Answer:
b
Explanation:
its an organism consisting of cells in the form of chromosomes with a distinct nucleus.
During a chemical reaction, increasing the temperature often
OA increases the rate of chemical change.
ОВ.
decreases the rate of chemical change
OC.
reverses the direction of chemical change.
OD. prevents a chemical change from occurring.
Answer:
A increases the rate of chemical change.Explanation:
Elements undergo chemical bonding-where electrons are shared, and rearranged to form various molecules and compounds. Bond formation in chemical reactions have specific requirements for molecular configurations and energy.
Molecules usually collide at random til conditions are favorable for bonding. Chemical change or reactions occur at faster rates at higher temperatures. Heating molecules increases their collision frequency and makes it more possible for the correct molecular orientation (for breaking and forming bonds) and energy to react are present.
4. What is the mass of N2H4 gas in a 350.0 mL container at 50.0 °C, if the pressure of the gas is
885.0 torr?
Answer:
0.36g
Explanation:
Given parameters and conversion to standard unit
To solve this problem we must assume ideality
Volume of N₂H₄ = 350mL = 0.35dm³
Temperature of container = 50°C = 50 + 273 = 323K
Pressure = 885torr;
760torr = 1atm
885torr = [tex]\frac{760}{885}[/tex] = 0.86atm
Unknown:
Mass of the compound = ?
Solution:
The mass of the compound can be derived using the expression below;
Mass = number of moles x molar mass
molar mass of N₂H₄ = 2(14) + 4(1) = 32g/mol
To find the number of moles;
PV = nRT
n = [tex]\frac{PV}{RT}[/tex]
P is the pressure
V is the volume
R is the gas constant = 0.082atmdm³mol⁻¹K⁻¹
T is the temperature
n = [tex]\frac{0.86 x 0.35}{0.082 x 323}[/tex] = 0.01mole
So,
Mass = 0.01 x 32 = 0.36g
Which option describes a similarity between scientific laws and scientific theories? 1.Both can change in light of new evidence. 2.Both explain how a phenomenon works. 3.Both are purely observations of nature. 4.Both are suggested explanations that are starting points.
Answer:
1.Both can change in light of new evidence
2.Both explain how a phenomenon works
Explanation:
Law and theory can be defined to be part of the nature of scientific knowledge. A scientific theory is a well-established explanation for observations of the natural world which can be verified by applying the scientific method, while a scientific law is a statement obtained from repeated experimental and/or observational procedures to describe and/or predict natural phenomena. Scientific theories can change when researchers discover new lines of evidence, while scientific laws also change based on new empirical evidence.
If our pupil is just a hole how does it go small and big when your thinking of something...
Answer:
This is controlled by muscles in the iris which will constrict or enlarge the pupil.
Explanation:
There is a certain type of fish in a lake. Fisherman can catch the largest of these fish using nets. They don't like the little fish and most of the smaller ones can get through the holes of the nets. After a few decades of this type of fishing, how do you think the fish population may change? Use the ideas explored in this article to give an explanation for your answer.
Answer:
After a few decades, there will be only small fishes, as directional selection will be acting in this population.
Explanation:
Directional selection increases in the proportion of individuals with an extreme phenotypic trait. Individuals expressing the other phenotypic extreme might be receiving different pressures that drive them to decrease their fitness. These pressures, in general, might be related to food access, niches availability, reproduction, predation, among others.
In this example, there are two extreme phenotypic traits, large and small fishes. Large fishes are being predated by fishermen, who prefer large individuals rather than small ones. Large fishes fitness start to decline, as they are being hunted. Only small fishes get to survive, they get to reproduce and hence, to have better fitness. Natural selection is acting on the size of these animals, favoring the small-sized ones. Over a few decades, the directional selection will increase the proportion of small fishes.
There are certain types of fish in the lake that the fishermen can catch using the nets. As they don't like the small ones which get out of the holes of the net.
As after a few decades there will be only small fish remaining As the directional selection will be acting on the population. Directional selection is when individuals with traits and one side there are better chances of survival.Learn more about the certain type of fish in a lake.
brainly.com/question/25841588.
what is the molar mass of MgF2?
A.24.3g
B.19.0g
C43.3g
D.62.3g
Answer:
62.3018 g
Explanation:
I also had this question on my quiz
Which is a frameshift mutation? substitution nonsense silent deletion
Answer:
deletion!
Explanation:
edge 2020
Deletion mutation is an example of frame-shift mutation.
FRAME-SHIFT MUTATION:Frame-shift mutation is a type of mutation in which the reading frame of a DNA (nucleotide) sequence is altered.
