Answer:
a. The solution in the bag would turn purple as the iodine reacts with the starch.
Explanation:
According to this question, a solution containing starch is placed into a securely tied dialysis bag. The dialysis bag is then placed into a breaker containing distilled water and iodine for 30mins.
The starch is a solute substance, which when added to the solution in the dialysis bag makes the solution in the bag HYPERTONIC in comparison to the hypotonic (low solute concentration) distilled water+iodine in the beaker. Based on this concentration gradient (difference in concentration), osmotic flow will occur across the dialysis bag (semi-permeable membrane).
Note that, osmosis is the movement of water from a region of low solute concentration to a region of high solute concentration across a membrane. Hence, water+iodine from the breaker will move into the solution in the dialysis bag.
Because the solution entering the dialysis bag contain iodine, it will react with the starch content of the dialysis bag and form a dark purple coloration inside the dialysis bag.
Select the correct answer. Which compound is inorganic?
Answer:
B
KH2PO4
Explanation:
Answer:
B. KH2PO4
Explanation:
Answer correct from plato
As biochemistry has matured as a science, new branches of the field have developed to maintain the ever-growing database of information. Assign the purpose on the right with the field on the left. A) bioinformatics 1) assess the expression and function of genes B) proteomics 2) determine the intracellular concentrations of small molecules C) metabolomics 3) mathematic analysis of DNA sequence data D) genomics 4) identify the function of proteins
Answer:
A:3, B:4, C:2, D:1:
Compare your observations of micrographs obtained from the optical microscope,the scanning electron microscope, and the transmission electron microscope
Answer:
optical microscope uses visible light and a lense to generate magnification
scanning electron microscope prodces image of a sample scanning with a focused beam of electron
transmission electron microscope in which beam of light of electrins is transmitted through a specimen to form an image
Compare three components of inhaled air with that of exhaled air
Answer:
These are oxygen,Carbon dioxide and water vapour.
Explanation:
The inhaled air has 21% oxygen,0.04% C02,and less water vapour.
Exhaled air contains more C02-4%, 16%-O2 and more water vapour about 6.3%.
The higher 02 of the inhaled air is needed for the supply of lung tissues for the respiration of the cells.Therefore higher volumes is needed to meet up with the larger demands by the cells. The oxygen is needed for cellular respiration which leads to production of more C02 and water vapour in exhaled air.
Therefore, their elevated levels(C02-4%) in exhaled air is due to this mechanisms.This made the exhaled air to be saturated with water vapour
They are the wastes products of cellular respiration in animals. (however the volume of the oxygen in the exhaled air drops to 16% from 21%)because it is used as fuel to burn glucose).
Th volume of C02 in the inhaled air is low because this is not needed for cellular respiration,this it volume of (0.4) compared to the inhaled air.
Generally, the lower levels of C02 is needed so that the diffusion gradients for the movement of C02 out of the lungs is achieved . Hence waste gasses are not retained in the body. Likewise the higher volume of oxygen (21%) is needed for the inwards diffusion gradient of oxygen into the blood for ventilation of the lungs,and aeration of cells.
More water vapour are produced in the cells,therefore they must be diffused out of the cells in the blood.Hence higher percentage in the exhaled compare to the inhaled air
What are the structures found inside a cell that allow a cell to perform a variety of
functions?
EASY
In addition to the nucleus, eukaryotic cells may contain several other types of organelles, which may include mitochondria, chloroplasts, the endoplasmic reticulum, the Golgi apparatus, and lysosomes. Each of these organelles performs a specific function critical to the cell's survival.
The nitrogen cycle could not exist without
.
A phospholipid is structurally similar to a triglyceride except that in a phospholipid, a charged phosphate group replaces one of the
Answer:
The correct answer is - fatty acid.
Explanation:
A phospholipid is a one of lipid molecule which is present as major component of cell membrane, that plays a significant role. Phospholipids allow for selective passage of ions and other molecules through the cell membrane.
Phospholipid is structurally similar to triglyceride except that it is made up of two fatty acids instead of three fatty acid, in phosphoplipid third fatty acid is replace wit a phosphate group, however, glycerol molecule present in both. The phosphate group of the phospholipid is negatively-charged which makes it polar or hydrophilic head, .
Thus, the correct answer is - fatty acid.
Which element makes up 65% of living things?
Answer:
Oxygen
Explanation:
Oxygen (65%) and hydrogen (10%) are predominantly found in water, which makes up about 60 percent of the body by weight.
Answer: . Oxygen is the element which makes up to 65% of human body mass and every other living thing.
Explanation:
In this lab, you will study the fur color of mice.
A black and a white mouse are shown.
The color of the fur is the .The genetic combination of alleles that determine the fur color is called the .
Answer:
The color of the fur is the phenotype
The genetic combination of alleles that determine the fur color is called the genotype
Explanation:
The color of the fur is the genotype. The genetic combination of alleles that determine the fur color is called the phenotypes.
What is the genotype?
The genotype is the internal characters of the body.
The color of the fur is the genotype. The genetic combination of alleles that determine the fur color is called the phenotypes. And thus the black is the dominant color while the white is recessive.
