Scientists classify living things in order to organize and make sense of the incredible diversity of life. Modern scientists base their classifications mainly on molecular similarities. They group together organisms that have similar proteins and DNA.
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A possible Hypothesis probably .
Answer:
Cytoskeletal elements play important roles in cell division. The mitotic spindle apparatus is made of "microtubules" and pulls sister chromatids apart, whereas the contractile ring is made of "actin filaments" and required for the separation of daughter cells at the end of the mitotic phase of the cell cycle.
Explanation:
The three chief organizational apparatuses of the cytoskeleton are microtubules (formed by tubulins), microfilaments (formed by actins) and intermediate filaments. All three apparatuses cooperate with each other non-covalently. The cytoskeleton is composed of protein filaments and is found throughout the inside of a eukaryotic cell. The cytosol is the main component of the cytoplasm, the fluid that fills the inside of the cell. The cytoplasm is everything in the cell except for the cytoskeleton and membrane-bound organelles.
Answer:
Increased global temperatures, leading to a 20% reduction in rainfall
Explanation:
According to this question, forest fires are becoming rampant in tropical rainforests. Although this occurrence is natural, tropical rainforests do not typically undergo this natural process due to the average yearly amount of rainfall. This means that the high amount of rainfall in tropical rainforests help prevent or reduce the high cases of forest fire incidence.
However, the recent increased occurrence of tropical rainforest fires is most likely attributed to an INCREASE IN GLOBAL TEMPERATURES, LEADING TO A 20% REDUCTION IN RAINFALL. This is because an increase in the global atmospheric temperature causes the reduction of the amount of rainfall, which naturally helps curb the occurrence of forest fires.
Out of the following
given choices;
a. Valine instead of glutamic acid in the
sixth position
b. Glutamic
acid replacing valine in the first position
c. Extensive
amino acid substitutions
d. Trinucleotide
repeats
e. Frameshift substitutions
The answer is A. this is caused by a mutation in the beta
thalassemia genes on one of the 46 human chromosomes (chromosome #11) of the individual.
The alpha subunit is normal in people with sickle cell disease. When sickle
hemoglobin releases oxygen in the peripheral tissues, the molecules tend to
stick together and form long chains or polymers. These rigid polymers distort
the cell and cause it to bend out of shape from
the normative disc shape.