If your choices are the following:
<span>A. rhizoids
B. sporophylls
C.leaves
D.the waxy cuticle
E. lignified vascular tissue
Then the answer is E.</span>
With a light microscope one can view the nucleus and endoplasmic reticulum, large vacuoles etc
The resolution of a light microscope is dependent on the wavelength of light that is the main beam of illumination. Light has approximately 0.4 um (UV)- 0.7um (Infrared) wavelength. Organelles smaller than about 0.5 um will be difficult to discern with a light microscope.
With an electron microscope one can view, in addition, even the ribosomes and mitochondria, chromosomes, tubules etc.
An electron microscope can discern very minute details of a cell. This is because its resolution is dependent on the very small wavelength of a beam of electrons which is approximately 0.002 um (about 10,000 times powerful than a light microscope)
Answer: I think its B
Explanation: I hope this helps :)
Answer:
The lub sound represents the <u>closing </u> of the atrioventricular valves and the dub sound represents the closure of the valves <u>between the ventricles and arteries.</u> Doctors can also use stethoscopes to monitor respiratory function. A wheezing or whistling sound most likely indicates<u> a constricted trachea.</u>
Explanation:
One can easily feel the heartbeat sound in the form of lub-dub by the stethoscope. The lub sound depicts the closure of the tricuspid valve and the mitral valves. Dub depicts the closure of the aortic and pulmonary valves.
A wheezing sound can be felt in the respiratory tract when an inflammation or blockage occurs in the airways or trachea. The wheezing sound is generally heard at the time of exhaling.
