Which element has the lowest density of all the elements?
Decomposition in pools, ponds, and lakes takes place mostly in the _______ zone. a. pelagic
b. littoral
c. benthic
d. all of the above
Decomposition in pools, ponds, and lakes takes place mostly in the benthic zone.
The benthic zone is the region at the lowest part of water bodies such as lake, stream or ocean which include the floor, the sediment surface and some sub-surface layers. Decomposition mostly occurs in the benthic zone. The benthic zone contains mainly aquatic macro-invertebrates (benthos) such as insects, worms, beetles, clams, and mites which breakdown organic matter that are suspended in the water.
How is cytokinesis different in plants and animals?
A. In plants, a new cell wall forms to split the cell.
B. In animals, the DNA is not duplicated.
C. In animals, there are no sister chromatids.
D. In plants, the DNA is one circular chromosome.
what are two types of evidence that evolution has taken place?
Coal, crude oil, and natural gas are organic compounds. which other process is similar to the burning of these compounds?
a.oxidation of fats during digestion
b.oxidation of iron, also known as rusting
c.oxidation of carbon compounds during cellular respiration
d.oxidation of inorganic matter by microorganisms present in the soil
Volcanoes are usually formed as a result of?
A convergent boundary, where at least one of the plates is oceanic
Hope This helps! feel Free to mark me the brainliest!
Reynaldo is reviewing a study on the effectiveness of a new drug-free remedy for depression. In the study, a group of participants was given a natural supplement for a period of six weeks. They rated their mood both before and after treatment. Two-thirds of the group reported a marked improvement after the trial. What change in this study would do the most to increase Reynaldo's confidence that sound scientific practices were followed? ...?
Answer:
Including the control group that did not receive the supplement.
Explanation:
Without this information we wouldn't know if his experiment was correct or not. Hope This Helps:)
Final answer:
To increase confidence in the study’s results, a control group receiving a placebo should be included, and participants should be randomly assigned to either the supplement group or the placebo group to rule out placebo effects.
Explanation:
Reynaldo is reviewing a study on the effectiveness of a new, drug-free remedy for depression. To increase confidence that sound scientific practices were followed in the study, one significant change that could be made is the inclusion of a control group that receives a placebo. By comparing the group that gets the natural supplement with a control group that receives an inert substance, researchers can ascertain whether the improvements are due to the supplement itself or to placebo effects. Setting up the study in such a way each participant would have an equal chance of being in either group, which is known as random assignment, can further enhance the validity of the study. This design helps rule out the possibility that improvements are due merely to the participants' belief they are receiving an effective treatment.
Examine the photo of Quartz below. In which way does Quartz break?
A. Cleavage
B. Fracture
C. Luster
D. Flat planes
Final answer:
Quartz breaks with a fracture, leading to irregular and uneven surfaces, unlike cleavage which results in smooth and flat surfaces.
Explanation:
The photo examination of Quartz should highlight that Quartz breaks with a fracture. This indicates an irregular breakage pattern, which usually occurs along mineral planes without any weak atomic bonds, resulting in non-flat surfaces. Unlike cleavage, which produces smooth, flat, and often parallel surfaces as a result of weaker atomic bonds in the crystal lattice, fracture surfaces are uneven and irregular because the bonds across these surfaces are of relatively equal strength.
Understanding the fracture patterns of minerals like Quartz is crucial for mineral identification and geological analysis. By distinguishing between fracture and cleavage, geologists can interpret the structural properties and formation history of mineral samples with greater accuracy, aiding in various scientific investigations and practical applications.
what is the purpose of ovulation
Cells use __________ to take in large molecules or other cells.
active transport by endocytosis
passive transport by osmosis
active transport by carrier proteins
passive transport by diffusion
There are 64 codons and 20 amino acids. Which of the following is not true?
A. Several different codons can specify the same amino acid.
B. The AUG codon, or methionine, is the start codon.
C. All amino acids are linked to a codon.
D. Each amino acid is specified by only one codon.
Answer: The option that is not true is D) Each amino acid is specified by only one codon.
Codon can be defined as the sequence of three nucleotides ( present in DNA or mRNA) that corresponds to a particular amino acid. It helps in the process of translation as different amino acids ( that are linked to codons) are assembled to give a particular protein according to the sequence of codon.
There are 64 codons and 20 amino acids that make up the proteins present in the living systems. This indicates that several different codons can correspond to the same amino acid.
For instance, amino acid Valine is coded by four codons that is GUC, GUG, GUA, GUU.
Thus, option D) is incorrect.
if an organism had a mutation in a gene that codes for a ribosomal protein, which of the following would be affected
A. DNA Replication
B. Transcription
C. Translation
D. Gene expression
The answer would be C, Translation
The first amino acid inserted into a new polypeptide chain in eukaryotic cells is always _____.
Where are the longest continuous mountain ranges on earth located?
Along the ocean floor
Why is it important to use the same restriction enzyme on DNA from the two organisms?
Which animal has gills for respiration?
A.
salmon
B.
frog
C.
grasshopper
D.
robin
Your answer is A. salmon. Fish do not have gills and salmon are fish
describe the benefits to using tissue cultures to study medications used for treating cancer cells
The correct answer is:
Medications can be tested on cell cultures instead of being injected into patients unnecessarily. Cancer cells continue to grow in the cultures uncontrollably allowing scientists to test multiple medications on the cancer cells. Specific treatments that are shown to fight the growth of cancer cells in the culture can be used on patients. Cultures are safer to use than injections of unneeded medications into patients.
I’m sure that’s right. Hope it helps!
Microtubules, microfilaments, and intermediate filaments make up the _____, which lies beneath the plasma membrane and provides support, movement, and shape for the cell.
