Answer:
8%
Explanation:
Given that,
Mass of solute = 8 g
Mass of soultion, (mass of alloy) = 100 g
We need to find the percent by mass of 8.0g copper is added to enough zinc to produce 100g an alloy. It can be calculated by the formula as follows :
[tex]\text{Mass}\%=\dfrac{\text{Mass of solute}}{\text{Mass of solution}}\times 100\\\\=\dfrac{8}{100}\times 100\\\\=8\%[/tex]
So, the percent by mass is 8%.
The percent by mass of the given copper in the alloy formed is 8%.
The given parameters;
mass of the copper = 8 gmass of the copper-zinc alloy = 100 gThe percent by mass of the given copper in the alloy formed is calculated as follows;
percent by mass of zinc = [tex]\frac{mass \ of \ zinc}{mass \ of \ the \ alloy} \times 100\%[/tex]
percent by mass of zinc = [tex]\frac{8}{100} \times 100\%[/tex]
percent by mass of zinc = 8%
Thus, the percent by mass of the given copper in the alloy formed is 8%.
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The figure above represents a rough endoplasmic reticulum. Which of the following best describes the role of the structure labeled Y
Answer:
The figure is absent in this question, however, it can be answered based on general understanding of the structure of rough endoplasmic reticulum. The options are:
A) Structure Y contributes the raw materials required for the synthesis of proteins
B) Structure Y packages proteins for export from the cell
C) Structure Y is the location where proteins are synthesized
D) Structure Y contains enzymes that cut and bind proteins.
The answer is C.
Explanation:
The rough endoplasmic reticulum is one of the two types of the endoplasmic reticulum, which is a part of the endomembrane system found in eukaryotic cells. The rough endoplasmic reticulum is so named "rough" because of the structures attached to its surface.
The structures attached to the surface of the rough endoplasmic reticulum are the structures labelled Y in the figure of this question. Those structures are called RIBOSOMES and they are the site (organelles) of protein synthesis in living cells. Therefore, structure Y is the location where where proteins are synthesized.
Why is it important for the daughter cells to divide a second time In meiosis?
Answer:
The second time the daughters cells divided haploid cells form and then migrate to other haploid cells in the process of fertilization.
Explanation:
Daughter cells divide a second time In meiosis because it creates cells that are destined to become gametes.
What is Meiosis?This is the type of cell division common in reproduction and gamete production and produces four unique daughter cells.
The daughter cells divide twice because it creates cells that are destined to become gametes as its union during fertilization would result in offspring with twice the normal number of chromosomes.
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Plsssss helppppp!!!!!!
I don’t understand biology at all and I am worried about how to pass biology . Does anyone have study tips for biology or anyways that can help me relearn everything
Answer:
Biology is not a hard class however it does require memorization and comprehension of certain topics. I recommend that you read over the chapters and make flashcards and test yourself. You can also ask your teacher for help. There are many videos available that do a great job at explaining each topic in biology. In addition, there are various websites that can also provide information. You should make study groups with your classmates as it is a more fun and effective way of studying.
Answer:
Firstly, don't stress, you'll get through it. Worrying will just slow you down, and learn Biology as something you get to do, and not a chore.
And if you want to relearn everything from the beginning, then I would recommend Crash Course's free Biology courses on YT, they also have Chemistry courses and everything. You can also go to Ask a Biologist, where you can do more than just ask questions.
There are so many more sources of information and everything, but one thing is; don't stress, that's the key.
Good luck, stay safe and healthy.
You'll get through it! Don't worry. If you want me to recommend more websites to you, just comment on this answer :D
Genes are segments of DNA that direct the development of some inherited traits.
True
False
How would you explain the difference between the following terms: species, population, and ecosystem? How are these terms connected to each other? Nour answer
Answer:
population is a group of organisms belonging to the same species that live in the same area and interact with one another. A community is all of the populations of different species that live in the same area and interact with one another. ... An ecosystem is made of the biotic and abiotic factors in an area
contains good bacteria that helps remove wastes
Answer:
Lymph
Explanation:
A colorless or faintly yellow fluid that helps remove wastes ,toxins ,and other harmful substances from the body ;also known as lymphatic fluid or interstitial fluid.
10. Use the theory of evolution to explain the observation that there are no tuskless males in the
park. WHY do males retain their tusks, when 50% of females lost them.
Type Here
Based on the theory of evolution, poaching of males for their tusk exacted a pressure on the elephant population which made more tuskless males to survive more than males with tucks as a result of natural selection.
