Answer:
A. The atom determines the chemical property of an element.
Explanation:
Answer:
A. The atom determines the chemical property of an element.
Explanation:
An atom is made up protons, electrons and neutrons. The atoms valance electrons determine its chemical properties. For example, Na has 1 valance electron. Na just like all other alkali elements lose that one outermost electron to form a cation thus gaining an octet. Because of the one valance electron, alkali elements show metallic property and other chemical properties. If an atom has an unstable nucleus then it becomes radioactive.
Which is a problem associated with a declining population size ?
A. Scarce food supplies
B.Limited health care
C. An aging population
HURRY
A. scarce food supplies
Answer:
An Aging Population
Explanation:
GRADPOINT
cells from a blank organism cannot survive independently
Answer:
This is because these individual cells can independently carry out all the functions ... Moreover, individual cells of multicellular organisms cannot carry out all the ... vessels etc) that carry out different functions for the survival of the organism.
Explanation:
I am the answer giver and this is your answer.
Which of the following statements is true about external and internal fertilization? A. Internal fertilization doesn't require sexual intercourse. B. All animals that lay eggs use external fertilization. C. External fertilization doesn't require sexual intercourse. D. All animals that lay eggs use internal fertilization.
Answer:
The answer is C. External fertilization doesn't require sexual intercourse.
Explanation:
Fertilization is the process by which haploid gametes, sperm and egg, unite to produce a genetically distinct individual.
Fertilization in most of the animals is similar to that in humans. Animals also produce gametes for fusion. But the fusion of gametes may take place inside or outside the body. Based on this, fertilization is of two types – internal and external fertilization.
Internal fertilization
In sexual reproduction, the male inserts the sperms into the female reproductive tract to fuse with the egg. If the fusion takes place within the female parent, it is called internal fertilization.
External fertilization
When the fusion of sperm and egg takes place outside the female parent, it is called external fertilization. Only a minority of organisms exhibit this type of gamete fusion. For example, fish, frogs, etc. Here the female parent deposits her eggs in a place and later, the male parent ejects his sperms over them, then fusion takes place.
Gametes that fuse externally has to face many challenges. Since eggs and sperms are deposited in the external environment, the chances of fusion are very less. Predators may eat eggs and the zygote that is formed. To compensate this loss, organisms like fish and frogs lay hundreds of eggs at a time.
Answer: C external fertilization doesn't require sexual intercourse
Explanation:
On a branching chart showing the evolution of species over time, what does each branch
represent?
Answer
The branching pattern indicates how species evolved from a sequence of common ancestors. The tip of each line or branch indicates a separate species.
Explanation:
match the word to its definition
Answer:
Coal goes under number 4
and Oil goes under number 1
Tatiana buys a bag of fertilizer at the store. It reads 30-15-10. How much phosphorous is in the fertilizer? 30% 15% 10%
Answer is 15%. It goes in order of Nitrogen, Phosphorous, Potassium. (N-P-K).
Answer:
The correct answer is 15%.
Explanation:
In a bag of fertilizer, the letters NPK is written, which signifies nitrogen content, phosphorus content, and potassium content in sequential order. These are the three nutrients that form a complete fertilizer. The content of the nutrients is denoted by numbers, which is followed by a percentage symbol as these numbers signify the percentage of the nutrient in the formation of the fertilizer. Thus, 30-15-10 shows that the given fertilizer comprises 30 percent nitrogen, 15 percent phosphorus, and 10 percent potassium.
Which organism is a primary consumer in this ecosystem?
A - Caterpillar
B - Weasel
C - Grass
D - Fox
(Apex)
The organism that is a primary consumer in this question is A - Caterpillar
Answer:
A. Caterpillar is a primary consumer
Explanation:
Caterpillar is a primary consumer because they feed on a primary producer, in this case grass. The consumers eat producers, primary consumers eat primary producers, on land they are plant eaters, they are herbivores, in this ecosystem for example caterpillar, rabbits, squirrel and mouse.
Weasel and Fox are secondary consumer, they eat primary consumers.
a gene cannot react chemically and form a trait without the proper
- molecule
-enzyme
-substrate
-chromosome
Answer: Enzyme.
