Primary succession results in a new community _____.
Answer: Where there was no vegetation before.
Explanation: The primary succession can be defined as the growth of the pioneer species at a place other than soil.
The substrate for the growth can be lava deposits or rock, mountain deposits that leads to the growth of lichen and algae.
They provide substrate for the growth of plants like ferns, mosses and then to higher plants and trees.
Griffith exposed weak living bacteria to just the fluids from dead virulent bacteria. some of these weak bacteria became virulent and could now kill mice. what control experiment did he do to argue that his weak bacteria changed to virulence in these studies?
The control experiment in Griffith's transformation experiments involved injecting mice with live R strain and heat-killed S strain separately, which demonstrated that neither caused death alone, unlike their combination.
In the context of Griffith's transformation experiments, the control experiment that Griffith conducted to argue that his weak bacteria changed to virulence involved injecting mice with each strain separately before combining them. Initially, Griffith injected mice with the living S strain, causing them to die from pneumonia. Conversely, mice injected with the live R strain survived because this strain was not virulent.
Subsequently, mice were injected with the heat-killed S strain and survived, demonstrating that dead bacteria could not cause pneumonia. The crucial control here proved that neither live R strain nor heat-killed S strain caused death on their own. It was only the combination of live R strain and heat-killed S strain that led to the death of mice. This outcome suggested that a substance from the heat-killed S strain, what Griffith called the 'transforming principle', had transferred to the live R strain, transforming it into a virulent S strain.
All living things are made of one or more cells. Here are two types of cells: an animal cell and a plant cell. Sometimes when plants are under water stress, they wilt. Animals do not wilt! What analogy based on the plant cell structure explains wilting? A) The chloroplast are like a factory. When the plant is water stressed, the chloroplast stops producing energy and the plant wilts. B) The cell wall is like a cardboard box. When the plant is water stressed, the cell wall folds, like someone crushing the cardboard box. C) The large vacuole is like a water-filled balloon. When the plant is water stressed, the water leaves the vacuole and the plant cells start to shrink. D) The plasma membrane is like the drain in your sink. When the plant is water stressed, the plasma membrane stops water from entering the cell and the plant starts to wilt.
A client diagnosed with testicular cancer expresses concerns about fertility. the client and his spouse desire to eventually have a family, and the nurse discusses the option of sperm banking. the nurse should inform the couple that sperm banking would need to be performed:
A client presents to the emergency department with chest pain. on a scale of 1:10 he rates the pain as a 6. his respiratory rate is 22. his blood pressure is 156/92. his heart rate is 110. he is afebrile. what other information should the nurse obtain before administering nitroglycerin?
The body cavity terms of acoelomate, pseudocoelomate and eu (true) coelomate differentiate animals within what category or categories using the older mophological descriptions?
describe how two abiotic factors can move into the trees in a rainforest ecosystem
Final answer:
In a rainforest ecosystem, abiotic factors such as rainfall and temperature help trees absorb water and minerals from the soil, while wind can move soil and water, influencing nutrient availability and water uptake.
Explanation:
The question at hand explores the ways in which abiotic factors like rainfall and temperature can affect the movement of nutrients and elements into the trees within a rainforest ecosystem. Two primary abiotic factors that move into trees are water and minerals. Rainfall, an essential abiotic factor, provides the necessary water for trees through the process of absorption by roots. The water dissolves minerals in the soil, and trees then absorb these mineral-rich solutions. This process is influenced by temperature, which affects the rate of biochemical reactions, contributing to trees' nutrient uptake. Additionally, wind is another abiotic factor that can affect trees by moving soil and water, thus influencing the availability of nutrients and also the rate of evaporation and transpiration from trees, which in turn affects their water uptake.
Hand-passing sharps is a safe practice. Is this statement true or false? A. True B. False
Answer is False.
No, hand-passing sharps is not a safe practice at all. Rather we should use instruments to grasp sharp objects like- needles and scalpels.
Answer: The given statement is false.
Explanation:
To handle sharp objects it is necessary to use an equipment to pick these type of objects. As picking sharp objects directly through hands can cut our hands leading to bleeding or sever cuts into the skin, septic etc.
Hence, we should handle sharp objects carefully in order to avoid any kind of injury.
Hence, the given statement hand-passing sharps is a safe practice, is false.
The ascending portion of the reticular formation ____.
a. is responsible for the eye muscles
b. increases arousal and attention
c. controls the motor areas of the spinal cord
d. controls the motor areas of the brain
The ascending portion of the reticular formation increases arousal and attention. So, the correct option is (B).
What is Reticular Formation?The reticular formation is a complex network of brainstem nuclei and neurons which serves as a major integration and relay center for many important brain systems to coordinate functions necessary for survival.
The reticular formation which represents the archaic core of pathways connecting the spinal cord and the encephalon that supports autonomic, motor, sensory, behavioral, cognitive, and mood-related functions.
It helps coordinate the activity of neurons in these cranial nerve nuclei, so it is involved in the regulation of simple motor behaviors. For example, reticular formation neurons in the medulla facilitate motor activity that is connected to the vagus nerve.
