which of the following is true regarding hypertension and the loss of elastin?
If the arteries become less stretchy, the heart will have to work harder to eject blood.
Explain why the blue color of starch-iodine complex disappears upon heating?
Answer: Starch is a long polymer molecule in one shape of a coil. The iodine molecules goes inside of the coil and this is what makes it turn blue/black. Iodine is a diatomic element with the formula, I2.
Explanation:
Answer:
This is because the compound of iodine and starch is unstable, but if you put the test tube in cold water, a dark blue sediment will form once more. When starch is heated to boiling point, it begins to break down, and the chains of amyloses break, thus, forming short chains of dextrins, so the colour starts to change.
Explanation:
30. The entire molecule shown in the diagram below is the building block for RNA and is called a(n)
Phosphate
group
Nitrogen
bose
Suga
O pyrimidine.
O amino acid.
O polysaccharide.
O nucleotide.
Answer:
Nitrogen Base/Nucleotide
Explain why the parents cell and both daughter cells must have the same number of chromosomes
Answer:
It's occur in mitosis.
Explanation:
This occur mainly in Mitosis.
In mitosis the parent cell divides into two daughter cells and its then replicates it chromosomes number or dna in the daughter cells. Therefore each daughter cells carries the same number of chromosome as the parent , therefore they are genetically identical as the parent cells.
Therefore, they most have the same number of chromosomes so that they can be genetically identical as the parent cell
Daughter mitotic cells must have the same genetic information as parent cells to carry out normal cellular functions. Moreover, mitosis also ensures the correct segregation of homologous chromosomes in successive cell divisions.
Mitosis is a type of cell division in which one cell divides to produce two daughter cells that are genetically identical to the parental cell. This type of division occurs in all types of cells in the body, with the exception of gametic cells located in the ovary (egg) and the testicles(spermatic cells). In diploid (2n) cells that have two sets of homologous chromosomes, mitosis results in the formation of two 2n cells with identical genetic content.Thus, mitosis ensures that the number of chromosomes in each cell division is constant, thereby daughter cells will have the same number of chromosomes as the parent cell. This maintenance of the chromosome number is fundamental to grow and self-maintain the body.Chromosome imbalance due to errors during mitosis (i.e., error in segregation of homologous chromosomes) may lead to the disruption of large numbers of dosage-sensitive, developmentally essential genes and therefore result in disease/lethal phenotypes.Conversely, meiosis is a reductional type of cell division that reduces the number of chromosomes in the parent cell by half in order to four gamete haploid (n) cells. During fertilization, male and female n gametes fuse to produce a diploid cell (i.e., the zygote) that develops into an adult, thereby perpetuating the correct number of pairs of chromosomes in the cells of any given species.
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Where is most of the water from your food absorbed?
Question 8 options:
esophagus
large intestine
small intestine
stomach
Asha crushed some purple berries from a bush and mixed them with a little water. When she mixed the juice with some wet washing powder, the colour changed to red. She said, "this proves that berries are an indicator and the washing powder is an alkali." Is Asha correct? Explain your answer.
Answer:
Yes Asha is correct because when she mixed the purple berry with water into the chemical it changed color.
Explanation:
The barred owl has been moving into the habitat of the spotted owl. This could lead to a reduction in the spotted owl population if what?
Answer: If there is competition for food and nesting areas.
Explanation: Barred owls and spotted owls are well known as rivals. Barred owls are known to be aggressive towards spotted owls and are both bigger and more aggressive than them.
osmatic presure example ......................?
Answer:
The correct answer is - raising in water becomes puffed, or uptake of water and minerals from roots.
Explanation:
The minimum pressure applied to a solution to prevent the entering the flow of its pure solvent through q semipermeable membrane. The process of flowing the pure solvent to the solution through a semipermeable pressure is known as osmosis and the minimum pressure required to preventing the osmosis is osmotic pressure.
Many plants springing up through tree roots growing through concrete. Due to osmotic pressure, the plants grow they require more water, the inexorable osmotic pressure of water moves through the membranes can actually push through asphalt!
Movement of salt-water in the animal cell across our cell membrane and keep raisin in water and the raisin gets puffed are other examples of this phenomenon.
assume that life on Mars requires cell potential to be 100mV, and the extracellular concentrations of the three major species are following (mmol/L): Na : 145; K : 4; Cl- : 120. Choose one species and assume that other two probabilities are zero. Design the cell by calculating the intracellular concentration of the chosen species.