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What are the personal qualities in being a bioligist
Answer:
knowledge of biology.
to be thorough and pay attention to detail.
maths knowledge.
excellent written communication skills.
analytical thinking skills.
excellent verbal communication skills.
the ability to work well with your hands.
the ability to use your initiative
What does selective mean?
Answer:
relating to or involving the selection of the most suitable or best qualified.
John's parents would not let him study while listening to CD's in his room. They told
Kim that he could not concentrate with the background noise. He decided to test this
idea with an experiment on his class. Each Friday his English class took a vocabulary
quiz on 25 new words learned that week. John got his teacher's permission to try his
experiment. On the first Friday of his test he played a rock song in the classroom
while the class took the test and the following week the class took the test with the
normal quiet atmosphere of a classroom. John calculated the average score on the two
vocabulary
Answer:
This question is incomplete; the question is asking to identify the following: independent variable, dependent variable, control group, experimental group, and constants.
The answers are:
Independent variable- BACKGROUND NOISE/MUSIC
Dependent variable- AVERAGE SCORE
Control group- THE CLASS THAT TOOK THE TEST IN A NORMAL QUIET ATMOSPHERE
Experimental group- THE CLASS THAT TOOK THE TEST WHILE PLAYING A ROCK SONG
Constants- SAME VOCABULARY QUIZ, SAME NUMBER OF WORDS, SAME CLASS
Explanation:
Independent variable in an experiment is the variable that is manipulated or changed in an experiment. In this experiment, the independent variable is the MUSIC or BACKGROUND NOISE played during each vocabulary test.
The dependent variable is the variable that is tested or measured in an experiment. It is the variable that responds to changes made to the independent variable. In this experiment, the dependent variable is the AVERAGE SCORE on the vocabulary test.
Control group is the group that does not receive the experimental treatment. It is the group where the independent variable does not change in order to compare with the experimental group. The control group in this experiment is THE CLASS THAT TOOK THE TEST IN A NORMAL QUIET ATMOSPHERE.
Experimental group is the group that receives the experimental treatment. The experimental group in this experiment is THE CLASS THAT TOOK THE TEST WHILE PLAYING A ROCK SONG
The constants or control variables are the variables that are kept constant or unchanged throughout the experiment in order not to influence the experiment's result. In this experiment, the constants include; SAME VOCABULARY QUIZ, SAME NUMBER OF WORDS, SAME CLASS
Toads that live in hot dry regions bury themselves in the soil during the day. How might this be important to the toad? Explain your answer using scientific terms.
Answer:
Toads that lives in hot dry regions bury themselves in the soil in order to lower their body temperature.....
Which of the following is NOT a characteristic of all living things?*
A) use of energy
B) need for oxygen
C) made of cells
D) stable internal environment
Answer:
The answer A. Use of Energy
Draw what a single chromosome would look like before and after S phase if the chromatin along with its DNA was condensed as it is during mitosis and meiosis
Answer AND Explanation:
Note: You will find the chromosome drawing in the attached file
The cellular cycle is the process of cellular duplication to result in two new cells. This process has different phases called G1, S, G2, and M.
In the G1 phase, the cell prepares to divide, duplicating the organelles, and growing in size.
During the S phase, the cell synthesizes a new copy of its DNA and also duplicates the centrosomes, which will help to separate DNI during division.
When the DNI is duplicated, the cell enters phase G2, condensing, and organizing the genetic material and preparing to cellular division.
The M phase belongs to mitosis, by which two daughter cells are formed.
The phases G1, S, and G2 are known as the interphase.
What is the function of the golgi apartus ?
Answer:
Processes and packages proteins and substances produced by cell;instruction where to go.
Answer:
transporting, modifying, and packaging proteins and lipids into vesicles
Explanation:
PLZ HELP ME 20 POINTS AND BRAINESIT
What is the world's largest source of surface water?
The Atlantic ice cap
The Antarctic ice cap
he Greenland ice cap
None of the above
if someone says hola to you, would you say como estas or hola back?
Answer:
you can say either of them, but most people usually just say hola and then that's when they say como estas
Explanation:
Answer:
You always greet them first and then ask them how their day is. :)
If humans had been present to build log structures during the Carboniferous period (though they were not!), which plant types would have been suitable sources of logs?
Answer:
The plant types suitable during that period would be ferns, horsetails, and lycopods.
Explanation:
A geologic period and system, which covers 60 million years from the termination of the Devonian period to the start of the Permian period is known as the Carboniferous period. During the Carboniferous period, the plant life was luxuriant and extensive, mainly at the time of Pennsylvanian. It comprises ferns and fernlike trees, that is, the giant horsetails known as club mosses, calamites, or lycopods like Sigillaria and Lepidodendron.
Thus, if humans had been present to construct log structures during the Carboniferous period, then they would have used logs of ferns, horsetails, and lycopods for construction work.
