First of all, this was a bit garbled up, so it is sort of incomplete.
You gave me a total of 43 words, and I only counted 41 slots on the crossword graph itself, which is problematic.
I got as far as I could, but some of the words either weren't provided, or the spaces were made incorrectly for the length of these words.
Across:
2. (black / pitch)
7. conservation
9. radiation
12. crest
13 ?
14. <em>whatever you wrote</em>
15. dense
18. ? (radiant)
19. ? (radiant)
20. amperes
23. medium
25. density
26. ?
30. resistance
31. (pitch / black)
34. voltage
35. insulator
38. amplitudes
39. thermal
40. ?
41. wavelength
Down:
1. electromagnetic
3. (conduction/ convection)
4. (convection/ conduction)
5. (current/ radiation)
6. heat
7. chemical
8. transverse
10. energy
11. nuclear
12. circuit
16. electrical
17. electrons
21. mechanical
24. source
28. ?
32. rise
33. MRS CHEN
34. volts
36. sound
Oc would be the answer to this question
A is the right answer because it is.
Large brain size, small and flat face, small jaws and teeth, exploitation of diversity are some common features of <em>homo </em>species. <em>Different</em><em> </em><em>homo </em>species have different shapes of skulls.
Homo, genus of the family Hominidae (order Primates), is distinguished by a relatively large cranial capacity, limb structure adapted to a habitual erect posture and a bipedal gait, well-developed and fully opposable thumbs, hands capable of power and precision grips, and the ability to make standardized precision tools by combining one tool with another.
<em>Different </em><em>Homo </em>species are differentiate from skull shapes. Their body shapes also tends to vary. This is due to different environment conditions in different time zones.
However,<em> Homo</em> species show many common characteristics such as Large brain size, small and flat face, small jaws and teeth.
#SPJ1
To learn more about <em>Homo</em> species follow this link:
brainly.com/question/10169640?referrer=searchResults