Answer:
Explanation:
From the information given:
The cell potential on mars E = + 100 mV
By using Goldman's equation:
[tex]E_m = \dfrac{RT}{zF}In \Big (\dfrac{P_K[K^+]_{out}+P_{Na}[Na^+]_{out}+P_{Cl}[Cl^-]_{out} }{P_K[K^+]_{in}+P_{Na}[Na^+]_{in}+ P_{Cl}[Cl^-]_{in}} \Big )[/tex]
Let's take a look at the impermeable cell with respect to two species;
and the two species be Na⁺ and Cl⁻
[tex]E_m = \dfrac{RT}{zF} In \dfrac{[K^+]_{out}}{[K^+]_{in}}[/tex]
where;
z = ionic charge on the species = + 1
F = faraday constant
∴
[tex]100 \times 10^{-3} = \Big (\dfrac{8.314 \times 298}{1\times 96485} \Big) \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]
[tex]100 \times 10^{-3} = 0.0257 \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]
[tex]3.981= \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)[/tex]
[tex]exp ( 3.981) = \dfrac{4}{[K^+]_{in}} \\ \\ 53.57 = \dfrac{4}{[K^+]_{in}}[/tex]
[tex][K^+]_{in} = \dfrac{4}{53.57}[/tex]
[tex][K^+]_{in} = 0.0476[/tex]
For [Cl⁻]:
[tex]100 \times 10^{-3} = -0.0257 \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)[/tex]
[tex]-3.981 = \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)[/tex]
[tex]0.01867 = \dfrac{120}{[Cl^-]_{in}}[/tex]
[tex][Cl^-]_{in} = \dfrac{120}{0.01867}[/tex]
[tex][Cl^-]_{in} =6427.4[/tex]
For [Na⁺]:
[tex]100 \times 10^{-3} = 0.0257 \Big ( \dfrac{145}{[Na^+]_{in}} \Big)[/tex]
[tex]53.57= \Big ( \dfrac{145}{[Na^+]_{in}} \Big)[/tex]
[tex][Na^+]_{in}= 2.70[/tex]
what would happen if the fish didn’t have a bladder
Answer:
die because bladder is really important to
help pleaseee
give an example of lamarcks theory of evolution:
how do scientist classify animals
Animals get their energy by eating plants an animals. A living thing that needs to eat to obtain energy is called a?
Animals get their energy by eating plants an animal. A living thing that needs to eat to obtain energy is called a heterotroph.
Energy is defined as the property of matter that allows it to perform work or function.
Heterotrophs are organisms that obtain their energy by consuming other living things, such as plants or animals. They play an important role in the food chain, as they consume other living things and transfer energy up the chain.
For example: A herbivore (an animal that eats plants) is a heterotroph that obtains energy from the plants it consumes.
Therefore, heterotroph is a living thing that needs to eat to obtain energy.
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Based on the graph which of the following could be used to increase the reaction rate beyond point C
type of nutrition shown by all fungi
Fungi cannot produce their own food like plants can, nor can they consume it like animals can. Instead, fungi get their nutrition by absorbing it from their surroundings.
What is fungi ?Eukaryotic creatures known as fungi include yeasts, molds, and mushrooms as well as other microbes. These organisms fall under the category of fungus. The creatures that make up the Kingdom Fungi are pervasive and have a cell wall. They fall under the category of heterotrophs among living things.
Both varieties of fungi emit digestive enzymes into the nutrient surface they are growing on in order to feed. Proteins and carbohydrates are broken down by the enzymes and then absorbed through the walls of the hyphae.
All fungi are heterotrophic, which means they draw their energy from other living things. Like animals, fungi draw energy from live or dead organisms through the bonds of organic substances like sugar and protein.
Thus, Fungi cannot produce their own food like plants can, nor can they consume it like animals can.
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Which of the following is an example of cohesion?
water attracted to the side of a glass tube
water droplets attached to a spider web
water forming raindrops
hydrogen bonding
Answer:
I would think it's A sorry if this was wrong
Explanation:
List and describe the 3 roles of DNA
Which of these statements is correct about material 1 and 2?
The half-lives of Material 1 and Material 2 are same.
The half-life of Material 2 is one-fourth of the half-life of Material 1.
The half-life of Material 2 is 5 years more than the half-life of Material 1.
The half-life of Material 1 is 5 years more than the half-life of Material 2.
Answer:
D. The half-life of Material 1 is 5 years more than the half-life of Material 2.
Explanation:
As you can see in the graphs for material 1 to get to 50% it takes 30 years. for material 2 it takes 25 years to get to 50%. Therefor the halflife of material 1 is 5 years more than material 2
What form of nitrogen is most abundant on earth?
Answer:
Dinitrogen is the most common form. It makes up 78 percent of the atmosphere but cannot be used by plants. It is taken into the soil by bacteria, some algae, lightning, and other means.
Explanation:
What process can occur between non-homologous chromosomes while in the tetrad configuration?
Mitosis is the process of one cell splitting apart to form two cells.
True
False
______________________________
QUESTION 2.
Chromatin consists of long strands of material located within the nuclear membrane.
True
False
______________________________________
Question 3.
The process of producing new cells is called cell reproduction.
True
False
Answer:
Question 1: true! Question 2: true! Question 3: false
Explanation:
this might not sound like much, but I LOVE science! however i'm not 100 percent sure on question 2.
why are we still here? just to suffer
Answer:
and We were born just to die
Answer:
Explanation:
every night I can feel my leg and arm
explain how the ability to manage intrapersonal conflict may help you deal better with interpersonal conflict amongst your friends
Answer:
How many patients had allergies or ear infections, but not both?
24
27
36
40 answer
Explanation:
List the Earth’s 4 spheres and give 1 example from your Environment for 2 of the speres.
