please help me this is grade 7 work btw
functions of the fine cytoplasmic filaments
Answer:
Striated, smooth, and cardiac muscle cells contain vast numbers of cytoplasmic filaments that function during the contraction of these cells. ... The contraction of striated muscle cells shortens the muscle, which then moves the skeleton.
What percent of our overall global electricity use is accounted for by the internet and computer usage?
A.20%
B.5%
C.10%
D.50%
Answer:
I think it's 10% sorry if i'm wrong
Explanation:
Answer:
50 percent
Explanation:
PLEASE HELP SCIENCE
Question: How does a region’s latitude impact its climate? What role does the sun play on an area’s climate?
Answer:
Places with latitudes closer to the Equator have hotter climates. Places with latitudes closer to the Poles have colder climates. This happens because the Sun's rays hit them more or less directly.
The Sun powers life on Earth; it helps keep the planet warm enough for us to survive.
Which of the following problems could potentially be solved through DNA fingerprinting?
A. test to confirm that a calf was fathered by a specific bull
B. produce a bull with identical DNA to a champion
C. produce a very small but healthy breed of cow
D. remove a gene to develop cows with no horns
Answer:
answer is clearly a
Explanation:
my teacher told me
2 characteristics of earth's crust??
Answer:
The earths crust is composed by a variety of igneous, metamorphic, and sedimentary rocks. The crust is underlain by the mantle. The crust occupies less than 1 percent of the earths volume.
Recently living organisms have been reclassified into three domains. A new living object has been found. It is multicellular, and can make its own food by using the sun. The cells have a cell wall, and they have a nucleus. CLE Which of the following could it be classified as?
1.animalia
2.plantae
3.fungi
4.protista
What is the difference between primary and secondary succession? Give an example of each.
Answer:
Some examples of primary succession include the formation of a new ecosystem after a volcano, glacier outbursts, or a nuclear explosion. Some examples of secondary succession include succession after a fire, harvesting, logging, or abandonment of land, or the renewal after a disease outbreak.
Explanation:
Which statement best describes evolution?
Answer: Traits acquired during a lifetime are passed to offspring.
Answer:
Traits acquired during a lifetime are passed to offspring
Explanation:
Evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection, so the other answes don't make sense
Clouds form when water vapor _________.
A. evaporates
B. condenses
Answer:
B. condenses
Explanation:
Clouds form when water vapor condenses.
A scientist is studying the Bear Creek swamp, which is wet most of the year and is filled with such animals as alligators, beavers, and numerous kinds of fish.
What kind of ecosystem is the Bear Creek swamp?
wetland
pond
stream
estuary
Answer:
Wetland
Explanation:
It is wet most of the year
There is also alligators, which tend to be there commonly.
AND in the start of the question, it says swamp, swamps are the most similar to wetlands.
5. Why are fingerprints stronger individual evidence than nDNA?
Compared to fingerprint evidence alone, DNA was far more likely to lead to suspects and result in arrests. In crime scenes where biological evidence was collected and tested, DNA evidence was five times more likely than fingerprints to yield a suspect and nine times more likely to lead to an arrest.
Plant Growth
50
40
Growth (cm)
20
10
0
8
40
16 24 32
Temperature (C)
Which of these would be the best conclusion regarding the experimental results shown?
® This species of plant grew best between 18°C and 26°C
Plants will not grow above 26°C
The tallest this species of plant will ever grow is 50 cm
The ideal temperature for all plant growth is 26°C
Answer:
I think it is F but i am not sure hope it helps
Scientists are concerned about a decrease in global biodiversity due to extinctions of organisms now and in the future. Scientists know about a mass extinction that wiped out the dinosaurs in a very short time. Describe a possible cause of this mass extinction and two consequences that may give scientists cause for alarm about the possibility of future mass extinctions.
Answer:
Mass extinctions happen because of climate change, asteroid impacts, massive volcanic eruptions or a combination of these causes. One famous mass extinction event is the one that lead to the extinction of dinosaurs, 65 million years ago.
Explanation:
In the United States, there has been an increase in the number of people infected by mosquito spread diseas that were previously found only in countries south of the United States. Scientists want to investigate the cause of the increase in mosquito spread diseases. Scientists have predicted that the mosquitos carrying disease have moved further north as global temperatures have increased. Which questions would help investigate how the new mosquitoes are affecting the ecosystems of the United States ? Select all that apply. AHow much money has been spent to fight the diseases caused by these mosquitoes across the globe? B. How have the food webs in the United States changed as a result of the new mosquitoes? the natural predators to the mosquitoes also migrated north? What types of organisms are preying on the mosquitoes in their new habitats? E Are places in the United States using more pesticides to kill the new mosquitoes? If so, how are these pesticides impacting others in the ecosystems
Answer:
What types of organisms are preying on the mosquitoes in their new habitats?
Explanation:
I think it is all the answers except for What types of organisms are preying on the mosquitoes in their new habitats? this is because when a new species comes to an area it does not have anything to prey on it
According to biological classification, which of these pairs represents animals that are the MOST closely related? A) crabs and fish B) crabs and snakes C) crabs and penguins D) crabs and grasshoppers
Answer:
D)crabs and grasshoppers
Explanation:
Circle the letter of each sentence that is true about the cell wall.
a. Cell walls are made of cellulose.
b. Plant cells have cell walls.
c. Animal cells have cell walls.
d. Water and oxygen cannot pass through the cell wall
Answer:
D.Water and oxygen cannot pass through the cell wall
Explanation:
not sure
A scientist wants to observe the structure that joins a cell of a neighboring cells. How should the scientist observe the detailed structure of the cell?
Answer:
The images obtained from the electron microscope provides key knowledge regarding the structural basis of cell function and various diseases associated with the cells. Thus, if a scientist desires to see the structure, which binds a cell with the adjacent cells, he or she should use an electron microscope.
