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I need help with these two biology questions. I provided a picture of Table 2.1 which goes with question 10.

To help with any confusion in the questions, the link to a summary/overview of this chapter is: https://biolympiads.com/wp-content/uploads/2018/09/Chapter-2-Outline.pdf


Questions:

10.The percentages of naturally occurring elements making up the human body (see Table 2.1) are similar to the percentages of these elements found in other organisms. How could you account for this similarity among organisms?


11.Female silkworm moths (Bombyx mori) attract males by emitting chemical signals that spread through the air. A male hundreds of meters away can detect those molecules and fly toward their source. The sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. Each filament of an antenna is equipped with thousands of receptor cells that detect sex attractant. Based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. What predictions does your hypothesis make? Design an experiment to test one of these predictions.


Screen Shot 2020-08-27 at 8.32.33 PM.pngScreen Shot 2020-08-27 at 11.07.53 PM.png

Screen Shot 2020-08-27 at 11.07.53 PM.png
Table 2.1 Elements in the Human Body
Percentage of Body Mass
Element
Symbol
(including water)
Oxygen
no
65.0%
Carbon
18.5%
H
9.5%
96.3%
Hydrogen
Nitrogen
N
3.3%
Calcium
Ca
1.5%
Phosphorus
P
1.0%
Potassium
K
0.4%
Sulfur
S
0.3%
3.7%
Sodium
Na
0.2%
Chlorine
CI
0.2%
Magnesium
Mg
0. 1%
Trace elements (less than 0.01% of mass): Boron (B), chromium
(Cr), cobalt (Co), copper (Cu), fluorine (F), iodine (1), iron (Fe),
manganese (Mn), molybdenum (Mo), selenium (Se), silicon (Si),
tin (Sn), vanadium (V), zinc (Zn)
Screen Shot 2020-08-27 at 8.32.33 PM.png
LEVEL 3: SYNTHESIS/ EVALUATION 10. 11. EVOLUTION CONNECTION The percentages of naturally occurring elements making up
the human body (see Table 2.1) are similar to the percentages
of these elements found in other organisms. How could you
account for this similarity among organisms? SCIENTIFIC INQUIRY Female silkworm moths (Bombyx man) attract males by emitting
chemical signals that spread through the air. A male hundreds
of meters away can detect these molecules and fly toward their
source. The sensory organs responsible for this behavior are the
comblike antennae Visible in the photograph shown here. Each
filament of an antenna is
equipped with thousands of
receptor cells that detect the
sex attractant. Based on what
you leamed in this chapter,
propose a hypothesis to ac-
count for the ability of the
male moth to detect a specific
molecule in the presence of
many other molecules in the
air. What predictions does
your hypothesis make? De-
sign an experiment to test
one of these predictions.

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