Explanation: the absence of any of these essential enzymes will make it impossible for the gene to express the trait for which it is coded.
Answer:
Enzyme
Explanation:
Pleaseeee help me! :)
The peripheral nervous system is the part of the nervous system that consists of the nerves and ganglia on the outside of the brain and spinal cord. So I'm guessing the answer is B
I believe that the answer is B
PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! THIS ONE IS FOR 20 POINTS. I will also give you the brainiest points?!!!!!!!!!!!what cell structure uses aerobic respiration to supply energy to the cell?
During aerobic cellular respiration, glucose reacts with oxygen forming ATP that can be used by the cell.
the cell structure that uses aerobic respiration to supply energy to the cells is called the mitochondria
Daffodils are able to reproduce sexually, using its seeds, and asexually, using its bulb. What is a potential consequence of reproducing asexually?
A.
Over time, the daffodil population will have increased mutations because of decreased genetic variation.
B.
Over time, the daffodil population will have a lower chance of being eaten by a consumer because of increased genetic variation.
C.
Over time, the daffodil population will have a lower chance of surviving in a changing climate because of increased genetic variation.
D.
Over time, the daffodil population will have a lower chance of surviving a new disease introduced to the ecosystem because of decreased genetic variation.
D. Over time, the daffodil population will have a lower chance of surviving a new diseases introduced to the ecosystem because of decreased generic variation.
Over time, the daffodil population will have a lower chance of surviving a new disease introduced to the ecosystem because of decreased genetic variation.
Answer: Option D
Explanation:
Daffodils are able to reproduce sexually, using its seeds, and asexually, using its bulb. Over the time the potential consequence of reproducing asexually is that , the daffodil population will have a lower chance of surviving a new disease introduced to the ecosystem because of decreased genetic variation.
The genetic variation caused due to sexual reproduction induces mutations that help the organism to survive through extreme conditions , whereas when the organism keeps reproducing asexually it does not have any genetic variation and thereby the survival rate becomes minimal.
Number the following diagrams of a first meiosis division in the proper order. Label each phase correctly as prophase 1, metaphase1 anaphase 1 or telephase1.
Metaphase 1, telephase 1, prophase 1, and anaphase 1.
The order of the given diagram is anaphase 1, prophase 1, anaphase 1, and telophase 1.
What is meiosis?Meiosis is a type of cell division that occurs in sexually reproducing organisms and results in a diminution of the number of chromosomes in gametes.
Body cells in humans are diploid, with two sets of chromosomes. These are responsible for the haploid gamete.
During the cell division, centrioles separate in prophase, get aligns at equator in metaphase, split in anaphase and gets separated in telophase.
Thus, in the given image, the first image is showing metaphase 1, second two is prophase 1, image three is anaphase 1.
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How would you feel if someone close to you had yellow fever?
Answer:i would be very scared
Explanation:
Yellow fever is a viral disease of typically short duration. In most cases, symptoms include fever, chills, loss of appetite, nausea, muscle pains particularly in the back, and headaches.Symptoms typically improve within five days.In about 15 percent of people, within a day of improving the fever comes back, abdominal pain occurs, and liver damage begins causing yellow skin. If this occurs, the risk of bleeding and kidney problems is increased.
In 2013, yellow fever resulted in about 127,000 severe infections and 45,000 deaths, with nearly 90 percent of these occurring in African nations. Nearly a billion people live in an area of the world where the disease is common. It is common in tropical areas of the continents of South America and Africa, but not in Asia.Since the 1980s, the number of cases of yellow fever has been increasing. This is believed to be due to fewer people being immune, more people living in cities, people moving frequently, and changing climate increasing the habitat for mosquitoes. The disease originated in Africa and spread to South America with the slave trade in the 17th century. Since the 17th century, several major outbreaks of the disease have occurred in the Americas, Africa, and Europe. In the 18th and 19th centuries, yellow fever was seen as one of the most dangerous infectious diseases.In 1927 yellow fever virus became the first human virus to be isolated.
