List three primary groups of microbes with respect to growth temperature. which group would constitute food spoilage risk and why?

Bacteria can be grouped based on the temperature on which their growth is favorable.

Thermophiles: A thermophile can be defined as an organism that can grow a high temperatures. The temperature ranges from 41 to 122 °C. They are found in hydro thermal vents  and are found to be oldest on earth.

Mesophiles: It can be defined as organism which best grows in the temperature that is neither hot nor cold. The temperature ranges in between 20 to 45 °C.

Psychrophiles: It can be defined as the organism that tend to survive in colder conditions which ranges in between −20 °C to +10 °C.

Most of bacteria that constitute in food spoilage are mesophiles because food is usually kept at room temperatures which favors its growth.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: