Answer:Condensing the DNA into tightly packed chromosomes makes the process of chromosome alignment
Explanation:
Throughout most of the life of a cell, the DNA is only loosely wrapped around the histones and is not in the condensed chromosomal form. ... Condensing the DNA into tightly packed chromosomes makes the process of chromosome alignment and separation during mitosis more efficient
A wax candle burns while in a sealed jar
Answer:
A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means. A compound is not a pure substance because it is not an element, and only elements are pure substances.
Answer:
Explanation:
Given information:
A designed dialysis unit consists of a large no of small hollow fibers,
Considering the one fiber,
By using the volume of blood, we have :
where:
L = 30cm = (30× 10) mm = 300 mm
Volume = 80 ml = 80 × 10³ mm
From the above equation, making D the subject, we have:
D² = 339.53
D = 18.43 mm
D = 1.843 cm
However, suppose we consider the laminar flow, the pressure loss in a single fiber can be determined as follows:
where;
Recall:
Finally, the number of needed to be used =
=
= 539.35
Answer:
trigonal pyramidal
Explanation:
In NF3, the nitrogen atom is sp3 hybridized. Now we must remember that according to the VSEPR theory, the number of electron pairs in the valence shell of the central atom in a molecule determines its shape.
Here, the nitrogen atom is the central atom and its outermost shell is surrounded by four electron pairs - one lone pair and three bond pairs. This means that it has a tetrahedral electron pair geometry.
However, due to the lone pair, the three fluorine atoms are arranged in a trigonal pyramidal geometry. Hence the correct shape of the molecule is trigonal pyramidal.