DNA or RNA is made up of nucleotides subunits, which is read in a particular pattern. When this reading pattern is shifted, frame-shift mutation is said to occur.
Deletion mutation and insertion mutation are the two kinds of mutation that results into frame-shift mutation.
Learn more about frame-shift mutation at: https://brainly.com/question/347745
why honey is beneficial for even diabetic patients
Answer:
One benefit of eating honey is that it could increase your insulin level and help control your blood sugar. Replacing sugar with honey can also be beneficial, considering how honey is a source of antioxidants and has anti-inflammatory properties.
Explanation:
what is the function of Queen Bee?
Explanation:
HONEY BEE QUEEN'S ROLE IN THE COLONY
The Queen Bee plays a vital role in the hive because she is the only female with fully developed ovaries. The queen's two primary purposes are to produce chemical scents that help regulate the unity of the colony and to lay lots of eggs.
Answer:
the function of queen bee are
1. to lay's egg
2. queen fed with royal jelly
Explanation:
What element is found in liver and is needed to prevent anemia or “tired” blood?
Answer:
Iron (Fe)
Explanation:
What kind of new therapies are scientists working on to treat cystic fibrosis?
Select all that apply.
gene therapies to fix the CFTR gene
injections to add water directly to the mucus
inhalers to deliver CFTR to the cells
gene editing to remove the CFTR protein
Answer:
The correct answer is B make cells produce a functional CFTR protein.
Explanation:
Cystic fibrosis is a disease that is caused due to the mutation in the transmembrane protein known as cystic fibrosis trans membrane conductance regulator or CFTR. Cystic fibrosis trans membrane regulator proteins helps in the formation of thin mucus and due to the mutation in CFTR the mucus becomes thick.The disease cystic fibrosis basically affect the respiratory system.
If gene therapy is used to treat cystic fibrosis then it can replace the mutated CFTR gene with a functional one so that the cell containing CFTR gene can produce functional CFTR protein.
Answer:
A. gene therapies to fix the CFTR gene
C. inhalers to deliver CFTR to the cells
Describe the different functions of the endocrine system.
Answer:
The endocrine system is a chemical messenger system comprising feedback loops of the hormones released by internal glands of an organism directly into the circulatory system, regulating distant target organs. In humans, the major endocrine glands are the thyroid gland and the adrenal glands.
Hello, I would love to ask you all a question . What solution will you get after sprouting onion in water?
Everyone pls answer.
Answer:
If you place a sprouted onion with the roots down in a glass of water, it will continue to grow on the top with new shoots. You can either cut off the top part and use it in recipes, or plant the whole onion, roots and all, in soil and watch it grow. All types of onions will regrow.
such fossil evidence supports which statement put forth by alfred wegener regarding the geologic history of earth
Answer:
Continental drift was a theory that explained how continents shift position on Earth's surface. Set forth in 1912 by Alfred Wegener, a geophysicist and meteorologist, continental drift also explained why look-alike animal and plant fossils, and similar rock formations, are found on different continents.
Explanation:
Answer: C) The continents were once United into a single supercontinent named Pangea, which broke apart and the continents gradually moved their current positions. (USATestprep)
Explanation:
The “Explanation” is all in the answer, really. :)))
What occurs in the light independent reactions?
Answer:
Light energy is harnessed in Photosystems I and II, both of which are present in the thylakoid membranes of chloroplasts. In light-independent reactions (the Calvin cycle), carbohydrate molecules are assembled from carbon dioxide using the chemical energy harvested during the light-dependent reactions.
Explanation:
Extreme acidity in soil helps plants thrive because the hydrogen ions kill off all harmful microorganisms that may stunt a plant's
development
True
False
Answer:
False
Explanation:
The best pH for soil is around 7-8 and the plant needs some of the microbial organisms to grow.
Answer: The correct answer is False
Explanation: This has been confirmed correct.
While some acidity is helpful, high acidity damages the root systems of plants.
what is a chlorophyll and where is it found
Answer It is found in the chloroplasts
Explanation:
Consider the solid phase of the substances listed in the chart. In which substance are the intermolecular forces strongest?
a. helium c. water
b. mercury d. aluminum
Answer:
it would be A helium I think
Explanation:
what do plants use nutrients for?
Answer:
they help create new cells
Which statement best describes cancer cells?
They grow as a single layer of cells.
They cease to reproduce after 20–50 mitotic divisions.
They reproduce only when needed to replace missing cells.
They are not regulated by contact inhibition.
Answer: They are not regulated by contact inhibition.
Explanation:
Contact inhibition is a form of controlling cells. Cancer doesn't have contact inhibition, which is one of the reasons why it spirals out of place so easily.
