The ancestors of plants are most likely plant-like protists, which are small, unicellular, aquatic eukaryotes capable of photosynthesis. These organisms gave rise to land plants about 475 million years ago. The first land plants were simple and did not contain vascular tissue. This meant that they were not able to move food and water from one part of their structure to another. Examples of these nonvascular plants are seen in liverworts, hornworts, and mosses. All three groups are small, simple, and must live in moist environments.
The third major evolutionary development in plants occurred around 360 million years ago. Plants developed seeds. These seeds are used for reproduction and provide several advantages over plants that do not have seeds, including the ability for offspring to travel far distances from their parents, protection from the elements, and the ability to remain dormant until the time is just right to grow. Examples of plants that produce seeds are conifers, daffodils, and apple trees.
Around 420 million years ago, a great advance in plant structure evolved - vascular tissues. The two types of vascular tissue - xylem and phloem - move water and food throughout plants. This development allowed plants to expand where they could live - they no longer needed to be in only moist environments. It also allowed them to grow bigger. This adaptation was so advantageous that more than 90% of all plant species are vascular. Examples of vascular plants include ferns and horsetail.
Answer:
Coagulation begins almost instantly after an injury to the endothelium lining a blood vessel. Exposure of blood to the subendothelial space initiates two processes: changes in platelets, and the exposure of subendothelial tissue factor to plasma factor VII, which ultimately leads to cross-linked fibrin formation.
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Answer:
the food web
Explanation: A food web is a conceptual model that represents the flow of energy through an ecosystem.
The correct answer is Naltrexone.
Disease: Kleptomania & Symptoms
It is an unusual condition disorder in which a person has an urge to steal the things even if they don't need it. This is a type of impulsive disorder which is characterized by repeating and continuous patterns of stealing.
Treatment
Naltrexone is a drug that cures this disease, this drug blocks the effect of endogenous opitates that may be released during stealing. In layman language one can say that it blocks that part of he brain which feels pleasure with some of the addictive behaviors. It was found that after eight weeks of treatment by this medicine, the urge to steal things was reduced.
The question is incomplete, the complete question is:
A client with myasthenia gravis improves and is discharged from the hospital. The discharge medications include pyridostigmine bromide (Mestinon) 10 mg every six hours. The nurse evaluates that the drug regimen is understood when the client says, "I should:
1
Take the medication on an empty stomach."
2
Set an alarm so I take the medication on time."
3
Take my pulse rate before taking the medication."
4
Monitor for an increase in blood pressure after taking the medication."
Answer:
The correct answer is statement 2.
Explanation:
Pyridostigmine refers to an essential drug, which must be consumed on time, as a late or missed dose can lead to extreme neuromuscular and respiratory consequences or even death. Pyridostigmine should be consumed with a small concentration of food in order to inhibit gastric irritation.
It is not essential to take the pulse rate prior to taking the medication. Pyridostigmine may result in hypotension, however, not hypertension, which is not an indication of cholinergic crisis.
