Answer
A stem cell has both positive and negative ethic effect
Explanation
Some people think it is ethically wrong to change natural stem cell. According to such people stem cell should not be used for research or other purposes because it directly influences the life which is going to develop from a stem cell. Stem cell use has an ethically positive effect as it treats the number of inherited diseases and everyone has the right to get a child of gender which they want.
This reserve is home to terrestrial and marine mammals, including grizzly and polar bears, caribou, wolves, and wolverine as well as beluga and bowhead whales, walrus, and several species of seals. It was established for the purpose of preserving unique wildlife, wilderness, and recreational values.
The most complex level of organizational hierarchy in the Arctic National Wildlife Refuge that is preserved is every ecosystem in the area.
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C. Every ecosystem in the area
B) Mutations can be positive and produce organisms with improved traits.
C) Mutations can be fatal to the organism that has a mutation, if the mutation is in a critical gene.
D) Mutations can be silent, and not affect the organism that has them, if the mutation is in a non-critical area.
Answer: The correct answer is- A) Mutations must be present in parents and then passed to offspring.
Mutation can be described as the permanent change in the genetic material ( DNA) of an organism. It can be beneficial or harmful to the life form. Mutations can be heritable ( that is passed from one generation to the next) or non inheritable ( not passed from parents to offsprings).
A silent mutation ( change in the nucleotide sequence without any change in the amino acid sequence) that does not show any observable effects in the phenotype of the organism.
Thus, only option A) is not true about mutation.
All the statements are true about mutations except Mutations must be present in parents and then passed to offspring.
Thus, An organism's observable traits, or phenotype, may or may not change as a result of a mutation. Evolution, cancer, and the maturation of the immune system, including junctional variety, are among the normal and malignant biological processes in which mutations play a role.
All genetic variety originates from mutation, which also provides the basis for the action of evolutionary forces like natural selection.
Sequence changes can take many distinct forms as a result of mutation. Gene mutations can have no effect, change the gene's product, or stop the gene from working fully or correctly. Non-genic areas are likewise susceptible to mutation.
Thus, All the statements are true about mutations except Mutations must be present in parents and then passed to offspring.
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B. in randomly arranged bundles
C. in bundles near the outer edge
D. in a cross shape within the stem
The arrangement of vascular bundles in dicot stem is in the form of bundles in a ring.
Vascular bundles are the conducting tissues of the plant body. Their arrangement is quite different in monocots and dicots.
The vascular bundle in dicots are more complicated than that of monocots and arranged in the form of rings. They are designed in such a way that pits are concentrated at the core of the stem rather than being scattered throughout the plant.
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