Answer:
They are Not regulated by contact inhibition.
Explanation:
The other 3 options are not characteristics of a cancer cell. Cancer cells have unlimited cell division, no anchorage dependent inhibition, no contact inhibition, and forms tumors - hence they don't form a single layer of cells.
Why is the world's loss of biodiversity a source of concern?
O a. Humans depend upon other organisms for food and oxygen
b. Species have value to humans, both monetary and because we like them
c. Tourism depends on the preservation of certain animal species
d. Both (a) and (b)
Answer:
a) Humans depend upon other organisms for food and oxygen
Explanation:
Biodiversity refers to the richness in the species of organisms on Earth i.e the variety of biological organisms on the Earth. The importance of biodiversity cannot be overemphasized because of our dependence on the sustainability of biodiversity in our ecosystems.
The loss of biodiversity, which is becoming rampant by the day, is a major concern to us because we humans depend upon other organisms for food and oxygen. Humans are strictly heterotrophic and hence are reliant on variety of organisms for food. Plants also release oxygen gas via their photosynthetic process, which is key to our survival as a population.
The study of the environment is called ecology.
The correct answer is A.
The loss of animals and plants in the ecosystem is called loss of biodiversity. These reasons for the loss is as follows:-
Overexploitation.Invasion of alien speciesGreedHabitat lossThe loss of these species has a high impact on the ecosystem as these have an important function to form forests.
All the species are dependent on each other.
Hence, the correct option is A that is humans depend upon other organisms for food and oxygen
For more information, refer to the link:-
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Please can someone help me with this!????
Answer:
Darker colors absorb heat so the darker fur color on the extremities would help in keeping the rabbits warm.
Cell membrane questions
Please help will give brainlist
Answer:
IM DEAD BUT ALIVE BUT IM DEAD
Explanation:
Answer:
false
true
false
true
false
true
false
true
false
true
_______________ transport moves substances from an area of high concentration to an area of low concentration.
Answer:
It is active. The person above me is wrong. Trust me.
Explanation:
The temperature of Mercury is not regulated and the atmosphere easily floats away while being
replaced with solar wind.
Mercury has a
atmosphere.
the temperature of mercury is not regulated and the atmosphere easily floats away while being replaced with solar wind .
Mercury has a thin atmosphere.
Which of these represents transfer of heat through conduction when a fireplace is lit in a room?
Hot air rises through the chimney.
Cool air is drawn in from the sides.
A spade placed in the fire turns hot.
A person sitting nearby feels the hea
Answer:
A spade placed in the fire turns hot.
Explanation:
responds to tissue damage pain
Answer:
Upon tissue injury, damaged cells release inflammatory chemical signals that evoke local vasodilation, the widening of the blood vessels. Increased blood flow results in apparent redness and heat. In response to injury, mast cells present in tissue degranulate, releasing the potent vasodilator histamine.
Explanation:
Explain the roles of cytoplasm and the mitochondria in cellular respiration.
Answer:
Mitochondria have an important role in cellular respiration through the production of ATP, using chemical energy found in glucose and other nutrients. Mitochondria are also responsible for generating clusters of iron and sulfur, which are important cofactors of many enzymes
Explanation:
How would the seasonal paths of the Sun change for a location that is more North of this latitude?
Answer:
At the North Pole, the sun is above the horizon for six straight months (March through September), spinning around in horizontal circles, reaching a maximum height of 23.5° above the horizon at the June solstice. As you travel southward in the northern hemisphere, the noon sun gets higher and higher.
Explanation:
Add the north pole the sun is above the horizontal for six straight months
The products of photosynthesis are the...
a) Products of cellular respiration
b) Reactants of cellular respiration
c) Reactants of fermentation
d) Products of glycolysis
The products of Photosynthesis are the reactant of cellular respiration. So, the correct option is (B).
What is Cellular respiration?Cellular respiration is defined as the process by which organic fuels are oxidized in the presence of an inorganic electron acceptor such as oxygen to produce large amounts of energy to drive the bulk production of ATP.
It works in the presence or absence of oxygen. But crucially, the process is called cellular respiration because the cell "respires" in a way that takes in molecular oxygen (as the electron acceptor) and releases carbon dioxide (as the end product).
The cellular respiration is represented as
[tex]C_6H_1_2O_6 + 6O_2 ---- > 6CO_2 + 6H_2O[/tex]
Their reactant are the products of Photosynthesis.
So, the products of Photosynthesis are the reactant of cellular respiration. So, the correct option is (B).
Learn more about Cellular Respiration, here:
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