The culprit is an "arctic outbreak" that originated just above the US-Canada border, which is freezing temperatures across much of the US territory.
<h3>Arctic outbreak</h3>
"Bursts" of cold air like this are usually confined to the Arctic region thanks to a series of low-pressure systems, says the NWS. However, one of these waves advanced through Canada and "escaped" to the US.
According to experts heard by Reuters, it is a vast mass of icy air in the atmosphere, which brings with it frigid temperatures - which can be prolonged if storms form.
From this information we can conclude that according to the US Weather Service (NWS), the culprit is an "arctic outbreak" that originated just above the US-Canada border, which is freezing temperatures across much of the US territory.
Learn more about arctic in brainly.com/question/1248314
Answer:
soil and vegetative matter screening for soil structure integrity and invasive pathogens
Explanation:
Repeated use of fertilizer causes the soil to break down and lose it nutrient capacity. This in turn will affect the integrity of the plants, now in a nutrient deficit environment. In addition to this, soil micro-biome environment may also be compromised once soil structure and nutrient is lost. Some of the bacteria, fungi and protozoan in the soil plays a role in defense against invasive pathogens. When this is lost the possibility for infection and increased risk of unknown pest and disease is imminent.
The dermal tissue of a plant is the extremely thin outer layer of the soft parts of a plant. It is also known as the epidermis. Epidermal cells are flattened and very close together. Stomata are found in the dermal tissue. ... Adaptations of the dermal tissue include epidermal hairs and root hairs.
Answer:
PVR is calculated by the formulae: 
Explanation:
Pulmonary vascular resistance may be defined as the resistance to blood through the pulmonary circulation.
PVR can be determined by the following formula:
Here, PAP is the pulmonary artery pressure, PAOP is pulmonary artery occlusion pressure and CO is cardiac output.
The the best part of these apps which I think I might have to delete it for example would
