Answer: ammonia
Explanation: Nitrogenous wastes in the body tend to form toxic ammonia, which must be excreted. Mammals such as humans excrete urea, while birds, reptiles, and some terrestrial invertebrates produce uric acid as waste. Uricothelic organisms tend to excrete uric acid waste in the form of a white paste or powder
The answers are;
The muscular contractions are wave-like
The muscular contractions are entirely involuntary
This action is called peristalsis.
It is powered by the expansion and contraction of the smooth muscles present in the esophagus. It is controlled by the sympathetic activity of the autonomic nervous system hence
the movements are involuntary.
Answer:mismatch repair
Explanation:proof reading is a process through which the mistakes that were made during the process of replication of DNA are corrected and if they are corrected after replication of DNA the process is called mismatch repair .
DNA Mismatch repair also called as MMR is a system for recognizing and repairing the DNA for unwanted insertion, deletion, and mis-incorporation of bases that can arise during DNA replication and recombination, as well as repairing some forms of DNA damage.
1000 meters are in a kilometer
