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Nady [450]
3 years ago
13

A salamander is a vertebrate that spends part of its life cycle in water (juvenile stage) and part on land (adult stage). In bot

h life stages, the salamander's body temperature depends on its surrounding environment, so the salamander demonstrates _________ behavior.
Biology
2 answers:
lesya692 [45]3 years ago
8 0

Answer:

Ectothermic

Explanation:

Ectothermic behavior is a type of behavioral mechanisms adopted by animals to regulate their body temperature by depending on the temperature of their environment or external source. These behavior is exhibited by animals that do not produce heat internally to regulate their body temperature, but rely on the external heat sources to maintain their body temperature, which is vital for the normal functioning of their body.

Anestetic [448]3 years ago
6 0

Answer:

Explanation:

Answer:

ectothermic

Explanation:

<em>Ectotherms or ectothermic organisms are organisms whose body temperature vary depending on the temperature of their immediate external environment. </em>

They are also referred to as cold blooded organisms and have varying biological mechanisms to cope with extremes which include being dormant during extreme temperatures, secreting heat-shock protein during heat stress and so on.

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myrzilka [38]

Answer:

Air pollution harms human health and the environment. In Europe, emissions of many air pollutants have decreased substantially over the past decades, resulting in improved air quality across the region. However, air pollutant concentrations are still too high, and air quality problems persist. A significant proportion of Europe’s population live in areas, especially cities, where exceedances of air quality standards occur: ozone, nitrogen dioxide and particulate matter (PM) pollution pose serious health risks. Several countries have exceeded one or more of their 2010 emission limits for four important air pollutants. Reducing air pollution therefore remains important.

Air pollution is a local, pan-European and hemispheric issue. Air pollutants released in one country may be transported in the atmosphere, contributing to or resulting in poor air quality elsewhere.

Particulate matter, nitrogen dioxide and ground-level ozone, are now generally recognised as the three pollutants that most significantly affect human health. Long-term and peak exposures to these pollutants range in severity of impact, from impairing the respiratory system to premature death. Around 90 % of city dwellers in Europe are exposed to pollutants at concentrations higher than the air quality levels deemed harmful to health. For example, fine particulate matter (PM2.5) in air has been estimated to reduce life expectancy in the EU by more than eight months. Benzo(a)pyrene is a carcinogenic pollutant of increasing concern, with concentrations being above the threshold set to protect human health in several urban areas, especially in central and eastern Europe.

"Air pollution is causing damage to human health and ecosystems. Large parts of the population do not live in a healthy environment, according to current standards. To get on to a sustainable path, Europe will have to be ambitious and go beyond current legislation."

Explanation:

6 0
2 years ago
Read 2 more answers
Compare and contrast light microscopes, scanning electron microscopes, and transmission electron microscopes. Sort each statemen
podryga [215]

Answer:

<u>Light microscope</u>:

  • use a beam of light to produce magnified images
  • can be used to examine living cells and tissues

<u>Scanning electron microscope</u>:

  • use a beam of electrons to produce magnified images
  • can be used to examine DNA
  • can be used to examine cells

<u>Transmission electron microscope</u>:

  • use a beam of electrons to produce magnified images
  • can be used to examine DNA
  • can be used to examine cells

Explanation:

Light microscope: is a commonly used microscope also known as compound microscope. Magnifies images from 40X upto 1000X. It uses ray of visible light to produce a magnified image. The light microscope can be used to view specimen of both living and dead cells or tissues. However, it doesn't give a detailed view of a specimen like electron microscope.

Scanning electron microscope: It uses electron beam as an illuminating source. It has a much higher resolving power than light microscope because it uses electrons instead of light. It magnifies object upto 500000 times the actual size. Internal structures can also be viewed. However, only dead specimen can be used because the beam of electrons can kill the cells. They are of two types:

  1. <u>Scanning electron microscope(SEM): </u>an electron beam passes over the specimen's surface and displaces electrons which are then focused on  a screen to form an image. Images appear in 3-D
  2. <u>Transmission electron microscope: </u>electromagnets magnify the image by passing beam of electrons through a thin specimen. Images appear in 2-D

7 0
3 years ago
In addition to paleomagnetism, what other evidence was needed to determine the rate of seafloor spreading?
expeople1 [14]
For the first question, the age of each strip of rock is needed to determine the rate of seafloor spreading. The answer is B.
For the second question, the answer is A.
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How much energy is used by the organism or lost to the environment as heat between trophic levels
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90% of the energy is lost to the environment as heat and only 10% is transferred per trophic level
3 0
3 years ago
Look at the glycerol molecule. Its chemical formula is...
DaniilM [7]

The correct chemical formula for Glycerol is option D. C_{3} H_{8} O_{3}

  • A naturally occurring alcohol is glycerol. It is an odorless liquid that is employed as a medication, solvent, and sweetener.
  • Glycerol pulls water into the intestines when it is present, softening stools and easing constipation.
  • Glycerol draws water so that it stays in the body for a longer period of time when it is present in the blood. An athlete may be able to exercise longer as a result.
  • In numerous personal care products like toothpaste, mouthwashes, shaving cream, and soaps, glycerol is utilized as an emollient, humectant, solvent, and lubricant. A
  • Additionally, the pharmaceutical industry uses glycerol because of its hygroscopic qualities to stop lotions and ointments from drying out.

So, the correct chemical formula for Glycerol is option D. C_{3} H_{8} O_{3}

Learn more about glycerol here:

brainly.com/question/4931795

#SPJ1

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