“The mechanism that the kidneys use to concentrate urine is called the counter current mechanism.”
Which point in this graph shows the beginning of a period of exponential
growth?
С
Population size-
B
Time
O A. Point C
ОО
B. Point D
C. Point B
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Answer:
C. Point B
Explanation:
The exposed curve represents a logistic growth model. Population growth depends on density. Natality and mortality depend on the population size, meaning that there is no independence between population growth and population density.
When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate. The population per capita growth rate decreases as population size increases. The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.
K is a constant that equals population size at the equilibrium point, in which the natality and the mortality rate get qual to each other.
Referring to population size as N, when
N<K, the population can still grow. N approximates to K, the population´s growth speed decreases. N=K the population reaches equilibrium, N>K, the population must decrease in size because there are not enough resources to maintain that size.The sigmoid curve represents the logistic growth model.
Point A: During this period, the population size is relatively stable. Little growth is expressed. Point B: At the beginning of this period, population growth increases softly. The more individuals are in the population, the more that reaches sexual maturity and get to reproduce, leaving fertile offspring. This fertile offspring also get to reproduce and leave more fertile individuals. At the end of the period, the curve shows a sharp slope, reflecting the significant increase in the population reproductive rate. Point C: At the beginning of this period, the population keeps on growing exponentially. But at the end of the period, the curve tends to stabilize, meaning that the population stops growing in size so fast. The population slow and gradually reaches the equilibrium point, K.Point D: The population got to stabilize.Answer:
POINT A
Explanation:
Just took the test :)
Describe one way osmosis and osmotic pressure is important to medicine.
Answer:
Since the beginning of life of the first multicellular organisms, the preservation of a physiologic milieu for every cell in the organism has been a critical requirement. A particular range of osmolality of the body fluids is essential for the maintenance of cell volume. In humans the stability of electrolyte concentrations and their resulting osmolality in the body fluids is the consequence of complex interactions between cell membrane functions, hormonal control, thirst, and controlled kidney excretion of fluid and solutes. Knowledge of these mechanisms, of the biochemical principles of osmolality, and of the relevant situations occurring in disease is of importance to every physician. This comprehensive review summarizes the major facts on osmolality, its relation to electrolytes and other solutes, and its relevance in physiology and in disease states with a focus on dialysis-related considerations.
__________ always pairs with _________.
Answer:
Adenine and Thymine, Cytosine and Guanine?
Explanation:
Answer:
I always pairs with my best friend
Explanation:
Mode of action of aldehydes and Quaternary ammonium compounds is
Answer:
Aldehydes have antibacterial, antifungal, antiviral and sporicidal activity. These are helpful to destroy the spores of Bacillus subtilis and Clostridium sporogenes. Glutaraldehyde and formaldehyde are commonly used aldehydes in disinfectants.
Quaternary ammonium compounds work by denaturing the proteins of the bacterial or fungal cell, affecting the metabolic reactions of the cell and causing vital substances to leak out of the cell, causing death.
1. What are the different modes of nutrition observed in plants? Give examples of each.
2. Why is cuscuta categorized as a parasite?
3. What are lichens? Give examples.
1. Parasitic nutrition, Saphrophtic noutrition
parasitic: cuscuta
saprophytuc : rhizopus
2. Cuscuta is categorised as parasite because It obtains it's food through the host plant.
3. Lichens are groups of fungi and Algae.
Answer:
Explanation: 1 Ans) the different modes of nutrition observed in plants are parasitic nutrition and saprozoic nutrition. Egs: Scandal plant and Yeast respectively.
2 Ans) Cuscuta is categorized as a parasite because it obtains nutrients from the main plant.
3 Ans) Lichens are the symbiotic Relation of algae and Fungi. Eg: Bread Lichen.
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What is the new mRNA strand formed by this gene?
