You have given no demonstration based on your microscopic investigation so I cant tell you the answer to the question. I will try to help you by elaborating how to decipher..
Three terms hypotonic, hypertonic and isotonic are used when referring to two solutions separated by a selectively permeable membrane.
The hypertonic solution has a great concentration of OAS than the solution on the other side of the membrane. It is described, therefore, as having a great osmolarity. The hypotonic solution has a lower concentration of OAS, or osmolarity, than the solution on the other side of the membrane. When the two solutions are at an equilibrium, the concentration of OAS being equal on both sides of the membrane, the osmolarities are equal and are said to be isotonic.
The net flow of water is from the hypotonic to the hypertonic solution. When the solutions are isotonic, there is no net flow of water across the membrane.
If red blood cells are placed in a solution with a lower solute concentration than is found in the cells, water moves into the cells by osmosis, causing the cells to swell; such a solution is hypotonic to the cells.
So, look at the information and data you have on your microscopic investigation and use these guidelines to tell you which is which.
Answer: Option B
Explanation:
The hormones such as follicle stimulating hormone and luteinizing hormones stimulates the ovary producing multiple eggs if taken externally in the form of medication.
There are chances that the multiple eggs and at the time of fertilization more than one egg can get fertilized at the same time and twins can form.
Autotrophs are organisms that can make their own food for the biosphere.
This term comes from the Greek terms:
Auto- meaning "self" and Troph- meaning "feeding or growth"
So autotroph quite literally means "to feed oneself". Autotrophs, for the most part, use photosynthesis from sunlight to produce their own sugars.
Plants are the primary autotrophs on Earth!
Multifactorial disorder
Multifactorial disorders are
disorders that involve variations in multiple genes joined with environmental
causes. Diseases such as heart disease, type 2 diabetes, and obesity are multifactorial
disorder as they do not have single genetic cause but are caused by a
combination of environmental factors and life style with mutations in multiple
genes.
Answer:
Option C - The sympatric salamander populations evolved their present body sizes after they became sympatric.
Explanation:
First, note the definitions of each terms.
1) Sympatric occurs when organisms especially of same species occurring in the same, or in overlapping territory, do not interbreed.
2) Allopatric occurs when organisms are NOT living in the same territory and thus unable to crossbreed.
On 1st QUESTION
The argument would be strengthened by the failure of P. cinereus and P. hoffmani to crossbreed making traits for body size to become distinct (dissimilar) in each specie.
On 2nd QUESTION
Definitely, salamanders species occurring in the territory, do not interbreed after they became sympatric, thus, making characters among same species to be increasingly different over generations.
