Tracheae to distribute oxygen
Reuben.
Low sperm count does equate to impotence, and neither does descended testicles or erectile dysfunction.
Answer:
C.haploid
Explanation:
as the egg and the sperm carry half the number of chromosomes,just to differentiate the genetic material in two cells we call the egg and sperm as haploid and the fertilized cell as diploid, so the two can be easily differentiated.
Answer:
metamorphic-existing rocks are exposed to extreme conditions
sedimentary rock-layers of sediment dry together
igneous rock-magma or lava cools and solidifies.
Explanation:
Enzymes function best at the normal pH level they were made to be in. Most work best at a neutral pH level (7), but some enzymes such as pepsin (located in the stomach) work best in very acidic pH levels. If the pH level becomes too acidic for the enzyme, it can lead to denaturing of the enzyme's active site.
