Answer:
A .Social Structures
B. Education
D. Access to Medicine
Explanation:
Answer:
A B D
Explanation:
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Silver and gold are common medals used in making jewelry. Why do you think these metals are used?
A. they are ductile and malleable.
B. they have luster.
C. they cannot be dissolved in water.
D. All of above
Answer:
A. They are ductile and malleable
Explanation:
Although they have luster/shine they can be be dissolved in water and in acid so it can not be all of the above. They are malleable so they can be easily be made into jewelry.
What part of the bacteriophage attaches and anchors itself to the bacteria?
Answer: Proteins in the "tail" of the phage bind to a specific receptor (in this case, a sugar transporter) on the surface of the bacterial cell. Entry: The phage injects its double-stranded DNA genome into the cytoplasm of the bacterium.
Explanation:
which factor contributes to climate change the most
What do the arrows represent?
the magnetic field
thermal energy
light energy
the electric field
Answer:
the answer is A
Explanation:
Answer:
A. the magnetic field
Explanation:
Have a nice day/night :D
Which gas is most necessary for plants to do photosynthesis?
A. carbon dioxide
B. nitrogen
C. oxygen
QUESTION :::::
Which gas is most necessary for plants to do photosynthesis?
A. carbon dioxide
B. nitrogen
C. oxygen
ANSWER ::::
carbon dioxide
To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant's leaves, flowers, branches, stems, and roots. Plants also require water to make their food.
Explanation:
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What is one benefit GMO is for the environment?
Answer:
Disease- and drought-resistant plants that require fewer environmental resources (such as water and fertilizer) Less use of pesticides. Increased supply of food with reduced cost and longer shelf life.
If a cell's surface area-to-volume ratio increased from 3:1 to 4:1, what impact would that have on the transport of materials across the cell membrane? It would be unchanged Transport would increase Transport would decrease None of the above
Answer:
The answer to this question is Transport would increase.
Explanation:
The transport would just increase.
In the given area-to-volume ratio, the transport would increase across the cell membrane. The correct option is B.
What is area-to-volume ratio?The surface area to volume ratio is merely the surface area divided by the volume of an entity. It calculates the surface area per unit volume of the object.
The crucial fact is that as the cell size increases, the surface to volume ratio decreases.
If the cell expands beyond a certain size, not really enough material can cross the membrane quickly enough to cater the increased cellular volume.
The surface area divided by the volume is the ratio. This suggests how much surface area is accessible in relation to the size of the cell.
The cell is very large if the surface area to volume ratio is small. If the ratio is large, the surface area exceeds the volume the cell will be small.
Thus, the correct option is B.
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After doing research on plants and fertilizers, a 5th grade science class states the hypothesis for their experiment; "If a plant receives fertilizer, then it will grow to be bigger than a plant that does not receive fertilizer." To test this hypothesis the students must ______________. A) make observations B) collect and record data C) determine and follow a procedure D) make observations, collect and record data, and determine and follow a procedure
Answer:
D
Explanation:
D is a combination of all three options above, and ALL those steps need to be done, so it is D.
If you are ever stuck on a problem and cannot receive help, usually the answer that is "all above" right, but not always.
Air moves through this passage to the lungs.In what body system does it play a role?
A.digestive
B.skeletal
C.endocrine
D.eespiratory
All the organisms in a community, along with all interacting environment factors, form a (n) ________
A. population
B. community
C. large biome
D. ecosystem
Answer:
D ecosystem
Explanation:
A ecosystem is liveing spiecies interacting with thier enviornment together as a system.
Implantation Which of the following sequences correctly describes prenatal development? A. blastocyst implants in uterus, zygote forms, heart begins beating, lungs can breathe air, sex organs become visible B. blastocyst implants in the uterus, zygote forms, heart begins beating, sex organs become visible, lungs can breathe air C. zygote forms, blastocyst implants in the uterus, heart begins beating, sex organs become visible, lungs can breathe air D. zygote forms, blastocyst implants in the uterus, sex organs become visible, heart begins beating, lungs can breathe air 3. Which of the following correrti
Explanation:
A because in the pental development the men and women sex others for there fun and baby in this ara
which ocean zone has the most abundant primary producers and why
Answer:
the epipelagic zone ,due to its high light availability and warm water temperatures.
Which statement describes a main characteristic that separates members of the domain Eukarya from the domains of Bacteria and Archaea? a. Eukarya are able to reproduce. b. Eukarya are able to photosynthesize. c. Eukarya have cells that contain a nucleus. d. Eukarya are made from more than one cell.
Answer: it’s actually D
Explanation:
Main characteristic that separates members of the domain Eukarya from the domains of Bacteria and Archaea is that eukarya have cells that contain a nucleus.