Answer:
read this
Earth's Spheres
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called “spheres.” Specifically, they are the lithosphere (land), hydrosphere (water), biosphere (living things), and atmosphere (air). Each of these four spheres can be further divided into sub-spheres. To keep things simple in this course, there will be no distinction among the sub-spheres of any of the four major spheres.
Lithosphere - Land
The lithosphere contains all of the cold, hard solid land of the planet's crust (surface), the semi-solid land underneath the crust, and the liquid land near the center of the planet.* The surface of the lithosphere is very uneven (see image on right). There are high mountain ranges like the Rockies and Andes (shown in red), huge plains or flat areas like those in Texas, Iowa, and Brazil (shown in green), and deep valleys along the ocean floor (shown in blue).
The solid, semi-solid, and liquid land of the lithosphere form layers that are physically and chemically different. If someone were to cut through Earth to its center, these layers would be revealed like the layers of an onion (see right image above). The outermost layer of the lithosphere consists of loose soil rich in nutrients, oxygen, and silicon. Beneath that layer lies a very thin, solid crust of oxygen and silicon. Next is a thick, semi-solid mantle of oxygen, silicon, iron, and magnesium. Below that is a liquid outer core of nickel and iron. At the center of Earth is a solid inner core of nickel and iron.
* Note: The word "lithosphere" can take on different meanings depending on the speaker and the audience. For example, many geologists--scientists who study the geologic formations of Earth--reserve the word "lithosphere" to mean only the cold, hard surface of Earth, not the entire inside of the planet. For the purpose of this course, however, there will be no distinction among the various layers of land. The word "lithosphere" will be used in reference to all land in Earth's system.
Hydrosphere - Water
The hydrosphere contains all the solid, liquid, and gaseous water of the planet.** It ranges from 10 to 20 kilometers in thickness. The hydrosphere extends from Earth's surface downward several kilometers into the lithosphere and upward about 12 kilometers into the atmosphere.
A small portion of the water in the hydrosphere is fresh (non-salty). This water flows as precipitation from the atmosphere down to Earth's surface, as rivers and streams along Earth's surface, and as groundwater beneath Earth's surface. Most of Earth's fresh water, however, is frozen.
Ninety-seven percent of Earth's water is salty. The salty water collects in deep valleys along Earth's surface. These large collections of salty water are referred to as oceans. The image above depicts the different temperatures one would find on oceans' surfaces. Water near the poles is very cold (shown in dark purple), while water near the equator is very warm (shown in light blue). The differences in temperature cause water to change physical states. Extremely low temperatures like those found at the poles cause water to freeze into a solid such as a polar icecap, a glacier, or an iceberg. Extremely high temperatures like those found at the equator cause water to evaporate into a gas.
** Note: Some scientists place frozen water--glaciers, icecaps, and icebergs--in its own sphere called the "cryosphere." For the purpose of this course, however, frozen water will be included as part of the hydrosphere. The word "hydrosphere" will be used in reference to all water in Earth's system.
Biosphere - Living Things
The biosphere contains all the planet's living things. This sphere includes all of the microorganisms, plants, and animals of Earth.***
Within the biosphere, living things form ecological communities based on the physical surroundings of an area. These communities are referred to as biomes. Deserts, grasslands, and tropical rainforests are three of the many types of biomes that exist within the biosphere.
what is the biological term of the Close Association between two organisms where one or both benefit
Answer:
Symbiosis is the biological term of the close association between two organisms where one or both benefit.
I’ll mark u as brainliest!
Answer:
1. The cells grew because of cell division. (One cell doubles by two)
2. The G stands for Growth
3. Circle the little purple things
What are the differences between the transport of materials in xylem and phloem ? I need long answer, pls help me guys.
Xylem tissue helps in the transport of water and minerals. Phloem tissue helps in the transport of food. Transport in xylem requires physical forces such as transpiration pull. Transport of food in phloem requires energy in the form of ATP.
which animal have blue blood
Octopus... I guess_________!!!!!
Answer:
octopus
Explanation:
the blue blood comes from a copper-rich in protein called hemocyanin
Fossils show that ancient horses had shorter legs than modern horses. What is most likely responsible for the evolution of long legs in the horse species?Immersive Reader
(5 Points)
The horses’ legs stretched because humans started to ride on horses.
The horses began to eat different foods, which made their leg bones grow longer.
The horses’ legs stretched because the horses started to run faster than ancient horses.
The horses born with longer legs were more likely to survive and reproduce.
The last one. Horses evolved and adapted to the new environment which is why they're legs grew longer
A wooded area experienced an extreme drought after years of very little rainfall. What was the most likely effect of the drought on this ecosystem?
A. Populations of soil organisms increased as the amount of water in the soil decreased.
B. Populations of herbivores increased due to the increased vegetation available for them to eat.
C. Populations of plants that require very little water decreased more than those that need a lot of water.
D. Populations of both trees and shrubs decreased due to the increased competition for water.
Answer:
D. Populations of both trees and shrubs decreased due to the increased competition for water.
Explanation:
if both of the trees are competing for water both of them will decrease bc they will both take water from each other causing both of the trees to die.