Which of the following is NOT a way that water is used in a nuclear power station?
question options;
a) Running water cools the rotating turbines.
b) Water cools the steam in the turbine chamber.
c) Steam makes the turbines rotate.
d) Water is changed to steam by heat released by the reactor core.
Answer:
A) Running water cools the rotating turbines.
All life is made of cells, but all cells also have a shared history
Answer:Atoms
Explanation:
A synonym for the word careens in paragraph 3 is
A) drifts.
B) creeps.
C) speeds.
D) splashes.
Answer:
speeds C
Hope This Helps! Have A Nice Day!!
Answer:
Option C, speed
Explanation:
Careen means moving swiftly and uncontrollably in any direction. Drifting means moving slowly from one place to other. Speed in technical term signifies the rate at which a movement is being carried or in other word it signifies the movement of an object rapidly in any direction. Splashes means to strike or hit something.
Thus, out of all the given option the one which closely resembles the meaning of careens is option C speed
The vascular cambium _____.
is part of a plant's secondary growth
produces secondary phloem and xylem tissue
increases in ring size each year
all of the above
a layer of cells in a plant stem from which new tissue grows
Answer: Option B.
Explanation:
The vascular cambium is referred as the main part of the dicot and gymnosperm plant.
Vascular cambium helps in producing secondary xylem and phloem. Xylem is produced inwards, towards the pith and phloem is produced outwards, towards the bark.
Vascular cambium do not support transport water, minerals or food through the plant and also known as main cambium, bifacial cambium, and wood cambium.
Vascular cambium are found in dicots and gymnosperms and not in monocots so it lack secondary growth.
Hence, the correct option is B.
Of the following nonmetals, which is the LEAST reactive?
A. S
B. Cl
C. Br
D. Se
The answer is C.
Hope this helps.
Mark me for brainliest please.
Thank you.
Answer: The least reactive non-metal is Selenium.
Explanation:
Chemical reactivity is defined as the tendency of an element to loose of gain electrons.
Non-metals are the elements which gains electrons and hence, their chemical reactivity will be the tendency to loose electrons.
Their chemical reactivity decreases as we move from top to bottom in a group. As, the electrons get added up in the new shell. So, the the electron in the outermost orbital gets far away from the nucleus. And hence, the electron will be difficult to gain.
Their chemical reactivity increases as we move from left to right in a period because the valence shell come closer to nucleus as we move from left to right. So, addition of new electron in the valence shell becomes easier due to greater attraction between nucleus and valence electron.
For the given options:
Option A: Sulfur
Sulfur (S) is located in period 3 and group 16 of the periodic table.
Option B: Chlorine
Chlorine (Cl) is located in period 3 and group 17 of the periodic table.
Option C: Bromine
Bromine (Br) is located in period 4 and group 17 of the periodic table.
Option D: Selenium
Selenium (Se) is located in period 4 and group 16 of the periodic table.
Hence, the least reactive non-metal is Selenium.
A(n)__________is a change in the base sequence of a DNA molecule
Hi
The answer is called a mutation
Which of the following statements is true about external and internal fertilization?
Answer:
The answer is C. External fertilization doesn't require sexual intercourse.
Explanation:
Fertilization is the process by which haploid gametes, sperm and egg, combine to produce new offspring.
Based on the fusion of sperms and egg fertilization is divided into two types, Internal fertilization and external fertilization.
Internal fertilization:
In internal fertilization the sperms are inserted into female reproductive system where they fuse with egg and zygote is formed.
External fertilization :
In external fertilization, the sperms and egg fuse outside the female reproductive system. Mostly this type of fertilization is found in aquatic organisms like fish and amphibians. The female deposits her eggs at a place and then male ejects the sperms over eggs and then fusion take place.
The true statement is that a) external fertilization doesn’t require sexual intercourse. External fertilization involves the release of sperm and eggs into the environment for fertilization.
Here’s why:
External fertilization occurs when both sperm and eggs are released into the external environment. Fertilization happens outside the organism, such as in spawning.Internal fertilization involves sperm fertilizing the egg inside the female. This can happen through oviparity (egg laid outside), ovoviviparity (egg retained inside), or viviparity (live birth).Not all animals that lay eggs use external fertilization. For example, chickens (birds) use internal fertilization and lay eggs.complete question:
Which of the following statements is true about external and internal fertilization?