What are Eukarya?Eukarya are organisms with cells which contains a nuclei.
This nuclei or nucleus are membrane bound organelles.
Unlike bacteria, their nucleus is well bounded in a membrane.Therefore, Eukarya have cells that contain a nucleus.
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2 Find the value of X * 5 2/5 4 9 3/5
Explanation:
What is the name of this website or the book?
In which situation is light refracted?
A When light hits a wall
B When light hits a mirror
C When a light wave hits another light wave
D When light travels from air into water
The Demaris family is deciding how to landscape their new home
Answer:
what is the name of this website
or the book?
Which of the following is an example of a private effort to help the environment? *
A. An individual donates money for a park.
B. A business recycles its waste.
C. A nonprofit group buys land for preservation.
D. all of the above
Answer:
The correct answer is - D. all of the above.
Explanation:
Any effort from a private sector made for the preserve or help for the betterment of the environment and ecology. Establishing and making a park will help in increasing plant diversity which increases the air quality of the ecosystem and atmosphere.
An individual donates money for the park. Recycling the waste of a private business is also hep in maintaining the environment. Preserving the land also helps the environment.
Huntington’s disease (HD) is prevalent South Africa. Most of the families with HD have Dutch or British ancestry, which suggests they inherited the European HD allele. HD is believed to have first arrived in South Africa more than 300 years ago when Dutch colonists settled into the Western Cape in the 1600s. Thus, the prevalence of HD in South Africa is the result of the founder effect.
Mutations in the HTT gene cause Huntington’s disease. The HTT gene provides instructions for making a protein called huntintin. This protein plays a role in nerve cells in the brain. The HTT mutation that causes HD involves a DNA segment known as a CAG trinucleotide repeat. This segment is made up of a series of three DNA building blocks that appear multiple times in a row. Normally, the CAG segment is repeated 10 to 35 times within the gene. In people with HD, the CAG segment is repeated 36 to more than 120 times. An increase in the size of the CAG segment leads to the production of an abnormally long version of the huntintin protein. This causes the dysfunction and eventual death of neurons in certain areas of the brain. The more repeats, the more serious the disease is.
HD is inherited in an autosomal dominant pattern. There is both an adult onset (after reproductive age) and a juvenile onset pattern. People with adult onset typically have 40 to 50 repeats, while people with the juvenile form tend to have more than 60 repeats. Individuals who have 27 to 35 repeats do not develop HD, but they are at risk of having children who will develop the disorder. As the gene is passed on to offspring, the size of the repeat may lengthen into the range associated with HD.
Predict what will happen to the allele frequencies for Huntington’s disease in South Africa if there were a new mutation to the HTT gene that causes a reduction to the CAG trinucleotide repeat. Justify your prediction with evidence. Your response should include links to the sources of information gathered.
Explanation:
Predict what will happen to the allele frequencies for Huntington’s disease in South Africa if there were a new mutation to the HTT gene that causes a reduction to the CAG trinucleotide repeat. Justify your prediction with evidence. Your response should include links to the sources of information gathered.
The increased availability of genetically modified food has
A)
made such products commonly acceptable.
B)
eliminated famine in developing nations.
C)
made food cheaper to grow in drought areas.
D)
created controversy in the field of bioethics.
Answer:
B.
Explanation:
This way poorer countries no longer spend so much for so little.
5. Predict long-term changes to the surface landscape of the area if too much water is drawn from the ground and the water table drops further.
Summarize the taxonomic classification system.
Answer:
The taxonomic classification system (also called the Linnaean system after its inventor, Carl Linnaeus, a Swedish botanist, zoologist, and physician) uses a hierarchical model. Moving from the point of origin, the groups become more specific, until one branch ends as a single species.
Explanation:
Answer:
The taxonomic classification system uses a hierarchical model. Moving from the point of origin, the groups become more specific, until one branch ends as a single species.
True or False:Sunlight and the force of gravity are essential components to the water cycle
A. True
B.False
Name two types of a sexual
reproduction which occur in animals
giving one example in each case
Answer:
Meiosis and Fertilization
sexual and asexual reproduction
Compare and contrast suspension feeding and deposit feeding-
Answer:
Suspension feeding involves collecting food particles like small organisms, organic matter, detritus which are suspended in water, often using some form of filtration.
Suspension feeders catch food or organic material from the water using tentacles or spiny arms
where as
Deposit feeding involves feasting on detritus and organic matter that have settled on the ocean floor.
Deposit feeders pass sand, mud, water or sediment into their mouths using mucous-covered tentacles or arms etc.