One out of 10,000 babies born in North America is affected by cystic fibrosis, a recessive condition. Assuming that the North American human population is in Hardy-Weinberg equilibrium for this trait, what percentage of the population is heterozygous for this trait
Answer:
2pq= 1.9% (almost 2%)
Explanation:
You will find the complete answer in the attached file due to technical problems.
what organisms don't have cell walls but contain chlorophyll
Answer:
Fungi is the answer of your question
What is a biome and why is it important to protect all kinds of biomes?
Answer:
a biome is a community with distinct climates for organisms both plant and animals.
Explanation:
When a biome is destroyed, food sources for many organisms are lost, as well as their habitat. many species will become endangered or extinct. as ome species become extinct it causes a chain reactiom affect many other species to become endangered and the nature will fail to balance. losing a biome causes loss of many plantatioms which many lead to more CO2 in the atmosphere and hence global warming. global warming casue draught, famine and again, loss of many species and even spread of diseases.
Write one scientific question about the organism in
the photo.
DONE
best defines homeostasis
Sentence:
The skill of keeping internal stability in an organism to regroup for environment changes
Word/Synonym:
Equilibrium
Is amoeba made up of a single cell or is it a cell itself??
Explanation:
Some things consist of only one cell. They are called unicellular organisms. One of the simplest living things, an amoeba, is made of only one cell. Amoebas (sometimes spelled amebas or amoebae) are too small to be seen without a microscope, but they are commonly found in ponds and lakes
What do different proteins do
Explanation:
Amylase, lipase, pepsin, trypsin
Help in digestion of food by catabolizing nutrients into monomeric units
Hemoglobin, albumin
Carry substances in the blood or lymph throughout the body
Actin, tubulin, keratin
Construct different structures, like the cytoskeleton
Insulin, thyroxine
Coordinate the activity of different body systems
Legume storage proteins, egg white (albumin) Provide nourishment in early development of the embryo and the seedling
In pea plants, tall plant height is dominant over short plant height. If there are 200 short plants in the F2 generation from a cross that followed Mendel’s methods, about how many plants will be tall in that generation?
200
300
600
1,000
Answer: D: 600
Explanation:
In pea plants, tall plant height is dominant over short plant height. If there are 200 short plants in the F2 generation from a cross that followed 600 plants are tall in that generation.
What is Mendel's methods?Mendel's groundbreaking research on inheritance in pea plants 150 years ago led to his emergence as the field of genetics' father.
With a passion for astronomy and plant breeding, Gregor Johann Mendel was a monk and educator. He was born in 1822 and enrolled in a Brünn monastery at the age of 21.
The monastery was a hub for science, religion, and culture with a library and a botanical garden. Mendel started a series of tests at the monastery in 1856 to learn how qualities are passed down from parent to child. At the time, it was believed that children combined the features of their parents.
Therefore, In pea plants, tall plant height is dominant over short plant height. If there are 200 short plants in the F2 generation from a cross that followed 600 plants are tall in that generation.
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Which Texas ecoregion is considered the wettest out of all the ecoregions? HELP
a man went from his home to market 3 kilometre away with a uniform speed of 4 kilometre per hour and finding the market closed Thi intense turns back with a velocity of 6 km per hour or find average speed of his journey
Answer:
The average speed of his journey is 4.8 kilometre per hour
Explanation:
The given parameters are;
The distance from the man's home to the market = 3 km
The man's speed on his way to the market = 4 km/h
The man's speed on his way back to his home = 6 km/h
The average speed, s = The total distance, d divided by the time, t that elapsed during the journey
s = d/t
We note that time = Distance/Speed
The time it took the man to get to the market = Distance/Speed
The time it took the man to get to the market = 3 km/(4 km/hr) = 3/4 hours
The time it took the man to get to get back to his home = 3 km/(6 km/hr) = 1/2 hours
The total time to and from the market = 3/4 + 1/2 = 5/4 hours = 1.25 hours
The total distance covered by the man = 3 + 3 = 6 km
The average speed, s = 6 km/(1.25 hours) = 4.8 km/hr
The average speed of his journey = 4.8 km/hr.
What is the term for the interior posterior surface of the eyeball that includes the retina, optic disc, macula and posterior pole that can be seen with an ophthalmoscope
Answer:
Fundus.
Explanation:
The fundus or ophthalmoscopy consists of viewing the retina and the optic disc through the pupil and the transparent media of the eyeball (cornea, aqueous humor, crystalline humor, and vitreous humor) including the optic disc, retinal vessels, macular area and fundus as a whole. It is an important component of the clinical evaluation of many diseases and is the only location where the vascular bed can be observed in vivo in a bloodless manner. The direct ophthalmoscope is available to perform it in Primary Care (PC) consultations and in other specialties, this is an optical instrument that directs light directly onto the retina through a mirror that reflects a ray from the light source. This mirror has a central hole that allows the observer to view the illuminated retina. The major retinal vessels are examined and tracked distally as far as possible in each of the four quadrants (superior, inferior, temporal, and nasal). The color, tortuosity, and caliber of the vessels are examined. The posterior pole is between the temporal vascular arches, measures 5-6 mm, and is where most of the lesions in diabetic retinopathy are located, such as microaneurysms, hemorrhages or exudates.