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English, 21.06.2019 22:00
Biologists recognize five levels of cell organization. the lowest and simplest is the cellular level. organisms here are either unicellular organisms, like protozoa, or colonial organisms. colonial organisms are composed of single-celled individuals that stay together to sustain the life of the whole colony. next on the scale of complexity is the level occupied by tissue. a tissue is a group of similar cells which perform a similar activity. tissues that are organized around a common function together make up an organ, the third level of complexity. the fourth level of organization is the system, formed by a group of organs which together perform a specific bodily process. the fifth and highest level is the organism level, in which body systems work together in a structure capable of independent life. main idea:
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English, 22.06.2019 01:20
Read the excerpt from "the most dangerous game." again rainsford lifted the heavy knocker, and let it fall. the door opened then, opened as suddenly as if it were on a spring, and rainsford stood blinking in the river of glaring gold light that poured out. the first thing rainsford's eyes discerned was the largest man rainsford had ever seen—a gigantic creature, solidly made and black bearded to the waist. in his hand the man held a long-barreled revolver, and he was pointing it straight at rainsford's heart. the details of this excerpt show that rainsford sees ivan as a(n) individual.
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English, 22.06.2019 05:10
What is the best way to manage oil transport on waterways? a. prevent oil spills and regulate the amount of oil that can be shipped at one time.b. use a skimmer, containment boom or chemical dispersant to clean up spilled oil.c. burn off oil spills from the water's surface when they occur.
Answers: 1
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