Also, tucklessness as a trait is sex-linked, this explains why 50% of females lost their tusks why the males retain theirs.
Recall:
The theory of evolution describes the change that occur overtime through natural selection, whereby, offspring that are "fitter" are reproduced.Those that lack the fitness to survive produce fewer offspring than will survive.Male elephants are known to have tusks. However, poaching of elephants with tusks have exacted the pressure of natural selection on the population of elephants in the park.
The few tuskless males that are left surviving therefore produce more offspring as they pass the gene of tucklessness to their offspring. Over a long time, more tuckless males emerge while males with tusks will become almost non-existence as a result of natural selection.
A study showed that most females elephants have no incisors which suggests that the trait for tucklessness is sex-linked. This explains why 50% of the females lost their tusks and males retain theirs.
In summary, based on the theory of evolution, poaching of males for their tusk exacted a pressure on the elephant population which made more tuskless males to survive more than males with tucks as a result of natural selection.
Also, tucklessness as a trait is sex-linked, this explains why 50% of females lost their tusks why the males retain theirs.
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Stating the consequences of drug use is a resistance strategy that can involve __________. A. explaining why the drug is harmful for you B. explaining possible negative side effects of the drug C. explaining how your life might negatively change if you began taking the drug D. all of the above Please select the best answer from the choices provided. A B C D Mark this and return
Answer:
D. all of the above
Explanation:
It is all of them. When we are explaining to someone the consequences of taking a certain drug we can start by explaining to them why the drug in question is harmful to them. Will it ruin their body, their health or others. The drug may have some negative effects that we also need to explain. Telling them how it will ruin their life or their family if they start to take the drug.
Why are animal gametes haploid?
a. Gametes have two copies of each chromosome
b. Gametes are developing embryos that develop into haploid adults
c. Gametes have one copy of each chromosome to create a haploid individual
d. Haploid egg and sperm cells combine to create a diploid individual
Answer:
d. Haploid egg and sperm cells combine to create a diploid individual
Explanation:
Animals are diploid organisms (2n) and undergo sexual reproduction. This sexual reproduction causes them to produce gametes via a process called MEIOSIS. Meiosis is a division that reduced the number of chromosomes in the daughter cell (gamete) by half.
This means that meiotic division produces haploid gametes (n) from a diploid animal. This happens so that when the haploid sperm cell (male gametes) and haploid egg cell (female gametes) meet in a process called FERTILIZATION, a diploid individual is created.
Answer:
D. Haploid egg and sperm cells combine to create a diploid individual
Explanation:
similarities between viruses and non living things
Explanation:
nonliving characteristics include the fact that they are not cells have no cytoplasm or cellular organelles and carry out no metabolism on their own and therefore must replicate using the host cell's metabolic machinery. And viruses can infect animals, plants and even other microorganisms.
Please look at the imagine and tell me what the answer is
Answer:
Medial Malleolus is the answer
What is the atomic number of this atom?a,b,c
08
13
09
o 5
4,
Answer:
oxygen has the atomic number 8
13 is aluminum
09 is fluorine
05 is boron
4 beryllium
2. Which 2 organelles are found in BOTH plants and animals? *
Answer:
Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements.
Explanation:
WILL MARK YOU!!! HELP!
Where does sugar enter the blood?
Answer:
When the stomach digests sugar it turns into glucose. Glucose is then processed in the stomach and small intestines rather absorbed and then released into the bloodstream.
Explanation:
POSSIBLE POINTS
A part of the circulatory system allows the exchange of water, oxygen, nutrients, and waste between the blood and surrounding
tissues. Which part of the circulatory system is described. ?
Answer:
rough ER → ER-to-Golgi transport vesicles → Golgi cisternae → secretory or transport vesicles → cell surface (exocytosis)
Explanation:
What is the best way to determine if it is living or nonliving
Answer:
the pulse or the temperature of the body
Answer:
If it grows and develops, uses energy, reproduces, is made of cells, responds to its environment, and adapts to its environment, it's living. A non-living object will not conform to all of these, only one or multiple of these qualities.
PLS HELP ILL MARK BRAINLIEST !!!!
The flame of many stove burners is blue, but the wires of a toaster glow orange. How do you think the temperatures of these two cooking appliances compare?
Answer:
the hotter is it, the more bluish it is. And the more reddish it is, the colder it is
just like the bluer the star, the hotter it is, the redder the star, the colder it is.
