Answer:
which give the options na
Answer:
3. the absence of a cell wall in human cells
Explanation:
Animal cells do not have cell walls. Cell membranes separate the cytoplasm of the animal cells from the surroundings and maintain their interior. Plant cells have cellulosic cell walls. A cell wall surrounds the cell membrane of a plant cell. Cell walls serve to provide structural support and protect plant cells from pathogens. Cell walls also help keep excess water out of cells so they do not burst. Therefore, human cheek cells would not have cell walls while the onion cells would have cell walls made up of cellulose.
The body wouldn't be able to fight off dangerous and deadly pathogens or produce energy from the nutrients a human digests. The body also wouldn't be able to undergo functions necessary for survival such as respiration, digestion, and excretion. Basically without a system of organs that assign each part of the body a specific job, the human body would just be a cluster of cells like most bacteria.
Is the first one
Two water molecules ,h20
Answer:
D. Lots of vegetation
Explanation:
Urban heat islands form when cities replace natural land cover with dense concentrations of heat-absorbing pavement, buildings, and other surfaces. This has the impact of raising energy prices (for example, air conditioning), air pollution levels, and heat-related sickness and mortality.