Thus, the ascending portion of the reticular formation increases arousal and attention. So, the correct option is (B).
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Which of the following best describes an advantage of artificial selection?
Can increase the variation in a certain species
Helps produce offspring having desired traits
Helps produce offspring who do not suffer from diseases
Can make species immune to changes in the environment
The statement 'helps produce offspring having desired traits' BEST describes an advantage of artificial selection.
Artificial selection refers to a type of selection made by humans in order to produce pans or animals with desired traits.Artificial selection consists of mating organisms having desired features in order to select offspring that exhibit inherited traits.This process (artificial selection) is well known to reduce the genetic variation in the resulting population as a consequence of selective mating.In conclusion, the statement 'helps produce offspring having desired traits' BEST describes an advantage of artificial selection.
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A patient who has raynaud's disease will begin taking an alpha-adrenergic blocker. the patient asks the nurse how the drug works to treat symptoms. the nurse explains that alpha-adrenergic blockers treat raynaud's disease by causing orthostatic hypotension. reflex tachycardia. decreased peripheral vascular resistance. vasodilation.
Do physical ailments manifest differently in a geriatric patient verses other patient populations? give an example and how the ma would demonstrate professionalism and sensitivity in their communications
Aging decreases immunity level so they have very weak defense against disease.
Further explanation
Geriatric patients
Older patients with chronic illness and physical problem are called geriatric patients.
Common geriatric problems
Some of very common problems are following
Bladder problems
Weight loss
Weak immunity
Depression
Slow metabolism
Osteoporosis
Cognitive health
Malnutrition
Eyesight issues
Geriatrician
Such doctors which is trained or specialized to deal the older patients is called Geriatric physician or Geriatrician. They deal them with proper care. As older people become sensitive, so geriatrician deal them in a very professional way and mostly they discuss the patient’s history with their family members and give them proper instruction about regular checkup, medication and walk to maintain their health.
How to deal elderly patients?
Provide them comfortable environment
Use loud voice and clear language or detailed conservation as they have hearing problems
Listen them with full attention as they speak slowly
Do not interrupt while they are talking
Deal them with love and care
Recommend low dose medicine
Answer details
Subject: Biology
Level: High school
Key words
• Geriatric patients
• Common geriatric problems
• Geriatrician
• How to deal elderly patients?
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the depressant effect of starvation is?
The Depressant effect of starvation is impaired cognitive abilities, anxiety and chronic depression. The lack of nutrient supply and dehydration caused by it are such that thinking abilities are lowered causing irrational behaviors like irritation, aggression and anxiety. Starvation can also induce depression.
which event does not take place during interphase?
a. cellular growth
b. crossing over
c.duplication of chromosomes
d. production of organelles
Which compound is a metabolic intermediate of the light-independent reactions in photosynthesis? a. ATP b.3-PGA c.RuBP d.NADPH
Answer:
The correct answer will be option-B
Explanation:
The light-independent reaction of the photosynthesis is also known as the Calvin cycle. The Calvin cycle is a cyclic set of reactions which generates the 6 carbon glucose molecule from the carbon dioxide and other molecules.
The cycle forms two molecules of three-carbon compounds called 3-phosphoglycerate or 3-PGA. The 3-PGA gets converted to another three-carbon compound called G3P. The conversion of 3-PGA to G3P gains energy from the ATP and NADPH produced from the light reaction of the photosynthesis.
Thus, Option-B is the correct answer.
When the nurse researcher conducts an electronic literature search, the search yields more than 7000 citations for the topic. the researcher should make which of these interpretations of the finding?
Nora who is pregnant awakens at 2 am craving pickles
Answer:
yum?
Explanation:
Which of these carbohydrates is not broken down by our bodies? glycogen amylose fiber amylopectin?
Several cities have now banned __________, which are a type of fat.
Several cities have banned trans fats, which are a type of fat known to increase the risk of coronary heart disease.
Cities have banned trans fats due to their link to higher levels of 'bad' cholesterol and heart disease. Following actions by states like California and the FDA, there has been a significant reduction in trans fats in the food supply by 2021.
Trans fats, or trans-unsaturated fatty acids, are not commonly found in nature but are industrially created for use in products like margarine, certain types of peanut butter, and shortening. These artificially hydrogenated trans fats contribute to higher levels of low-density lipoproteins (LDL), or 'bad' cholesterol, leading to arterial plaque and heart disease. In response, regulatory actions, such as those by the FDA and various bans in certain locales, have limited their presence in the food supply.
Beginning with California in 2010, trans fats have been phased out from restaurants and retail baked goods due to their health risks. The FDA has also taken action, determining that trans fats are not safe and mandating their elimination from the U.S. food supply by 2021. Eventual compliance by food manufacturers and restaurants to these rulings and bans reflects the significant shift away from using trans fats due to their association with adverse health effects.
Which of the following best summarizes how hormone levels are controlled?
