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
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
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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The nitrogen cycle could not exist without
.
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:
What are the smallest functional and structural building blocks of life
Answer:
Explanation:it is a cell because that is what starts life
what are the similarities between living and non living things
both having gravity, you can touch and see both of it. It also possible if microorganisms can live on both of them.
They both have shape also.
Answer:
1. They both occupy space.
2. They both are made of atoms and molecules.
3. They both can be moved at the cost of energy.
4. They both have mass.
5. They both consist of fundamental units.
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NB: Similarities between are mostly: [Both have, contain] Meaning we should use (Both) in writing similarities.
Which of these elements is found in both carbohydrates and water?
Answer:
tyyyyyyyyyyyyyy
Explanation:
yyyyyyyyyyyyyy
Answer: B
Explanation:
What is the pH of a 0.15 M NH4OH solution with a Kb of 1.78 x 10^-5?
a. 11.21
b. 11.93
c. 12.09
d. 10.85
Answer:
The correct option is;
a. 11.21
Explanation:
The chemical equation for the reaction is;
NH₄OH ↔ NH₄⁺ + OH⁻
At the start of the reaction, we have;
NH₄OH ↔ NH₄⁺ + OH⁻
I [tex]{}[/tex] 0.15 0 0
C 0.15 - x +x +x
The [tex]k_b[/tex] = 1.78 × 10⁻⁵
Therefore, we have;
1.78 × 10⁻⁵ = [NH₄⁺][OH⁻]/NH₄OH = x²/(0.15 - x)
Which gives;
(0.15 - x) 1.78 × 10⁻⁵ = x²
x² + 1.78 × 10⁻⁵x - 2.67× 10⁻⁶ = 0
Factorizing the above equation online, gives;
(x + 0.00164294)(x - 0.00162514) = 0
Therefore;
x = -0.00164294, or x = 0.00162514
We use the positive result, which is x = 0.00162514 = 1.62514 × 10⁻³ = [OH⁻]
Therefore;
pOH = -log[OH⁻] = -log(0.00162514) = 2.789
pH + pOH = 14
Therefore;
pH = 14 - pOH = 14 - 2.789 ≈ 11.21089
The pH of a 0.15 M NH₄OH solution with [tex]k_b[/tex] = 1.78 × 10⁻⁵ = 11.21.
The pH of a 0.15 M NH₄OH solution with [tex]k_b[/tex] = 1.78 × 10⁻⁵ is approximately 11.21
pH value is the measure of acidic or base properties of a solution.
The answer to the given question is a. 11.21. It is explained as follows.
The range of pH value is between 0 to 14 in which value 7 is the neutral pH which is associate with water.
The water has no dominant properties of acid neither base.
The pH value below 7 is for acidic properties and for above 7 is associate with base properties.
The pH value of 0.15 M NH4OH solution is 11.21 as it displays strong base properties.
The correct answer is a. 11.21.
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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.
Which of the following can be attributed to water's high specific heat? O Oil and water do not mix well. O Alake heats up more slowly than the air around it. Ice floats on water. Sugar dissolves in hot tea faster than in iced tea.
Answer:
O A lake heats up more slowly than the air around it.
Hope this helps :)
The high specific heat of water makes lakes to heat up more slowly than the air around it.
Water is said to have high specific heat, what this means is that it requires more energy to raise the temperature of water in relation to other substances.
Before water can become hot or warm, it first has to be able to absorb a lot of heat around. This is very important to climate and it also helps to determine if certain areas of the world are habitable.
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Write one scientific question about the organism in
the photo.
DONE
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
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. :)
How are natural resources classified?
renewable resource
Explanation:
they are the resource made by god
Select the correct answer. Which compound is inorganic?
Answer:
B
KH2PO4
Explanation:
Answer:
B. KH2PO4
Explanation:
Answer correct from plato
What does selective mean?
Answer:
relating to or involving the selection of the most suitable or best qualified.
Which Texas ecoregion is considered the wettest out of all the ecoregions? HELP
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.
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.....
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.
An experiment was conducted to determine if hot water will freeze faster than water at room temperature. Which of the following is the dependent variable? 1.Temperature of the freezer 2.The water at room temperature 3.The hot water 3.The rate of freezing
Answer:
The dependent variable is the variable that changes when the independnet variable is manipulated.
Explanation:
The independent variable is the water temperatures, the variable you change. The dependent variable is the rate of the water freezing.
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.
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
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.
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.
Why do researchers need a lot of data to monitor a species population?
Answer:
Researchers need a lot of data to monitor a species population because the environment is very diverse in types of species found at different places .
What happens to one part of it could affect the population of other animals, humans, and may also effect the ecosystem of that certain environmental region .