A. external fertilization doesn’t require sexual intercoure
B. all animals that lay eggs use extra large fertilization
C. internal fertilization doesn’t require sexual intercourse
D. all animals that lay eggs use internal fertilization
Within a species of short, ground-dwelling animals, two parents produced a group of offspring that were 1 cm taller than they were. These offspring were able to reach slightly higher vegetation than their parents and other members of the species. When the offspring grew up, they produced new offspring who were also slightly taller and could also reach the higher vegetation. This process continued over several generations such that offspring became gradually taller with time.
Eventually, after many generations, all members of the species were at least 20 cm taller than the original two parents that produced the slightly taller offspring. What does this illustrate?
A.
Slight differences between parents and offspring can eventually result in future generations that are very different from their ancestors.
B.
Ground-dwelling animals would survive better if they evolve to be shorter.
C.
Only major differences between parents and offspring can result in future generations that are very different from their ancestors.
D.
Biological change does not apply to ground-dwelling animals.
Answer:
A. Slight differences between parents and offspring can eventually result in future generations that are very different from their ancestors.
Explanation:
B is not correct because the animals were getting taller, not shorter. C is not correct because there were not big differences between the parents and their offspring. D is not correct because in the example the ground-dwelling animals underwent biological change.
Jeremy is conducting an experiment and has just made an educated guess as to what will happen in the experiment. Which step of the scientific method is this?
A. Stating the problem
B. Analyzing data
C. Making a hypothesis
D. Identifying variables
Please help
Answer: C. Making a hypothesis.
Explanation:
Hypothesis is a preassumed supposition or prediction based upon some of the observed facts. The hypothesis is required to be tested by scinetific procedures.
Making a hypothesis is the correct option. As Jeremy is predicting the possible outcome of the experiment.
Transmit impulses away from the cell body? A) axons B) dendrites
Answer:
A = axons transmits impulse away from the cell body
Which is the advantage of waters heat capacity
Answer:
Thanks to its high specific heat, water plays a very important role as a temperature regulator
Explanation:
The specific heat is the amount of heat needed per unit mass to raise the temperature one degree Celsius. The specific heat of the water is 1 calorie / gram. Water is one of the substances with higher specific heat and this is why water plays a very important role as a good temperature regulator.
Water changes its temperature, absorbs or loses a large amount of heat but only changes, either by increasing or decreasing its temperature very little. This property is essential for living beings as it reduces drastic changes in temperature. It also helps that our body does not overheat or over cool since this property helps us maintain thermal balance.
What Latin word related to clouds means “wispy”?
Answer:
cirrus
Explanation:
cirrus means curl in latin and these kind of clouds look like wisps of hair
Final answer:
The Latin word that means 'wispy' and is related to clouds is 'cirrus,' which refers to thin, ice-crystal clouds often seen high in the troposphere with a feathery appearance.
Explanation:
The Latin word related to clouds that means “wispy” is cirrus. Derived from the Latin word for a curl of hair or ringlet, cirrus clouds are characterized by their thin, feather-like appearance. They are usually found high in the troposphere and composed mostly of ice crystals. When viewed in the sky, these clouds can be identified by their wispy strands that are sometimes stretched across the sky by high-altitude winds, giving them a fibrous look that may curve at the ends, akin to a horse's tail.
Which of the following is not a source of carbon for the carbon cycle? (a) shells of marine organisms (b) oil (c) detritus (d) fertilizer
The source not involved in the carbon cycle is (d) fertilizer. The carbon cycle includes proteins like oil, shells of marine organisms and detritus, but fertilizer aids in soil nutrient content and not the carbon cycle directly.
Explanation:The source that is not part of the carbon cycle is (d) fertilizer. The carbon cycle includes the processes by which carbon circulates among the earth's air, oceans, and land. It is exchanged via biological processes like respiration, decay of organisms, and ocean-atmosphere exchange.
