Answer:
By using specialized external systems.
Explanation:
To maintain homeostasis, unicellular organisms grow, respond to the environment, transform energy, and reproduce.
Answer:
Human: deciduous teeth: 212/212; adult = 2123/2123. Both childhood molars are replaced by adult premolars. Adult total is double the formula = 32
Explanation:
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Flow of individuals in and out of a population introduces new alleles and increase genetic variation within that population. Mutations: changes to an organisms DNA that create diversity within a population by introducing new alleles.
Some fruits—for example, the dandelion—have hairy, weightless structures that are suited to dispersal by wind. Seeds dispersed by water are contained in light and buoyant fruit, giving them the ability to float. Coconuts are well known for their ability to float on water to reach land where they can germinate.
Answer:
Without DNA, cells could not reproduce, which would mean the extinction of the species. Normally, the nucleus makes copies of chromosomal DNA, then segments of DNA recombine, and next the chromosomes divide twice, forming four haploid egg or sperm cells.
Explanation:
