Answer:
The cosmological principle makes assumptions that provide scientific guidelines to enable its study. Mr. Biggins believes that the universe has been and always will look and be structured the same throughout all time.
Explanation:
The cosmological principle makes assumptions that provide scientific guidelines to enable its study. Mr. Biggins believes that the universe has been and always will look and be structured the same throughout all time.
Parkinson disease is associated with demyelination of CNS neurons. a pyramidal nerve tract lesion. insufficient production of acetylcholine in the basal ganglia. a deficiency of dopamine in the substantia nigra.
Answer:
The correct option is: a deficiency of dopamine in the substantia nigra.
Explanation:
The substantia nigra is the principal site involved in the physiopathology of Parkinson´s disease.
Cells from this area degenerate and die progressively causing important degeneration in the central nervous system. The cells that die -with no known reason- are those that produce dopamine and proportionate dopaminergic innervation to the encephalon. In fact, almost all the symptoms exhibited by patients with the disease can be explained by the lack of dopamine in the substantia nigra.
This area uses the neurotransmitter to communicate neurons from the base ganglia. Ganglia are responsible of modulating and modifying movements.
The nigrostriatal system participates in planning and automatic execution of learned movements. When the ganglia activity decreases, so it does the amount and velocity of movements, something typical of the disease.
Results from Gregor Mendel's dihybrid crosses supported gene linkage.
a. True
b. False
Answer:
True.
Explanation:
Results from Gregor Mendel's dihybrid crosses supported gene linkage because the segregation of alleles or into gametes can have an effect on gene linkage where gene that are closely located to each other are.
The main purpose of Mendel's dihybrid cross The purpose of the dihybrid cross was to determine if there is any relationship that exist between different allelic pairs.
A dihybrid cross is a cross that existed between two parents that have two different pairs of alleles .
Example is AABB x aabb.
Which of the following is an example of statistical interference?
A. having a sample size that is too large
B. calculation errors
C. selecting one demographic for surveying
D. selecting a representation of a population and translating it to a larger group
Answer:
D). Selecting a representation of a population and translating it to a larger group.
Explanation:
Statistical inference is described as the method of employing data analysis to draw conclusions about the characteristics/properties of a population on the basis of a casual sample collected from the population. Such a method is primarily employed to learn the characteristics of a large population size.
As per the question, 'selecting a representation of a population and translating it to a larger group' would exemplify statistical inference as a sample is collected as a representation of the population for learning the characteristics and applying it to the entire group. Thus, option D is the correct answer.
The plant species Arabidopsis thaliana has a genome containing approximately 135 million bp of DNA. For this problem, assume Arabidopsis has a core-DNA length of 145 bp and a linker-DNA length of 55 bp.
Determine the approximate number of nucleosome in each nucleus. Determine approximately how many molecules of histone protein H4 are found in each nucleus.
Answer:
700,000 nucleosomes and 1,400,000 H4 proteins
Explanation:
Number of base pairs for each nucleosome: 145 bp (core-DNA length) + 55 bp (linker-DNA length) = 200 bp
Genome size = 135 million bp of DNA = 135,000,000 bp >>
>> Number of nucleosomes in each nucleus = 135,000,000 / 200 = 700,000 nucleosomes
A nucleosome is composed of two copies of the H2A, H2B, H3, and H4 core histone proteins. In consequence, a nucleosome contains 2 two copies of the H4 histone protein >>
>> Number of H4 in each nucleus = 700,000 nucleosomes x 2 = 1,400,000 H4 proteins
Which statement is true about the development of the modern computer?
Answer:
C) Scientists who have developed computers were improving on the work of scientists before them.
Vibrio cholera is a bacterium that causes the diarrheal disease known as cholera. In the 1800s
Louis Pasteur noticed that old Vibrio cholera cells did not cause disease in chickens, whereas new
V. cholera cells did cause disease. He also noticed that chickens previously inoculated with old
cells could not be made sick by new V. cholera cells. Based on Pasteur's observations, which of the
following represents a good hypothesis?
Answer:
''If the old cells inoculated in chicken, it produces resistance in the chicken against new V. cholera cells.''
Explanation:
From the data provided by Louis Pasteur, we make a hypothesis i. e. ''If the old cells inoculated in chicken, it produces resistance in the chicken against new V. cholera cells.'' From these observation we can assume that by allowing old V. cholera cells to chicken, it did not cause any disease but make immunity against the new V. cholera cells which are more effective from old V. cholera cells.
How many of the highlighted type of tooth would be found in permanent dentition? How many of the highlighted type of tooth would be found in permanent dentition? four eight six twelve
Answer:
Explanation below.
Explanation:
The question is actually not complete. But this is my response to it.
Generally, dentition can be defined as the arrangement and conformation of teeth in the mouth. And it has two types which are
Temporary dentition and permanent dentition.
In this sense, the total number of teeth in the mouth of Man is 32. And this can be divided into two as
16 teeth in each maxillary and mandible.
Each section of the 16 teeth comprises of 2 central incisors, 2 lateral incisors, 2 canines, 4 premolars and 6 molars.
what source is ketchup
Answer:
condoment
Explanation:
i found this because this is something you put on yoir burger or fries
You can poach fish in _______ or pots of various sizes.
Answer:
you can poach fish in large pan or pots of various sizes
Explanation:
hope this helps you.
What will happen if the number of snakes goes down?
Answer: The population of animals that they feed on will grow.
Which of the following suggests that humans have reached our carrying capacity? Humans are unable to increase food production to sustain a larger population. Human predators are drastically reducing population size. Humans' use of resources in general is greater than resource availability. There is no evidence that humans have reached carrying capacity. Humans have exhausted available space.
Answer:
The human population is yet to reach its carrying capacity. However, the following will suggest that humans have reached their carrying capacity.
1. When humans are unable to increase food production which is expected to sustain a larger population.
2. When humans' use of resources, in general, is greater than resource availability.
Explanation:
The human population is yet to reach its carrying capacity. However, the following will suggest that humans have reached their carrying capacity.
1. When humans are unable to increase food production which is expected to sustain a larger population.
2. When humans' use of resources, in general, is greater than resource availability.
why do muscles pull but not push
Explanation:
Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint. Then, when the movement is completed, the flexor relaxes and the extensor contracts to extend or straighten the limb at the same joint.
Answer:
the muscles are designed to only contract
Explanation:
the muscles would not be able to pull if the two protein molecules are not present.
how is the earth oriented to the sun
Answer:
the orientation of Earth's tilt with respect to the sun – our source of light and warmth – does change as we orbit the sun. In other words, the Northern Hemisphere is oriented toward the sun for half of the year and away from the sun for the other half.
Explanation:
Describe the levels of organization
amongst living things
The enzyme lactase will break down milk sugar, called lactose, into
glucose and galactose. Glucose and galactose are examples of which of
the following?
O amino acids
O phospholipids
O steroids
O monosaccharides
Answer: Monosaccharides
Mono saccharides are the sugar molecules in which only single sugar compound is present. The correct answer is option D that is monosaccharides.
What is the simplest form of sugar present in abundance ?Glucose is the abundant form of sugar present in the nature.
Lactose is the milk sugar which is broken down by the enzyme called as lactase into two of the monosaccharide units called as glucose and the galactose. The process is called as digestion in which the complex substances are broken down into the simpler compounds for the sake of digestion.
Amino acids are the bio compounds in which they are both containing amine and the carboxylic acids which are later forms proteins and the peptides together form the proteinaceous structures.
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3. What is the function of nucleic acids to living things?
How many ATP would ultimately be generated from the complete oxidation of an 18 carbon stearoyl-CoA?
Answer:
90 Atp
Explanation:
Stearyol co A is an enzyme that is responsible for fatty acid metabolism. This take place in the presence of oxygen.
Complete oxidation of stearyol co A break into 9 acetyl co A which through kreb cycle and electron transport chain produced 90 ATP.
When measuring wellness, you must consider
А. all components of health
B. your physical fitness being in the top 10% of the population
C. being free of diseases
D. both physical and mental health
A jaguar that eats its prey and then bounds across the rainforest after another possible meal is representing the characteristics of obtaining and using energy?
True or False
Answer:
the above statement is correct True. He obtains energy then uses it to get more.
Explanation:
hope this will help you :)
How many grams are in 1 mole of lithium
Answer:
6.941 grams
Explanation:
We assume you are converting between moles Lithium and gram.
The following statements summarizes the results of an experiment related to exocytosis or endocytosis. In this case, explain the relevance of the experiment and its result to our understanding of these processes. Addition of the drug colchicine to cultured fibroblast cells inhibits movement of transport vesicles. 1. Colchicine is a drug that prevents intermediate filament assembly, thereby disrupting intermediate filaments-based functions 2. Colchicine is a drug that prevents endocytosis, thereby disrupting phagocytic functions. 3. Colchicine is a drug that prevents microfilament assembly, thereby disrupting microfilament-based functions 4. Colchicine is a drug that prevents microtubule assembly, thereby disrupting microtubule-based functions.
Answer: 4. Colchicine is a drug that prevents microtubule assembly, thereby disrupting microtubule-based functions.
Explanation:
Endocytosis can be defined as trapping of a substance from outside of the cell. Exocytosis can be defined as the process of fusion of the vesicles with the plasma membrane and excreting their contents outside the cell.
Colchicine is a drug that blocks the polymerization of microtubules in the cytoskeleton. This further prevents the transportation of vesicles out of the cell and in the cell. Thus this will prevent the exocytosis and endocytosis of the transport vesicles and will affect cellular metabolism.
Which of the following is not termed as hybridization? a) DNA & cDNA b) DNA & mRNA c) DNA from different species d) DNA from male & female of same species.
Answer:
DNA from male & female of same species
Explanation:
According to base-pairing rules, adenine (A) always bonds to thymine (T) or Uracil (U), while guanine (G) always bonds to cytosine (C). Nucleic acid hybridization is a process produced by base-pairing complementary between two different DNA (or DNA and RNA) single-stranded molecules to give a hybrid double helix. In consequence, and since hybridization involves base-pairing from different sources, the pairing between DNA strands belonging to male and female of the same species is not considered as a process of hybridization.
According to the Fujita Tornado Intensity Scale, a category F5 tornado,has what range of wind speeds?
a. 113–157 miles per hour
b. 261-318 miles per hour
c. 207-260 miles per hour
d. 40-72 miles per hour
Answer:
Hi! The answer is B.) 261 to 318 mph.
Explanation:
The Fujita scale classifies tornadoes according to the damage they cause. Almost half of all tornadoes fall into the F1 or “moderate damage” category. These tornadoes reach speeds of 73-112 mph and can overturn automobiles and mobile homes, rip off the roofs of houses, and uproot trees.
Only about one percent of tornadoes are classified as F5, causing “incredible damage”. With wind speeds in excess of 261 mph, these tornadoes are capable of lifting houses off their foundations and hurling them considerable distances.
Why did the brown tree snake population on Guam increase unchecked
Answer:
In the last 60 years, brown tree snakes have become the embodiment of the bad things that can happen when invasive species are introduced in places where they have few predators. Unchecked for many years, the snakes caused the extinction of nearly every native bird species on the Pacific island of Guam.
Living organisms break down polysaccharides into
a) simple sugars
b) complex monomers
c) complex Carbohydrates
d) simple polymers
Alkaline is another name for what solution
Answer:
water
Explanation:
Answer:
it's another name for a basic solution.
Explanation:
Any alkaline solution has a pH that is higher than 7, therefore making it basic.
A region generally is higher than an adjacent region if ____________ than in the adjacent region.
Cells are the basic units of llfe. Viruses differ from cells in many key ways. Which of the
following is true?
A. Cells contain organelles, whereas viruses do not contain organelles.
B. Cells cannot maintain homeostasis, whereas viruses can maintain homeostasis.
C. Cells contain nucleic acids, whereas viruses do not contain nuclelc aolds.
D. Cells do not contain ribosomes, whereas viruses do contain ribosomes.
Answer:
A
Explanation:
Viruses don't contain organelles.
The statement which is true with respect to the cell and viruses is as follows:
Cells contain organelles, whereas viruses do not contain organelles.Thus, the correct option for this question is A.
What is a Cell?A Cell may be defined as the basis structural and functional unit of life. All living organisms are made up of cells. Cells are required for organisms in order to accomplish their metabolic activities, growth, development, etc.
Most living cell significantly consists of cell organelles except for bacteria. Viruses are non-cellular. So, these do not have organelles. Viruses simply utilize the host machinery in order to multiple and reproduce.
Therefore, cells contain cell organelles while viruses do not contain organelles because they lack cells. Thus, the correct option for this question is A.
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Alleles A and a reside at a locus on the same chromosome as a locus with alleles B and b. Aa Bb is crossed with aa bb and the following progeny are produced: Aa Bb 5 Aa bb 45 aa Bb 45 aa bb 5 What conclusion can be drawn about the arrangement of the genes on the chromosome in the Aa Bb parent
Answer:
The two genes are linked together
Explanation:
The conclusion that can be drawn about the arrangement of the genes on the chromosome in the Aa Bb parent is that the two genes are linked together. That is, they do not assort independently.
When two genes are linked together, the number of recombinant offspring would be more than the number of offspring with parental traits. The frequency of recombination would also not exceed 50%.
Recombination frequency = number of recombinant offspring/total number of offspring x 100%
Number of recombinant offspring = 45 + 45 = 90
Total number of offspring = 45 + 45 + 5 + 5 = 100
Recombination frequency = 90/100 x 100% = 10%
Hence, the two genes Aa and Bb are said to be linked together.
In an experiment, heat is added to a liquid at a constant rate of 10 degrees Celsius per minute. If the starting temperature is 25 degrees Celsius, what will the temperature of the liquid be after 5 minutes? Give your answer in degrees Celsius.
Answer:
75 degrees
Explanation:
The start up temperature is 25 degrees and every 1 minute it increases by 10 degrees, in 5 minutes (10*5) equals 50degrees plus start up temperature of 25 degrees equals 75 degrees