologist would be worried because it is an invasive species. The zebra mussel is native to Ukraine and Russia, but if it has been found in Pennsylvania, than it means that it has been introduced in this area. As an invasive species, the zebra mussel can be very dangerous for the native species in the lake. The invasive species usually are more competitive for food sources than the native species, manage to reproduce quicker, bring in diseases, and the native species tend to not have defense mechanisms for them. This leads to rapid decline or even extinction in the native species, while the invasive spreads out quickly and takes over, resulting in dramatic change in the whole ecosystem.