Explanation:
Suspension feeding ingests the food particles which are suspended in water, while deposit feeding ingests sediments and aquire foods.
What do you mean by Deposit feeders?Deposit feeders may be defined as those aquatic organisms that forage on organic matter that settled down on the bottom.
Suspension feeding maintains the water quality in the aquatic environment, while deposit feeding enhances oxygen level and nutrient cycling.
Suspension feeding occurs similarly to filter-feeding that only ingests suspended particles. While deposit-feeding ingests the deposited particles like detritus, organic matter, etc.
Therefore, it is well described above.
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7. Compare and contrast the way carbon is used in respiration and photosynthesis
.
8. How does carbon get into the ocean?
9. What is carbon used for when it is in the ocean?
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The structure labeled X enables this plant cell toa.Release energyb.Store waterc.Control nuclear divisiond.Manufacture proteins
About the question:
You will find the cell image in the attached files
Answer:
b.Store water
Explanation:
Here we are looking at a vegetable cell. And specifically, the X letter is labeling a vacuole, which we can recognize by its size.
We can find vacuoles either in animal or vegetable cells. They are essential to the correct functioning of the cell.
Now we are going to describe a vegetable cell vacuole.
Usually, they occupy a central place on the vegetable cells. They are big organules, representing almost 90% of the total cell volume. They are the biggest-sized organelle of vegetable cells.
Vacuole formation is thanks to the fusion of many vesicles release by the Golgi complex, and sometimes, with the RER intervention. There are different types of vacuoles according to their function, and many times, a single cell might carry different types of vacuoles. These organelles harbor diverse fluids, among which there are water and enzymes. Eventually, they can also contain solid substances such as proteins, salts, and sugars.
Vacuoles accomplish different functions. The main one is to keep turgor, store waste elements, and substance degradation. Here we are going to focus on the turgor function that involves water storage.
Turgor is a measure of hydrostatic pressure against the cell walls and controlled by these organelles. Vacuoles incorporate substances in their interior such as ions, creating an osmotic environment variable concerning the cytoplasmic one. This environmental variability produces a water flow from inside to outside and vice-versa. The capability of water storage is crucial for vegetable cells.
Energy Efficiency =
Useful Energy Output/Total Energy
Input x 100 (%)
If a power plant uses 100 units of
energy to create electricity and the
output is 5 units, where does the
95% of the energy input go?
A. lost as heat
B. lost as gas
C. escapes the system as potential energy
If a power plant uses 100 units of energy to create electricity and the output is 5 units, 95% of the energy input goes as lost as heat.
Could you ever create a machine where 100% of the input energy would turn into output energy?No, a real machine can't have an efficiency of 100%. An efficiency of 100% means that there is no loss and the output energy (or work) of the machine is equal to input energy (or work). In real machines, there is always some loss of energy to overcome friction and air resistance.
How do you calculate the energy efficiency of a power plant?To express the efficiency of a generator or power plant as a percentage, divide the equivalent Btu content of a kWh of electricity (3,412 Btu) by the heat rate. For example, if the heat rate is 10,500 Btu, the efficiency is 33%. If the heat rate is 7,500 Btu, the efficiency is 45%.
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Protists
Question 1
Give the correct biological term for each of the following:
1. Type of symmetry displayed by Amoeba.
2. Projections of the Amoebe used for locomotion
3. Protective layer found around Amoeba
4. Inner granular liquid medium of the cytoplasm.
5. Organelle that stores digestive enzymes.
6. Structure that stores food
7. Structure that plays an important role in osmoregulation
Answer:
1.Asymmetrical symmetry
2. Pseudopodia
3. Cyst
4. Endoplasm
5.Lysosomes
6.vacuole
7.Contractile vacuole complex (CVC)
State 8 differences between sexual and asexual reproduction
➩Reproduction:
Reproduction is a process by which living organism produce new organisms of same species (of their own kind)
Reproduction is neccessary for the survival and increase in population of species. It ensures continuity of various species on earth. In simple words if organisms will not reproduce there population will decrease and species will become extinct.
➽Mainly there are two types of Reproduction
(i) Sexual reproduction
(ii) Asexual reproduction
➩Sexual Reproduction
→ In sexual reproduction two individuals are involved to produce a new individual (male and female)
→The entire reproduction process takes longer time and more energy.
→ Population increases relatively slowly.
→ It involves more variations.
→ Species can adapt to an environment which changes.
→This leads to evolution.
→ For example:Homosapiens(Human beings)
What allele pairs will result from this combination of alleles MmQq? ( use the 13,14,23,24 strategy).
A). All of these are correct
B). MQ, Mq, mQ, mq
C). Mq, mQ, mq, Mq
D). MM, mm, QQ, qq