Answer:
its a feedback loop i am doing the test right now and i have my notes and its right
Explanation:
i have it on my test it is right
!!!
A ______ is a stem growing from a plant that periodically produces new stems and leaves on one side and roots on the other.
a)mitospore
b)rhizome
c)multiple fussion
d)stolon
Although a star might look brighter than the Sun, a comparison of its ______________ magnitude might help prove that they have the same real brightness.
Answer:
Although a star might look brighter than the Sun, a comparison of its Absolute magnitude might help prove that they have the same real brightness.
Explanation:
Apparent magnitude measures the brightness of a celestial body from the Earth at its actual position.
Absolute magnitude is the apparent magnitude of the same body when it is at a distance of 10 parsecs.
A star might look brighter than the sun but actual comparison of the brightness can be done by comparing the absolute magnitudes of the two stars.
The earth's atmosphere is made up of _______, ________, and trace elements. A) carbon, oxygen B) oxygen, silicon C) hydrogen, oxygen D) nitrogen, oxygen
Answer:
The answer is D)Nitrogen, and oxygen
Explanation:
The earth's atmosphere is made up of nitrogen, oxygen, and trace elements, which are in Option D, as the atmosphere is composed of a mixture of gases, with nitrogen and oxygen present in major amounts.
What is the significance of the atmospheric gas?Earth's atmosphere is composed of a mixture of gases, such as nitrogen, which makes up approximately 78%, and oxygen, which makes up approximately 21%, and these gases play important roles in supporting life on the planet as they help to regulate the temperature and provide a source of nitrogen for plants and animals.
Hence, the earth's atmosphere is made up of nitrogen, oxygen, and trace elements, which are in Option D, as the atmosphere is composed of a mixture of gases, with nitrogen and oxygen present in major amounts.
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which microscope is best used to see the organisms in a drop of pond water
Longshore drift _____. is caused by wind erosion happens along the coastline is a type of mass wasting can be reduced by creating windbreaks
Answer:
happens along the coastline.
Explanation:
Longshore drift is a geological process that causes sediment transport along the Earth's crust by the prevailing oblique winds. With this we can say that the longshore drift happens along the coast line. These winds generate an air stream parallel to the crust line moving the sediments. This process is also known as coastal drift.
why does many children have the same phenotypic characteristics as their parents?
In the snail cepaea nemoralis, an autosomal allele causing a banded shell, u, is recessive to the allele for an unbanded shell, u. genes at a different locus determine the background color of the shell. the allele for a yellow shell, b, is recessive to the allele for a brown shell,
b. a banded, yellow snail is crossed with a homozygous brown, unbanded snail. the f1 progeny are then crossed with banded, yellow snails in a testcross. predict the percentage of progeny in each phenotype if the two genes are linked with no recombination, if the two genes assort independently, and if the genes are 20 m.u. apart. place the percentage for each phenotype for each of the scenarios in the table below. percentages can be used more than once.
The predicted phenotypes differ based on whether the genes are linked with no recombination, assort independently, or are 20 m.u. apart. With no recombination, there will be 50% banded brown and 50% banded yellow progeny. Independent assortment or 20 m.u. apart genes result in a 25% and 40%-10% split among the four possible phenotypes, respectively.
To predict the phenotypes of the progeny in the given scenarios, we need to understand the genetics behind the snail's traits. The banded shell allele 'u' is recessive to unbanded 'U', and the yellow shell allele 'b' is recessive to brown 'B'. In the initial cross of a banded yellow snail (uubb) with a homozygous brown unbanded snail (UUBB), all F1 progeny will be UuBb (banded brown), as each allele is incompletely dominant over its counterpart.
For the testcross of F1 progeny with banded yellow snails, if the two genes are linked with no recombination, all progeny will display the parent phenotypes, since the alleles are inherited together. This would mean 50% banded brown and 50% banded yellow. If the genes assort independently, we would expect a phenotypic ratio of 1:1:1:1, following Mendel's law of independent assortment, resulting in 25% of each possible phenotype. When the genes are 20 map units (m.u.) apart, implying a 20% recombination rate, the expected phenotypes will be: 40% banded brown, 40% banded yellow, 10% unbanded brown, and 10% unbanded yellow.
There are at least two things related to barb's medical history that may be of interest to a doctor. what are those two things? answer
The two things that the doctor may be of interest to barb’s medical history is her hip replacement procedure and her asthma. Although her hip replacement procedure was done long ago but she should still be cautious on her movements especially carrying her grandchildren or bringing heavy load. Moreover, her asthma attack must also be carefully monitored particularly her labored breathing pattern.
All diabetic patients with hyperlipidemia should be treated with:
Imagine that two researchers independently carry out clinical trials to test the same null hypothesis, that cox-2 selective inhibitors (which are used to treat arthritis) have no effect on the risk of cardiac arrest. they use the same population for their study, but one experimenter uses a sample size of 60, and the other uses a sample size of 100. assume that all other aspects of the studies, including significance levels are the same between the two studies. which study has higher power?