TAG CTT GGC AT
species separated by inability of hybrid offspring to produce offspring of their own
Reactive oxygen species (ROS) are unstable, or reactive, compounds that result from the partial reduction of oxygen. ROS can cause damage to molecules, including membrane lipids and nucleic acids, and may be associated with some diseases. Which of these compounds are reactive oxygen species
Answer:
OH, H2O2 and O−2
Explanation:
Reactive oxygen species (ROS) can be defined as highly reactive chemical compounds formed from molecular oxygen (O2). ROS are generated as a normal product of cellular metabolism, and also as a response to different environmental/internal cellular stimuli (e.g., cytokines, xenobiotics, pathogenic invasion). For example, hydroxyl radicals (·OH) are a type of ROS generated in the mitochondria which are capable of inducing oxidative stress in different cells and also trigger chronic inflammation. Moreover, hydrogen peroxide (H2O2) molecules represent another type of ROS which are produced during the stereoselective deamination of amino acids, i.e., the building blocks of proteins. These molecules (H2O2) exhibit toxic effects on the cell (e.g., DNA damage). Finally, singlet oxygen (1O2) is an excited state of molecular oxygen (O2) that is generated during photosynthesis in the photosystem II (PSII) of chloroplasts.
An ____________ is one of multiple forms of a gene. Each variation of a gene has a different sequence of ____________ , which are the building blocks of DNA.
Answer:
Bom se tu falasse do que ta falando
Explanation:
Egg fertilization happens in the?
What are the two uses of legume forage crops in Ethiopa?
Answer:
1.supply of better
quqlity food for animals
२.recovering and improving soil nutrients
Explanation:
by providing nitrogen fixing bacteria
Which of these organelles prepares proteins to be fully functional?
A. Rough endoplasmic reticulum
B. Large vacuoles
C. Smooth endoplasmic reticulum
D. Chloroplasts
Rough endoplasmic reticulum
Answer:
Rough endoplasmic reticulum is among the organelles that are found in eukaryotic cells. The reason as to why it is called rough is because it has ribosomes attached to its surface. Its main function is to produce proteins.
Explanation:
Which of the following can be used to predict volcanic eruptions?
A. Increased speed of movement in mantle convection cells
B. Cooling water temperatures
C. Increased sulfur dioxide emissions
D. Continental crust begins to slide under oceanic crust
Answer:
D
Explanation:
What is limiting factor
Answer:
limiting factors are often referred as a lack of a particular resource .
Look at the diagram below.
Х
Which best describes the structure labeled X in the diagram?
Answer:
C
Explanation:
Its transfer element through it channel
the development of the horse in the fossil record shows
Answer:
The evolution of the horse may be seen in the fossil record. The horse walked in a straight line. The horse grew from the size of a little dog to the bigger horse of today. Mules were the forerunners of the modern horse. Bears were previously linked to contemporary horses.
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What is the answer with explaining
Answer:
All EeWw (100%)
Explanation:
This question involves two genes; one coding for earlobes and the other for hairline. According to the question, one parent is homzygous recessive for earlobe but homzygous dominant for hairline i.e. (eeWW) while the other parent is homzygous dominant for earlobe but homzygous recessive for hairline i.e. (EEww).
The cross between the two parents is as follows: eeWW × EEww. The following gamete combination will be produced by each parent:
eeWW - eW, eW, eW, eW
EEww - Ew, Ew, Ew, Ew
Using this gametes in a punnet square, the following proportion of offsprings will likely be produced:
All EeWw
In which of the scientific classifications are all the
animals grouped
If the stomata remain closed due to water loss, what happens to the concentration of CO2 and O2 in the leaf
Answer:
Fixation of oxygen occur instead of carbondioxide.
Explanation:
If the stomata remain closed due to water loss, the concentration of carbondioxide decreases and oxygen increases in the leaf because of the fixation of oxygen instead of carbondioxide by rubisco. The plant takes carbondioxide from the atmosphere when the stomata is open so when the stomata is closed there is no other way for getting carbondioxide into the leave so the oxygen is now being fixed by our rubisco enzyme to that five-carbon compound instead of carbon dioxide.
What is fossilized evidence of pollen most likely to reveal? 1a) whether the area was warm, swampy, grassy, or wooded
2a) whether the area was inhabited by people
3a) whether the area was inhabited by many animals
4a) whether dinosaurs lived in the area
The most direct method by which an ion or molecule can move across a cell membrane is by ____________.A. using an integral protein.B. a sodium-potassium pump.C. simple diffusion. D. active transport.E. osmosis.
Answer:
C. Simple diffusion
Explanation:
Simple diffusion from a high to low concentration is the most direct method that ions or molecules can move across a cell membrane.
