If your observations had not been restricted to the area of the root tip that is actively dividing, how would your results have been different?Cells are in interphase 90% of the time, and, since most of the creation of plant cells occurs in the root tips, you would witness mostly interphase. 2.Based on the data in Table 3.1, what can you infer about the relative length of time an onion root tip cell spends in each stage of cell division?Most of a cells life cycle is spent in interphase. Metaphase is the longest stage of mitosis, and anaphase is the shortest.1.List three major differences between the events of mitosis and meiosis.Meiosis has four nuclear divisions, whereas, mitosis only has one; meiosis creates four haploid cells, whereas mitosis creates two diploid cells; and meiosis is the only one taking part in crossing over.2.Compare mitosis and meiosis with respect to each of the following in Table 3.2:Table 3.2Mitosis MeiosisChromosome Number of Parent Cells2n2nNumber of DNA Replications11Number of Divisions12Number of Daughter Cells Produced24Chromosome Number of Daughter CellsDiploid (2n)Haploid (n)Purpose/FunctionRepair and GrowthGamete and Spore
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The answer is A. Oligotrophic lakes are clear and hence
have little vegetation in them (hence no net primary production) that
could initiate the process of eutrophication. Eutrophication is brought about when bacteria
break down the high amount of organic matter hence reduce the oxygen supply in
the waters.
Answer:
single-strand DNA-binding protein
Explanation:
Based on the scenario being described within the question it can be said that these proteins are known as single-strand DNA-binding protein. They are protein mainly in the E. Coli bacteria, and bind to single-straded regions of DNA. They are a main functional part of everything related to DNA metabolism such as replication, recombination, and repair.
The answer is ‘Connective tissue often consists of
relatively few cells embedded in an extracellular matrix’. Epithelial,
connective, muscle, nervous are the other types
of animal tissue. The reason the connective tissue
is composed largely of fibers and few
cells is due to its role in support (and holding
together organs) and protection.
Answer:
Explanation:
cystic fibrosis is an autosomal recessive disorder. When the child receives the defective gene from both of his parents, he suffers from cystic fibrosis. Because his parents are carriers. In recessive genetic disorder, the genes will be expressed when both recessive genes are present in one person. The person suffering from this disease have a lung infection and pancreatic dysfunction.
In this cystic fibrosis, genes are located in chromosome 7. The effective gene is the CFTR gene. The CFTR gene is present in the DNA and by transcription, this forms CFTR protein. This is a channel protein and transports chloride ion.
This CFTR protein transports chloride ions and it makes a balance in the cell membrane. These genes are commonly present in the epithelial cells. Outside the epithelial mucus is present to keep the cells moist.
The epithelium gets a lack of water and chloride due to the defect. Therefore cells need CFTR proteins also. This causes lung infection and pancreatic disorder.
