Let's compare the lifecycle of humans (diplontic) with Chlamydomonas (haplontic). Which of the following is a correct comparison of the two lifestyles? O A. In a diplontic species, meiosis is required for cell division of the mature organism. B. A diploid zygote is only formed in a diplontic species; it is not found in haplontic species. C. Mitosis is required for cell division only in haplontic species like Chlamydmonas. D. Chlamydomonas is haplontic: the cells growing in culture are haploid.

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Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.