Shells of marine organisms (a), oil (b), and detritus (c) are sources of carbon in the carbon cycle. The shells of marine organisms contain calcium carbonate which decomposes after their death to release carbon. Oil is a fossil fuel formed from ancient plants and animals, and thus a carbon source. Detritus, dead plant and animal matter, decomposes, releasing carbon back into the soil.
(d) Fertilizer does not contribute to the carbon cycle directly. It's used to increase the fertility of the soil by enhancing its nutrient content, not contributing to the carbon cycle itself.
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All the given options except fertilizers contribute to the carbon cycle. Shells of marine organisms, oil, and detritus are all sources of carbon, but fertilizers, which are rich in nitrogen, phosphorus, and potassium, do not contribute directly to the carbon cycle. Therefore, the answer is (d) fertilizer.
Explanation:In the carbon cycle, carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere. Carbon is found in various sources such as the shells of marine organisms (a), oil (b), and detritus (c). These sources contribute to the bioavailable carbon, which is ready to be incorporated into biological macromolecules.
Shells of marine organisms contain calcium carbonate, which is a source of carbon. Oil and detritus are also rich sources of carbon. These, when decomposed or combusted, release the carbon into the atmosphere. This carbon is taken up by plants and used for photosynthesis, contributing to the carbon cycle.
However, fertilizers (d) are not a source of carbon for the carbon cycle. Fertilizers are typically rich in nitrogen, phosphorus, and potassium and are used to increase the fertility of soil; they do not contribute directly to the carbon cycle. Therefore, the answer is (d) fertilizer.
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Adaptions and variations show evidence of past ____.
A) Fossils
B) Evolution
C) Diversity
D) Offspring
Answer:
C. Diversity
Explanation: Hope this helps
Please halp!!!! Test due today!!
The temperature of the mesosphere decreases with altitude because it is _____. heated from below by sunlight
heated from above by the sun
heated from below by the ozone layer
cooled from above by the thermosphere
Answer:
:/ B
Explanation:
Answer:
Heated bellow by the ozone layer
Explanation:
Hope this helps :)
If the mRNA reads AGC, what will be the tRNA anticodon?
Answer:
UGC
Explanation:
In RNA, Uracil (instead of Thiamine as is the case with DNA) pairs with Adenine. Cytosine pairs with Guanine like in DNA. The anticodon in tRNA is used to 'detect' the codon in mRNA and therefore bring in the requisite amino acid in the translation complex during translation.
Which mineral scratches Dolomite and is scratched by Olivine?
1.Galena
2.Quartz
3.Potassium Feldspar
4.Muscovite Mica
Please answer!! 10 points!!
Answer:
Option (3)
Explanation:
The above-given question is based on the Mohr's hardness scale, which shows the hardness of the minerals ranging from 1 to 10, where the mineral with hardness 1 is Talc which is a soft mineral, and 10 is Diamond which is the hardest of all the minerals.
Dolomite is a mineral which has a hardness of about 3.5 to 4Olivine is another mineral with hardness 6.5 to 7Galena has a hardness of 2.5 or slightly more than that.Quartz has a hardness of 7Potassium feldspar has a hardness of 6 to 6.5Muscovite mica has a hardness of 2-2.5So from the above data, we can conclude that Potassium feldspar is the mineral which can scratch the surface of a Dolomite mineral and is scratched by Olivine, because its hardness (6-6.5) is more than Dolomite (3.5-4) but lesser than that of Olivine (6.5-7).
Thus, the correct answer is option (3).
By using the Mohs Hardness Scale, we can determine that Quartz is the mineral that can scratch Dolomite and be scratched by Olivine. It has a hardness of 7 while Dolomite and Olivine have respective hardnesses of 3.5-4 and 6.5-7.
Explanation:The mineral that scratches Dolomite and is scratched by Olivine is Quartz. This is determined by the Mohs Hardness Scale, a relative scale that gauges a mineral's resistance to scratching. On this scale, Quartz has a hardness of 7, Dolomite has a hardness of 3.5-4, and Olivine has a hardness of 6.5-7. Therefore, Quartz, being harder than Dolomite, can scratch it, but being softer than Olivine, can be scratched by it.
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