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BabaBlast [244]
3 years ago
11

In food chains and webs what trophies level must you have more of than others?

Biology
2 answers:
Phantasy [73]3 years ago
6 0
More autotrophs than heterotroph. 
Umnica [9.8K]3 years ago
4 0
The primary producers creatures that makes their own food like plants.
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What refrigerant safety group classification has the highest flammability and the highest toxicity?
timama [110]

Answer;

-B3

Explanation;

Refrigerants are divided into two groups according to toxicity:

-Class A signifies refrigerants for which toxicity has not been identified at concentrations less than or  equal to 400 ppm;  and

-Class B signifies refrigerants for which there is evidence of toxicity at concentrations below 400 ppm.

They are also divided into three groups according to flammability:

-Class 1 indicates refrigerants that do not show flame propagation when tested in air at 21°C and 101  kPa;

-Class 2 indicates refrigerants having a lower flammability limit of more than 0.10 kg/m3  at 21°C and  101 kPa and a heat of combustion of less than 19 kJ/kg;

-Class 3 indicates refrigerants that are highly flammable as defined by a lower flammability limit of less  than or equal to 0.10 kg/m3  at 21°C and 101 kPa or a heat of combustion greater than or equal to 19  kJ/kg.

-Therefore; the answer for the above question would be Class B and class 3.

3 0
3 years ago
Read 2 more answers
LOTS OF POINTS!!PLEASE HELP
miskamm [114]
"Mangroves live life on the edge. With one foot on land and one in the sea, these botanical amphibians occupy a zone of desiccating heat, choking mud, and salt levels that would kill an ordinary plant within hours. Yet the forests mangroves form are among the most productive and biologically complex ecosystems on Earth. Birds roost in the canopy, shellfish attach themselves to the roots, and snakes and crocodiles come to hunt. Mangroves provide nursery grounds for fish; a food source for monkeys, deer, tree-climbing crabs, even kangaroos; and a nectar source for bats and honeybees.

As a group, mangroves can’t be defined too closely. There are some 70 species from two dozen families—among them palm, hibiscus, holly, plumbago, acanthus, legumes, and myrtle. They range from prostrate shrubs to 200-foot-high (60 meters) timber trees. Though most prolific in Southeast Asia, where they are thought to have originated, mangroves circle the globe. Most live within 30 degrees of the Equator, but a few hardy types have adapted to temperate climates, and one lives as far from the tropical sun as New Zealand. Wherever they live, they share one thing in common: They’re brilliant adapters. Each mangrove has an ultrafiltration system to keep much of the salt out and a complex root system that allows it to survive in the intertidal zone. Some have snorkel-like roots called pneumatophores that stick out of the mud to help them take in air; others use prop roots or buttresses to keep their trunks upright in the soft sediments at tide’s edge. These plants are also land builders par excellence. Some Aborigines in northern Australia believe one mangrove species resembles their primal ancestor, Giyapara, who walked across the mudflats and brought the tree into existence. The plants’ interlocking roots stop river borne sediments from" coursing out to sea, and their trunks and branches serve as a palisade that diminishes the erosive power of waves.

8 0
2 years ago
How is the atmosphere a system, include components, inputs, outputs & flow.
kvv77 [185]

Answer:

the flow in systems besides the flow.

Explanation:

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2 years ago
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A plant cell is filled with cell sap what is it
Mekhanik [1.2K]
Cell sap is the liquid contained within a plant cell vacuole.<span> The chemical composition of this liquid differs significantly from the materials contained outside the vacuole in the surrounding cytosol. This difference aids in the transfer of materials across the vacuole's membrane, called the tonoplast.</span>
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3 years ago
Drag the tiles to the correct boxes to complete the pairs. Match the soil conservation technique to its explanation.
oksian1 [2.3K]

Answer:

contour farming => process of growing crops perpendicular to the direction of the land's slope.

grassed waterways =>planting grass in shallow channels.

crop rotation =>practice of growing different crops in succession in a field.

cover cropping and mulching => process of covering the soil surface around a plant with materials such as hay or leaf debris.

6 0
3 years ago
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