Through this method, no proteins are required for transport, and no energy is used.
The ion or molecule being transported directly moves across the cell membrane, without any other factors involved.
So, the correct answer is C. Simple diffusion
Give the reason for carrying out the following procedures when preparing wet mounts of plant to 1.) Making very thin sections.
Answer:
we should not cut .we should crop .we should give water
4: a. Explain the term female sterilization
Explanation:
Female sterilisation can be seen as an operation to permanently prevent pregnancy. sterilization for women is a procedure that blocks the fallopian tubes so that eggs do not reach the uterus. Many people call it getting your tubes tied. Doctors may call it tubal ligation or tubal occlusion. This is a permanent form of birth control.The fallopian tubes are blocked or sealed to prevent the eggs reaching the sperm and becoming fertilised.
Based on the dolphins, (mammals of the ocean), why
is it recommended that women who are going to
become pregnant, are pregnant, are nursing and/or
young children, not eat seafood and shellfish in large
quantities or more than 1x per week?
Answer:
Raw shellfish may be contaminated with harmful bacteria and viruses, and therefore carries a higher risk of food poisoning.
Explanation:
You’re naturally more susceptible to food poisoning during pregnancy because of changes to your metabolism and circulation, and as well as being unpleasant for you, food poisoning can increase the risk of premature delivery and infections in your baby
When an artery gets a constricted region due to plaque, how does the pressure in this region compare to the pressure in an unconstricted region adjacent
Answer:
Pressure increases.
Explanation:
When an artery gets a constricted region due to plaque, the pressure in this region increases as compared to the pressure in an un-constricted region where the pressure is normal because in the non-constricted region there is no narrow artery and the blood flows normally. When the artery becomes narrow due to deposition of any materials, the blood pressure increases so that's why we can say that the pressure increases in the artery in constricted region.
A constricted region in an artery will cause blood to flow with more pressure as compared to unconstricted regions.
Remember that pressure is the ratio of force and area.
Mathematically; Pressure = Force/Area.
This means that the higher the area, the lower the pressure and vice versa granted that the force remains constant.
A constriction in an artery due to plaque will reduce the area of the artery through which blood flows. Thus, the blood in this area will flow with more pressure compared to the unconstricted regions on the same artery.
More on pressure and areas can be found here: https://brainly.com/question/3967722?referrer=searchResults
What form of government is the US federal government?
Answer:
democratic republic
Explanation:
A certain animal species has either curly tails (C) or straight tails (c) and either hazel eyes (H) or blue eyes ( h). What are the possible genotypes of an animal with curly tails and blue eyes
Answer:
CChh
Cchh
Explanation:
Cc or CC can be a genotype for curly tails because both have a dominant allele for curly tails
hh can be a genotype for blue eyes because there are two recessive alleles for blue eyes that are present
Three color receptors that responded in an opponent-process fashion had been proposed by ______; this arrangement was later verified by ______ in monkeys.
This question seems to be incomplete. However, there is enough information to find the right answer.
Answer:
Three color receptors that responded in an opponent-process fashion had been proposed by Hurvich and Jameson; this arrangement was later verified by DeValois in monkeys.
Explanation:
In "An opponent-process theory of color vision" (1957), Hurvich and Jameson developed the opponent-color system. In "Color Vision Mechanisms in the Monkey" (1960), De Valois confirmed the existence in monkeys of color-opponent ganglion cells in the retina and color-opponent cells in the lateral geniculate nucleus of the thalamus. De Valois himself states in his research that there´s a clear close parallel between the behavior of what he calls "on-or-off cells" and the findings o Hurvich and Jameson.
Explain the role of cellular respiration in a cell.
Answer:
Every cell performs a type of cellular respiration as it is required to produce energy. The point of cellular respiration is to turn high-energy molecules, know as glucose, into ATP, a form of usable energy. There are two types of respiration, aerobic and anaerobic. Aerobic goes through 3 stages and produces the most ATP by using oxygen and releasing carbon dioxide. Anaerobic does the same job but only uses one stage and produces much less ATP. This process gives the cell energy and continues the carbon cycle.
Write down Gibbs energy equation and indicate which one is change in enthalpy
