Download A Closer Look at Bacteria, Algae, and Protozoa (Introduction by Sherman Hollar PDF

By Sherman Hollar

Micro organism, algae, and protozoamicroorganisms which are simply missed in our day-by-day livescan be present in a wide selection of destinations and serve innumerable ecological reasons. whereas a few such organisms were linked to illness, they've got additionally been important in agriculture and within the construction of convinced meals, drugs, and different prerequisites. This informative quantity examines the homes and makes use of of those strong and crucial lifestyles kinds. photo organizers and designated photos convey the miniscule information of those entities to the leading edge.

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Extra resources for A Closer Look at Bacteria, Algae, and Protozoa (Introduction to Biology)

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Among the largest of the kelp are members of the genera Laminaria, Macrocystis, and Nerocystis. Brown algae are so colored because of the presence of a brown pigment called fucoxanthin. Because the amount of this pigment can vary from species to species, phaeophyte species range in color from olive green to dark brown. Brown algae may undergo asexual or 55 A closer look At BActerIA, AlgAe, And ProtozoA Species of brown algae such as Laminaria digitata,, commonly known Caption TK as kelp, are harvested from kelp beds along rocky shores.

The majority of red algae live in tropical marine habitats, and most species are multicellular. Red algae have a complex life history, which means they go through several stages of development as independent organisms in order to complete their life cycle. Most undergo sexual reproduction. Like many algae, rhodophytes contain chlorophyll and thus are able to photosynthesize their own food. Red algae also contain the reddish pigment phycoerythrin, which confers on them their characteristic color.

This results in a “bloom” that covers lakes and ponds, blocking light from reaching the lower depths. This sets off a chain of events: the decreased light causes a drop in photosynthesis, which leads to dramatically reduced oxygen production. Many organisms such as fish and zooplankton that live in the deeper zones of the water are dependent on the oxygen produced from the photosynthesis of algae and aquatic plants. But when photosynthetic rates drop and oxygen production ceases, these organisms die.

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