Explanation:
please mark this answer as brainliest
which of the following is NOT a natural resource?
A gold
B water
C oil
D fire
Answer:
D
Explanation:
Fire is man made because for there to be fire you have to strike a match or use other man made sources
Different organs work together to create an ____________ that carries out a specific process in the body.
A. organ system
B. cell
C. tissue
Answer:
organ system A
Explanation:
Answer:the answer is a
Explanation:
The ungiven term that represents the elements in DNA in the figure is
Which principle allows us to assign dates to events on the geologic time scale?
faunal succession
extinction
radioactive decay
relative dating
The principle that allows us to assign dates to events on the geologic time scale is radioactive decay. Therefore, option (C) is correct.
What is radioactive decay?This theory is based on the observation that certain isotopes of elements are inherently unstable and, as a result, decay over time, giving rise to the formation of new isotopes or elements. Scientists are able to determine the age of a sample by measuring the ratio of parent to daughter isotopes in the sample. This, in turn, enables them to assign dates to events on the geologic time scale.
The method of determining the age of rocks, minerals, and other geological materials is known as radiometric dating, and it is utilized extensively in the field of geology as well as in other earth sciences.
Learn more about radioactive decay, here:
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Rasheeda made a model of a plant cell and labeled parts of the cell that are not found in animal cells. Which other part of the cell should Rasheeda label
Answer:
Cell wall, chloroplasts, plastids, and a central vacuole.
Explanation:
Rasheeda has to label cell wall, chloroplasts, plastids, and a central vacuole because these parts are not present in the animals cell. The outer boundary of animal cell is cell membrane whereas the outer boundary of plant cell is cell wall. The plant cell has chloroplast due to its function of making their own food with the help of sunlight so that's why it is not present in animal cell which can't make their own food. Plastid is also absent in animals cell and present in plant cell which is responsible for manufacturing and storing of food. Both plant cell and animal cell has vacuole but different in their size and location in the cell.
Tell me a brief summary of what happens in meiosis
**will mark brainliest**
Meiosis is a special type of cell division, which occurs only in the germ cells during the process of development and maturation to form gametes. It consists of two successive cell divisions,
Meiosis 1 : First meiotic division, that reduces the NUMBER of chromosomes i.e. the parent cell is diploid(46 Chromosomes) and the daughter cells are haploid(23 Chromosome). It also causes genetic variation in the haploid by cross linkage.Meiosis 2 : Second meiotic division (Meiosis II) starts with two haploid parent cells and ends with four haploid daughter cells. Meiosis 2 like Meiosis 1, does not reduce the NUMBER OF CHROMOSOME that means the forming 4 daughter cells are haploid and their number of chromosome remains the same as the parent. BUT Haploid cells that go into the meiosis 2 have MORE AMOUNT OF CHROMOSOME THAN USUAL, thus MEIOSIS 2 REDUCES the amount of chromosome rather than the number of chromosome.The DNA of the primitive germs cells is replicated prior to the meiosis 1 only and there is no replication of DNA before Meiosis 2. The four final cells reulting from the two meiotic divisions are not only haploid(i.e. containing 23 chromosome) but they are also containing 1n amount of DNA so that when the gametes fuse together forming a zygote, both the amount and number of chromosome and DNA remains SAME.
_____________________________________[tex]\huge{\text{Why is Meiosis Important?}}[/tex]Meiosis is essential for the sexual reproduction of eukaryotic organisms because it enables genetic diversity through recombination, and the repair of genetic defects.
It contributes in genetic reassorment which ensures the genetic diversity in the offsprings. The genetic reassortment takes place by following two mechanisms:
During the prophase of meiosis 1, crossing over of genetic material between the homologous maternal and paternal chromosomes takes place which causes exchange of DNA fragments between the chromosome resulting is genetic diversity.During the anaphase of the first meiotic division, there is random distribution of maternal and paternal homologous chromosomes among the daughter cells which are produced as a result of meiotic division._____________________________________Best Regards,'Borz'9. Give an example of a trait and explain how a genetic trait is passed down from parent to offspring in
animals.
Answer:
Inherited traits are passed down to offspring from parents through their genes. Inherited traits are things that are genetic and with an animal from birth. Both of their parents pass these traits to them, and they become a mix of their parents. Hair color, eye color, fur patterns are all examples of inherited traits.
Explanation:
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What part of the cell gives the ribosomes instructions on how to assemble a protein?
Answer:
The nucleus
Explanation:
Answer:
the nucleus
Explanation:
what are some functions of sensory protein?
Answer:
Explanation:
These proteins, known as growth factors, are signals that stimulate cellular functions such as growth, proliferation, healing and differentiation. In the developing human spinal cord, BMPs are required for the formation of neurons.
what are 2 ways to create a biome that will suppoert a cactus needs
Answer:
The second way is to put wet sand with rocks in the sand in the bottom of the bottle, then put dry sand next, get some water and dump it all in there with the plant in it. The advantages in the first one was the plant gets a good amount of water and cactus love water so that is one advantage.
The maintenance of a self-sustaining ecosystem requires a
A.soil that is acidic
B.constant temperature
C.greater numberof herbivores than producers
D.cycling of materials between organisms and their environment
Your class is participating in a population genetic simulation. You and your classmates are the predators and your prey is candy in a jar: chocolate (AA), chocolate and mint (Aa), and mint (aa). Each time you and your classmates eat one candy, your prey reproduces (more candy is added to the jar). After several generations you observe 80% of the prey remaining in the jar is chocolate (AA). What percent of your remaining prey is mint (aa) assuming that Hardy-Weinberg equilibrium is being followed
Answer:
1%
Explanation:
