oxygen in the air is at a dangerous level
the amount of pollutants in the air is unhealthy
acid rain is likely to fall
Answer:
the amount of pollutants in the air is unhealthy
Explanation:
AQI or Air Quality Index assesses the air quality. It indicates how clean or unhealthy the air is and its effects. It is calculated by measuring the concentration of major air pollutants across many locations in the country. The air quality is divided into six categories:
An AQI of 201 means that the air quality is very unhealthy. Everyone is susceptible to health hazards in this air quality.
meteorites are composed of the original material from which earth was formed. Their compositions range from metallic meteorites made of iron and nickel to stony meteorites composed of dense rock like peridotite
it is true being put into a classified group helps the scientist know a lot more about the organism
Land Plants
Bacteria
Protists
Question:
Place the above organisms in order of when they first appeared on Earth. Describe two (2) of the methods used by scientists to arrive at this conclusion.
Answer: 1st part Because plants cannot walk around and take their seeds to other places, they have developed other methods to disperse (move) their seeds. The most common methods are wind, water, animals, explosion and fire
2nd part plant tropisms are mechanisms by which plants adapt to environmental changes. Thigmotropism describes plant growth in response to touch or contact with a solid object. Positive thigmostropism is demonstrated by climbing plants or vines, which have specialized structures called tendrils. Gravitropism or geotropism is growth in response to gravity.
Answer:
2)During photosynthesis, plants take the water from the soil, and the carbon dioxide from the air, and they make sugars out of it. When plants have the right balance of water, air, sunlight and nutrients, their cells grow and divide, and the whole plant gets bigger and bigger. And that's how plants grow.
Phototropism is the orientation of a plant or other organism in response to light, either toward the source of light.
Thigmotropism is the turning or bending of a plant or other organism in response to a touch stimulus.
Gravitropism is a coordinated process of differential growth by a plant in response to gravity pulling on it.
Explanation:
organisms.
B. photosynthetic prokaryotes; anaerobic prokaryotes; aerobic prokaryotes; eukaryotes- multicellular
organisms.
C. anaerobic prokaryotes; photosynthetic prokaryotes; aerobic prokaryotes; eukaryotes-multicellular
organisms.
D. aerobic prokaryotes; eukaryotes; anaerobic prokaryotes; photosynthetic prokaryotes; multicellular
organisms.
Answer:
C. Anaerobic > Photosynthetic > Aerobic > Eukaryotic
Explanation:
The earth wasn't oxygenated until after the first big Ice Age, so the majority of organisms did not use oxygen to carry out specific processes. Photosynthesis would have occurred before aerobic bacteria. Eukaryotes appeared much later due the amount of coordination it takes for cells to function as one/
The sequence is anaerobic prokaryotes the photosynthetic prokaryotes the aerobic prokaryotes and the eukaryotes that are multicellular organisms. Thus option C is correct.
They are anaerobic organisms that can switch between air respiration and fermentation that depends on the oxygen availability They are bacteria as and obligates that lives and grow in presence of molecular oxygen.
As the earth had no oxygen until the ice age most organisms did not use oxygen in order to carry out specific processes.
Find out more information about the prokaryotes.