There was a chemistry lab and they took water samples to be tested.
Answer:
Gymnosperms and lower vascular plants have sieve cells as their sieve elements, while sieve tubes are characteristic of flowering plants angiosperms. In gymnosperms, typical companion cells are lacking in the phloem. In gymnosperms, generally the xylem contains only tracheids. Vessels are absent.
Explanation:
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Answer: 39.86 g/mol
Explanation:
Assuming this gas is at a pressure of 
and a temperature of 
, we can solve this problem with the Ideal Gas Law equation:
(1)
Where:
is the pressure of the gas
is the volume of the gas
the number of moles of gas
is the gas constant
is the absolute temperature of the gas in Kelvin
On the other hand, we know the density 
is given by a relation between the mass 
and the volume :
(2)
Then, the mass is:
(3)
Another important fact here is that the molar mass 
of an element is given by a relation between the mass of that element and the number of moles it contains:
(4)
Isolating :
(5)
Substituting (5) in (1):
(6)
Substituting (3) in (6):
(7)
Isolating :
(8)
Simplifying:
(9)
Solving with the given data:
(10)
Finally:
This is the molar mass of the gas
to the lower concentration point,
water molecules diffuse into the vacuole and it enlargers. The cell is said to be turgid
Answer:
population density I hope this helps
