Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Concept explainers
Animal Diversity
Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.
Platyhelminthes
Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.
Question
Transcribed Image Text:Organization of the Biosphere
eeh's biosphere is made up of ecosystems. An ecosystem includes all of the biotic and
ahiotic components in a given area. The living components in an ecosystem are called
bietic factors. The nonliving components of ecosystems are abiotic factors. Energy and
matter cycle through these various components. Similar to other systems, an ecosystem
also has feedback mechanisms that keep it balanced and restore it to a balanced state
when disrupted.
INFER Write the correct term in the appropriate box:
biome
biosphere
community
ecosystem
organism population
Ecologists can study ecosystems at different scales. They may study an individual
organism, such as a mule deer, to learn more about factors that affect that species.
They may also study an entire population of mule deer. A population is a group of
the same species that lives in the same area. Multiple populations of different species
form a community, In the Sierra Nevada, an ecologist may study how a community
of mule deer, Belding's ground squirrels, and birds in a certain giant sequoia grove
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