Answer:
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Explanation:
B. William Bradford
C. Sarah Orne Jewett
D. Charles Waddell Chesnutt
The correct answer is (a) Mark Twain and Charles Waddell Chesnutt
Mark Twain and Charles Waddell Chesnutt are the authors of American literary realistic fiction. In this period the main technique of writing was realism. The subject matter especially represented the middle class life of America. The real face of the society was represented by both of the authors.
It can be prevented by wearing a protective vest.
It produces chemicals that can be inhaled.
It is found in synthetic dyes and cosmetics.
An agent able to cause DNA mutations is called mutagen. UV light is the most common source of radiation that affects DNA, but it is a weak radiation and it penetrates only the surface cells of your skin. However, UVA radiation is considered as a mutagen because it penetrates deep into the skin and can cause mutations.
UVA light is a mutagen because it can penetrate the skin and cause DNA damage. This damage can lead to mutations and potentially skin cancers. Protective clothing and sunscreen can help mitigate the risk.
UVA light is considered a mutagen because it has the ability to penetrate the skin and cause mutations. It does this by causing damage to the DNA in the cells of the skin. When UVA light hits the skin, it can break DNA strands or cause errors during DNA replication, which can result in mutations. Over time, these mutations may accumulate and lead to skin cancers like melanoma.
One way to protect oneself from UVA light is by wearing protective clothing or using sunscreens. However, prevention is not always complete, as some amount of UVA light can still get through these protective barriers.
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Answer:
Pulling apart or separation of sister chromatids
Explanation:
Meiosis is a type of cell division that results in four daughter cells with each having half number of chromosomes as the parent cell. It is the cell division that leads to formation of gametes to enable sexual reproduction. Division occurs twice during meiosis because before the two halves of a duplicated chromosome called sister chromatids separate, it still needs to separate homologous chromosome, which is a similar but non-identical pair of chromosome received from both parents. Hence, meiosis occurs in a two step division process i.e. Meiosis I and Meiosis II.
Meiosis II is the mitotic division of each of the haploid cells produced in meiosis I. Note that, homologous chromosomes separate in anaphase I of meiosis I, and further undergoes cytokinesis (division of cytoplasm) to produce two haploid (reduced number of chromosomes) daughter cells.
During anaphase of meiosis II, the individual chromosomes (sister chromatids) separate at the centromeres (point of attachment between two sister chromatids). The separated chromosomes are pulled apart towards each pole of the cell by the spindle fibres.
autotrophic, cellulose in cell walls
vascular tissues, heterotrophic
vascular tissues, autotrophic
Answer: heterotrophic, chitin in cell walls
Fungi is a group of eukaryotic organisms, which can be grouped into Kingdom of Fungi. This kingdom includes organisms ranging from small microorganisms such as yeast and molds to large mushrooms. The fungi are different from plants, animals and bacteria as they possess chitin in their cell walls. However, these organisms can be more related to animals rather than to plants as they cannot produce their own food by the process of photosynthesis like plants. These organisms are dependent upon other organisms and their dead remains to obtain their food.
Answer:
The correct answer is heterotrophic and chitin in cell walls.
Explanation:
Fungi refer to a kingdom of eukaryotic, heterotrophic species like the animals, as they attain their food from other species. That is, by captivating nutrients from the environment, either from the non-living or living organic matter. This is due to the fact that they do not contain chlorophyll pigment, unlike plants that are autotrophic in nature, as they produce their own food.
The fungi are non-vascular in nature, as they do not possess vascular tissues like phloem and xylem, unlike the plants. The cell wall of fungi is mainly formed of chitin, unlike plants that comprise cellulose in their cell walls.
b. physical model
c. computer model
d. none of the above
Answer: Option A Idea model
Explanation: