The answer would be D)hormones
Answer: Only 1 structure is possible for the formula having AHXYZ having tetrahederal geometry.
Explanation: A tetrahederal molecule contains in total of 5 atoms in which 4 atoms arrange themselves around a single atom which is considered as a central metal atom. The 4 substituents are present at the corners of a tetrahedron.
For a given formula AHXYZ, when we fix atom A as the central metal atom, then only 1 structure is possible for this molecule to have a tetrahederal geometry.
The structure is provided in the image below.
Answer: The basic cell division in plant and animal cells are similar but there are still some differences.
The similarities between onion root and whitefish cell In mitosis cell division is that the four phase of mitosis I.e anaphase, prophase, metaphase and telophase occur the same way.
In prophase, the chromatins are condensed, in
Metaphase the chromosomes adjust and move to the center, in anaphase, the chromatics from metaphase are separated and move to the opposite poles. At Telophase, the cells divide through cytokinesis.
Their major differences is in cytokinesis stage.
The onion cells divide along the same axis but the white cells division is random.
Explanation:
The epidermal cell of onion give its protection against vacteria, viruses and fungi.
The white fish embryo is good to study mitosis because its cells are randomly dividing.
Answer:
The weakest of all scientific findings are given by case studies.
Explanation:
Case studies are observational or descriptive studies focalized on the analysis of a particular object (an individual, place, event, etc.) in a specific situation. Beacuse of its descriptive nature, it does not provides information about cause-effect relationships and does not consider the effect of random variations. It is the weakest of all scientific findings.
Correlational studies involves measurements of at least two different variables and try to identify if there is a specific relationship between variables, it means if there is a specific trend in the variation of one variable as a response to the variation in the other one (for example, when the temperature of a given solution increases, the solubility of the solute also increase). Although this kind of studies does not provides information about cause relationships, the trend between variables are well stated.
Experimental studies are the ones in which a researcher makes sure of providing a controled environment and manipulates a particular variable to see responses of one or more different variables. These studies provides well supported information.
Epidemiological studies the purpose to analyze all the factors involved in an epidemic (causes, incidence, evolution, etc.). It includes observational and experimental studies that complement each other. Because of the importance of these reasearch on public health, their scientific findings are well stablished and supported.
Summarizing, the weakest of all scientific findings are provided by case studies.
The answer is B I know this because I took the same subject last year