A) cell wall
B) cytoplasm
C) cytoskeleton
D) Golgi complex
Answer:
Option C, Cytoskeleton
Explanation:
Cytoskeleton is made up of following structure -
a) Microtubules - it is the largest part and help in organelle transport
b) Actin filaments
c) Intermediate filaments
d) and several proteins to support this system
These three components give shape to the cell and also keep all the internal parts of the cell intact.
They also support cell in movement
Cytoskeleton play a supportive role in cell division as well
Hence, option C is correct
which is a disadvantage of using genetic engineering
Answer:
Genetic engineering refers to a process, which permits the alteration of the structure of the genes. It is a deliberate change that takes place via the direct change of the genetic substance of an organism. In the process, DNA is either eliminated or supplemented to generate one or more novel traits, which were not witnessed in that organism before.
Genetic engineering is here to make a change. Some of these modifications are positive, that is, developing healthier foods. However, some of these changes can be negative and unanticipated. Generating a plant more tolerant to drought may also make that plant less tolerant of straightforward sunlight. Animals can be modified to generate more amount of milk, however, they exhibit a reduced lifespan at a similar time, thus, and farmers can suffer greater livestock.
Genetic engineering, though promising, has significant disadvantages. These include unpredictable side effects, potential exacerbation of societal inequality, and the risk of reduced genetic diversity.
Explanation:One major disadvantage of using genetic engineering is the potential risk of unpredicted side effects. Though genetic engineering can provide many benefits such as modified crops or improved disease resistance, manipulating the DNA of an organism can have unforeseen and potentially harmful consequences in the long run. These effects could impair the genetically modified organism, or spread to the surrounding ecosystem, causing ecological imbalance.
Another disadvantage is that genetic engineering could perpetuate inequality. The application of genetic engineering in human beings could lead to a situation where those who can afford it will have access to genetic modifications for improved health, longevity, or even physical or intellectual enhancements. Those who cannot afford such modifications could be left behind, widening already-existing gaps in society
Lastly, genetic engineering runs the risk of reducing genetic diversity. By preferring certain traits and engineering them into organisms, we risk creating a population with similar genetic traits, which might decrease its evolutionary potential and thereby its long-term survival chances.
Learn more about genetic engineering here:https://brainly.com/question/34831453
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Which one of the following is the catalyst in a metabolic pathway?
A) Carbohydrates
B) Phosphate groups
C) Enzymes
How do single-celled decomposers get energy?
Answer:
They break down dead organisms
Explanation:
Oxygen has an atomic number of 8. The n = 1 energy level has two electrons, and the n = 2 energy level has six electrons. Oxygen's valence is _____.
Protocells are capable of ____________________.
a.
fermentation
c.
respiration
b.
photosynthesis
d.
growth and division
Answer:
The correct answer is option d.
growth and division
Explanation:
Hello!
Let's solve this!
The protocell are cells that were created before the cells as we know them today. They are structures that include organic polymers. They are also self-replicating, this means that they can grow and divide.
We conclude that the correct answer is option d.
growth and division
The particle that determines the identity of an element is the
a. proton.
b. photon.
c. neutron.
d. electron.
Why is water essential to life on a chemical level?
Cystic fibrosis is genetic, meaning it can be passed from parent to child. What type of mutation causes cystic fibrosis? somatic mutation germline mutation silent mutation
Answer: Germline mutation
A germline mutation is a mutation in the fully developed germ cells (sperm and ovum). These defective mutated cells fuse to form zygote. The zygote rapidly produces all somatic and germline cells in the offsprings which are also mutated. Therefore, mutation is transmitted from parents to offsprings. Cystic fibrosis is a result of germline mutation. This disease is hereditary in nature passes from parents to the offsprings. If a child receives CFTR (cystic fibrosis transmembrane conductance regulator) mutated gene from both the parents than the child will be affected by the symptoms of this disease. If the child receives a single copy of CFTR gene from either of the parent than the child will be the carrier of disease.The mutated gene may be present in the germline cells of the parent or on all the body cells.
Answer: B: Germline mutation
Explanation: Edge 2022
Anything that has mass takes up whose particles are in constant motion
Which waves are electromagnetic and can travel through a vacuum?
Light and heat waves
Longitudinal and transverse waves
Sound waves < I think
Surface waves
Answer: The waves that travel through a vacuum is, light and heat waves.
Explanation :
Electromagnetic waves: These are waves which can travel through vacuum. These have electrical and magnetic component associated with them. They travel with the speed of light. They does not require a medium to travel. For Example: Infrared waves, Microwaves, light waves, heat waves.
Mechanical waves: These are the waves that require a medium to travel so that they can transport their energy from one location to another. For Example: Sound waves, surface wave.
Surface wave : It is defined as a seismic wave that travels along or parallel to the earth's surface.
Longitudinal and transverse waves are also require a medium to travel.
Hence, the waves that travel through a vacuum is, light and heat waves.
Which of the following would not help an animal live in the desert?
1.Having thin, moist skin – skin constantly covered in a film of water
2.Estivation – burrow underground and wait for agreeable conditions
3.Hygroscopic skin – absorb water through the skin
4.Being nocturnal – active during the night
a. carbohydrate c. protein
b. lipid d. nucleic acid
____ 1. fats, oils, waxes, and steroids
____ 2. insulates and makes the phospholipid bilayer
____ 3. made of C, H, and O in a 1:2:1 ratio
____ 4. made of amino acids
____ 5. made of long chains of C and H bonded together
____ 6. made of C, H, N, and O
____ 7. DNA and RNA
____ 8. basic unit has an R group as one of its components to determine its traits
____ 9. basic unit is a nucleotide
____ 10. made of simple sugars (end in “ose”)