Posted on 23 September 2010. Tags: carbon dioxide in the atmosphere, climax, combustion of fossil fuels, Community, diseased animals, fish tank, habitat community, saltwater ecosystems, science answers, secondary succession, storm clouds, succession, tidal pools, type, Water
two stars beside mine im trying to do really well so i chose the ones that i can remember and the ones that i cant i tried to best guess
1.
Sea stars live in saltwater ecosystems. Some species live in shallow tidal pools, while others live in the deepest parts of the oceans. This is a description of the ____ of sea stars. (1 point)
* habitat**
* community
* niche
* none of these
2.
Cougars are predators that often eat weakened or diseased animals. This is a description of the _____ of cougars.
(1 point)
* habitat
* community
* niche**
* none of these
3.
Nitrogen is released to the abiotic parts of the biosphere from the processes of death and _______. (1 point)
* decay by bacteria**
* infiltration of groundwater
* runoff
* lightning in storm clouds**
4.
Referring to Figure 2-1, energy flows from ______.
Figure 2-1 Energy Flow
Figure 2-1 (1 point)
* coyotes to grasses
* cats to mice
* mice to cats**
* coyotes to cats
5.
Carbon dioxide in the atmosphere enters the biotic parts of the biosphere through _______. (1 point)
* burning of forests
* photosynthesis
* combustion of fossil fuels
* all of these**
6.
What type of cycle is depicted in Figure 2-10?
Figure 2-10 Cycle (1 point)
* carbon
* water**
* phosphorus
* nitrogen
7.
Which organism shown in the pyramid shown in Figure 2-9 receives the highest percentage of energy from the sun?
Figure 2-9 Pyramid
(1 point)
* fox
* birds
* grasshoppers
* grass**
8.
A girl notices her guppies reproduce most when her fish tank water is slightly alkaline. They stop reproducing if the water becomes acidic or if the water becomes too alkaline. This is an example of ____. (1 point)
* secondary succession
* zones of tolerance and intolerance
* communities
* intertidal zones**
9.
The stable ecosystem that develops due to succession ______. (1 point)
* is called a niche
* is always a forest
* is called a climax community**
* never changes
10.
What type of succession is most likely to happen in a burned forest? (1 point)
* primary
* secondary**
* tertiary
* climax
11.
You take a sample of species from the area labeled A in Figure 3-7. What would you expect to find?
Figure 3-7 Pond Ecosystem (1 point)
* almost no life
* great species diversity
* organisms that need very little oxygen
* one dominant species of fish**
12.
What type of species would be most likely found in the area labeled D in Figure 3-7? (1 point)
* one that requires plenty of oxygen
* plants that require light
* amphibians that need a warm habitat**
* decomposers that feed on dead organisms
13.
The absence of permafrost and the presence of coniferous trees as the dominant climax plants characterize the ________. (1 point)
* taiga
* tundra
* grassland
* desert**
14.
The first organisms to appear in an area undergoing succession are known as ________. (1 point)
* predators
* pioneer species
* parasites
* organisms**
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Posted on 13 September 2010. Tags: Answer, backyard ponds, c community, cattails, emergent, emergent plants, fish, life in a pond, oxygen, pond c, pond plants, Water, water hyacinth, water lettuce, water lilies
Backyard ponds are for birds, butterflies, frogs, fish, and you and your family. In a pond, plants need to be a mix of emergent, submerging, and floating species. Emergent plants, those that have their roots in the water but their shoots above water, can be added to the edges of pools. These include cattails, arrowhead, and water lilies and are homes to many species of animals. Submerging species, or those that remain under water such as elodea, are often used as oxygenators. These are plants that remove carbon dioxide from the water and add oxygen. These plants are essential in most ponds to keep the water clear. Floating species or those that are not anchored at all in the pond include plants such as duckweed, water lettuce, and water hyacinth. While not as effective as oxygenators, these plants help keep the water clear by limiting the amount of sunlight that algae receive. The algae can not survive without a lot of sunlight.
1. According to this passage, what is the niche of “submerging” plants in a pond?
A. help keep the water clear
B. add oxygen to the water
C. provides food for the fish
D. reduce the amount of algae
2. Consider the relationships between the birds, frogs, fish and plants. What level of organization in ecology is this passage describing?
A. biosphere
B. biome
C. community
D. population
3. What is the main idea of this passage?
A. Emergent plants provide homes to many animals.
B. Oxygenators are essential to life in a pond.
C. Algae can cause water to be contaminated.
D. Plants provide many resources to life in a pond.
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Posted on 11 August 2010. Tags: Affiliate, affiliate marketer, Choice, e books, electronic formats, hypnotic suggestions, Number, own computers, reading enjoyment, recycled paper, selling success, site, source of water, source of water pollution, Water
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Posted in Affiliate Marketing Tips