Comparing the temperatures of the two cooking appliances ; The temperature emitted in stove burners are hotter than the temperatures emitted by the toaster
White-Blue flames are the hottest flames when combined together but the hottest single flame is the blue flame burning between ( 2,600º F and 3,000º F). Blue flames have more oxygen than other types of flames, hence they burn hottest and this is because gases when burnt are hotter than other materials. while
The orange flame of a toaster burns at a temperature between ( 1100°C to 1200°C) . releasing carbon monoxide as it burns.
Hence we can conclude that The temperature emitted in stove burners are hotter than the temperatures emitted by the wires of a toaster.
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Which one of the following is the infective stage of the Malarial Parasite?
A- Trophozoite
B- Sporozoite
C- Schigozoite
D-Sporoblast
What effect would a latitude of 60° have on the climate?
A. Extreme cold, deep freezing
B. Warm weather, short winters
C. Short summer, cold winters
D. Temperate weather, average winters
Answer:warm weather ,short winters
Explanation:
turn TACCATCGATTGGAA to a RNA sequel
The RNA sequence is:
AUG GUA GCU AAC CUU
Question 5
1 pts
What organelle of a cell has the genetic information?
O Vacuole
O Mitochondria
Chloroplast
O Nedeus
Answer:
nucleas
Explanation:
Which statement is correct regarding the semiconservative nature of DNA? Best answer will be marked brainliest
A. Nitrogenous bases in each “parent” strand serve as a template for the new strand to be made
B. The semiconservative nature of DNA allows DNA to stay the same during gamete (egg and sperm) production
C. RNA operates as a template to allow DNA to replicate itself using ribosomes
D. The structure of the sugars on the DNA molecule direct the correct nucleotides into place during replication
The semiconservative nature of DNA means that Nitrogenous bases in each
“parent” strand serve as a template for the new strand to be made
The semiconservative nature of DNA means that the DNA has two helices
which are created from one strand of the helix. The other DNA acts as a
template in which the new DNA is copied from.
A new DNA double helix consists of a hybrid of one strand of old DNA which
are bound to one strand of newly synthesized DNA to ensure the daughter
cells have unique features.
This feature makes DNA profiling important in identification as individuals
have a unique DNA.
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Helpppp meeeeeee plssss
Answer:
ok
Explanation:
ok thats the answer
The chamber of human heart is 2 ........ and 2 .........
A woman of childbearing years who is not pregnant has _______ absorption rate of calcium as compared to a woman who is pregnant
Answer:
The correct answer is - lower
Explanation:
Pregnant women require an increased amount of calcium as it can provide a sufficient amount of calcium for herself and her fetuses. During lactation, the calcium is reabsorbed very fast and rapidly that supplies the calcium for the milk. So, the normal women of childbearing age do not require the amount of calcium as pregnant women require.
Thus, there is a lower absorption rate of calcium as compared to a pregnant women
Which type of fossil appears as a “black painting” on a rock?
Answer: carbon film
Explanation: this answer is 100% right I’m staring at the answer on my test right now
A complete living thing, for example
a rabbit or an oak tree, is
A. a biome.
B. an organelle.
C. an organism.
D. a population.
Lihts Reserve
Answer:
C
Explanation:
a single living thing is an organism
Which correctly lists three materials that preserve soft tissues in fossils?
amber, minerals, and sediment
minerals, permafrost, and amber
permafrost, amber, and tar
sediment, minerals, and amber
Answer:
Permafrost, amber and tar
Explanation:
Fossils are the remains of prehistoric plants or animals embedded and preserved in rocks. They are preserved by three main methods: unaltered soft or hard parts, altered hard parts, and trace fossil.
Soft-tissue original remains are very rare except as captured in amber, trapped in tar, dried out or frozen in permafrost.
Amber is ancient tree sap that can trap flowers, worms, insects as well as small amphibians and mammals and preserve them whole.
Permafrost is an area of land that is permanently frozen below the surface. It is common in Siberia (part of Russia) and in Alaska. Many different kinds of frozen extinct as well extant animals have been found in Siberian permafrost, including woolly mammoths, horses and bison, and lions.
Tar or asphalt is a liquid found naturally in small pits in swamps. These pits are formed from crude oil seeping through the ground. The lighter elements of crude oil evaporate leaving thick sticky asphalt. Animals that fall into these pits hardly escape and their bodies are preserved within. Fossils of animals such as wolves, short-faced bears, American lions, ground sloth and saber-toothed cat have been found preserved intact in tar.
Answer:
c
Explanation: