The answer is D, because natural selection is when species adapt in order to live. Giraffes with long necks were able to eat more than those with short necks. Which is why they survived better. There long necks are an adaptation created so they can survive.
Final answer:
Option D best characterizes natural selection, as it describes how giraffes with long necks had a survival advantage in accessing food, leading to greater reproductive success and an eventual increase in long-neck traits in the population.
Explanation:
The best characterization of natural selection among the given options is D: Among a population of giraffes, those with long necks were able to survive better in an environment in which leaves grew only at the tops of short trees. Natural selection is a process described by four main concepts:
Heritable variation within a population.
Overproduction of offspring leading to a struggle for existence.
Differential survival and reproduction, meaning individuals that are better adapted to their environment are more likely to survive and reproduce.
Gradual change in traits within the population over generations as advantageous genes increase in frequency.
In the case of giraffes, they once had varying neck lengths. Due to environmental changes such as drier climates and scarcer leaves, giraffes with longer necks had an advantage in reaching food sources. Consequently, these giraffes were more likely to survive and reproduce, passing down the long-neck trait to offspring. Over time, this led to a population dominated by long-necked giraffes, demonstrating evolution through natural selection.
Which of the following could be true of two different species that have a competitive relationship in the same ecosystem?
A: one species preys on the other
B:the relashionship is mutually beneficial
C:they share the same niche
D.one species benefits while the other is neither helped or harmed
Answer:
I think the answer is C.
Explanation:
If the two are equally competitive, then they will live equally.
- Hope this helped bc honestly that was just from my brain, XD
: ) Good Day.
8. Which of the following can be expressed as a mathematical formula?
A scientific law
B. A scientific theory
C. A hypothesis
D. An observation
B. Scientific law
Explanation-
It’s a statement that explains an idea based upon experimental observations. It’s true based on the fact that they have always been observed to be true. It can be in a form of words and be expressed as a mathematical formula.
Examples would be the law of gravity and Boyle’s law of gases.
Where do scientists often look to find evidence of glacial periods in
Earth's past?
Final answer:
Evidence of past glacial periods is found through Antarctic ice cores and biological indicators like foraminifera, as well as landforms left by ancient glaciers.
Explanation:
Scientists look for evidence of glacial periods in Earth's past by studying various forms of geologic and biological evidence. One of the primary methods is the analysis of Antarctic ice cores, which are long cylinders of ice drilled out from ice sheets and glaciers. These ice cores act as a historical record, preserving bubbles of ancient air and biological materials that provide data on past temperatures and carbon dioxide levels. Additionally, scientists study patterns of ε¹⁸O in the shells of foraminifera, microscopic organisms found in ocean mud, which reflect past ocean temperatures and ice volumes. Furthermore, evidence from ancient glacial landforms, such as those observed by Wegener near the equator, supports the idea of continental drift and indicates that glaciers once covered different parts of the planet.
Is a Cell membrane eukaryote or prokaryotes
Answer:
Explanation: both prokaryotes and eukaryotes contain cell membrane
What do we call worms that occur in the body of another animal
Answer:
we call them pesticides
Help please I’ll make u the brainlest
Answer:
The correct option is B) Photosynthesis.
Explanation:
Photosynthesis can be described as a process in which plants convert carbon dioxide and water into oxygen and glucose by using light energy from the Sun. Photosynthesis is a process that occurs in plants, some algae and cyanobacteria. Hence, option B is correct.
Other options like option C are false because, during aerobic respiration, oxygen is utilized instead of being produced. The process of respiration is opposite to the process of photosynthesis.
Answer:
it is B/2 i hoped it helped , i hope you get your test thing right good luck!!
have a good day - shelby
What is climate change?
A. Decreasing temperatures moly
B. Large-scale changes to weather patterns
C. Natural cycles of cooling and heating
D. Increasing temperatures only
Two unicellular organisms exist, one with a nucleus and one without a nucleus. According to the cell theory, which statement about these organisms is true?
theory, which statement about these organisms is true?
A. Both organisms are able to extract nutrients from available resources.
B. Neither organism can extract nutrients from available resources.
C. The organism without a nucleus can extract nutrients from available resources, and the organism
with a nucleus cannot extract nutrients from available resources.
D. The organism with a nucleus can extract nutrients from available resources, but the organism
without a nucleus cannot extract nutrients from available resources
BECAUSE BOTH THE ORGANISMS EXTRACT NUTRIENT FROM THE AVAILABLE RESOURCES.
B. Neither organism can extract nutrients from available resources.
Explanation:
The organisms without cell and the with the cell can effectively get their nutrients from the available resources in the environment.
The autotrophic prokaryotes they obtain energy from the process of photosynthesis and chemosynthesis, the chenosynthesis prokaryotes is the responsible for chemosynthesis process, in this process the energy is extracted in the form of the oidation of inorganic compounds .
In Eukaryotas the energy sources obtained in the form of the sunlight.
Final answer:
Both prokaryotic and eukaryotic cells can extract nutrients from available resources, despite differences in cellular structure such as the presence or absence of a nucleus.
Explanation:
The answer to the question is based on an understanding of cell theory and cellular structures in different types of organisms. The cell theory states that all living organisms are composed of cells, and these cells are the basic unit of life. Additionally, it states that new cells arise from existing cells. Both prokaryotic and eukaryotic cells are capable of extracting nutrients from available resources, despite the presence or absence of a nucleus. Prokaryotic cells, which lack a nucleus, manage cellular processes in different ways than eukaryotic cells, which possess a nucleus; however, both types are equipped to obtain and process nutrients necessary for survival.
What structure in fish allows for oxygen to be filtered out of water.
Answer:
GillsExplanation:
Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills that are protected under gill covers on both sides of the pharynx (throat).
Answer:
Its Gills
Hope this helps!
In the illustration below, which molecules are represented by boxes A and B? Give answer in order of A, then B.
A) A-chromosomes, B-proteins
B) A-DNA, B-proteins
C) A-RNA, B-chromosomes
D) A-chromosomes, B-proteins
Answer:
The correct answer is B) A DNA B Proteins
Explanation:
Hereditary information is stored in genes are made of A(DNA) controls the production of B(Proteins).
Answer:
A DNA B Proteins
Explanation:
describe how microbial control agent's affects microbes
Answer:
Microbial control agents can be described as agents which will inhibit or prevent the growth of microbes. Hence, they will prevent the damages caused by microbes.
Microbial control agents can either inhibit the growth of microbes. In this way, the population of the microbes will not expand and hence, the effect of the microbe on a host will be controlled.
Other microbial control agents kill the microbes and hence, control the effect of microbes.
Microbial control agents affect microbes by inhibiting cell wall synthesis, protein synthesis, DNA replication, transcription, damaging cytoplasmic membranes, and disrupting metabolic pathways.
Microbial control agents, such as antibiotics and disinfectants, exert their effects on bacteria through various mechanisms. These agents can target and damage critical bacterial structures and macromolecules, leading to the inhibition or death of the microbial cells. Here are six different ways in which these chemical agents can affect bacteria:
Cell wall synthesis inhibition: Some agents prevent the synthesis of peptidoglycan, weakening the cell wall and leading to cell lysis.Protein synthesis interference: Agents can bind ribosomes, inhibiting translation and thus preventing the bacteria from producing essential proteins.DNA replication and repair disruption: Certain antibiotics can bind to bacterial DNA or DNA-processing enzymes, preventing replication and repair.RNA polymerase inhibition: By binding to and inhibiting RNA polymerase, some agents block the transcription process within the bacterial cell.Cytoplasmic membrane damage: Disinfectants may disrupt the integrity of the bacterial membrane, causing leakage of cell contents.Metabolic pathway disruption: Antibiotics may interfere with essential metabolic pathways, such as folic acid synthesis, crucial for bacterial growth.The effectiveness of these agents varies among different bacteria, with some species being naturally resistant or developing resistance over time. Gram-positive bacteria and Gram-negative bacteria may respond differently to various control agents due to structural differences in their cell walls.
During what stage does the DNA copy itself
Answer: Tightly wound chromosomes, composed of DNA, must unwind before replication. Cell replication splits a cell into two parts, both of which become new, fully functioning cells. Before this can happen, however, cells require a full complement of DNA for each of the new daughter cells that will form as a result of the split. Because of this, DNA makes a copy of itself in a process known as replication during interphase, a stage that occurs before cells divide.
Cell Phases: Mitosis is the process by which parent cells each divide into two identical daughter cells. However, this majority of the cell's time is spent in interphase, during which it performs normal metabolic functions necessary for the organism, such as manufacturing protein. DNA occurs during the S phase of interphase, sandwiched between the G1 and G2 phases. The cell uses checkpoint signals to ensure at the end of G1 that it is big enough to replicate and at the end of G2 to determine whether or not DNA replication has succeeded. If so, the cell can undergo mitosis, at which point DNA winds up tightly for easy transport during the process.
DNA Replication: Replication begins with DNA unwinding and unzipping, its two strands coming apart. While only one side is the “correct” code, containing the actual genetic information used to build the organism’s proteins, both can be the base for a new strand of complete DNA. The enzyme DNA polymerase matches up each base with the correlating base: adenine with thymine and guanine with cytosine. When each pre-existing base has been matched to a nucleotide, which also contains the sugar and phosphate of the DNA’s backbone, the strand is complete.
DNA copies itself during the - S phase (Synthesis phase) of Interphase.
Interphase is the metabolic phase of the cell cycle, in which the cell gets nutrients and metabolizes them, grows, replicates its DNA in preparation for mitosis, and conducts other "normal" cell functions.
Cells undergo the Interphase before Mitosis occurs (M phase).DNA replication occurs during the S phase (the Synthesis phase) of the cell cycleThe base-pairing rules are crucial for the process of replication.DNA replication occurs when DNA is copied to form an identical molecule of DNAThus, DNA copies itself during the - S phase (Synthesis phase) of Interphase.
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Justify why the predator/prey relationship is a community level interaction
Answer:
Predator/prey relationship is a type of relationship in the ecosystem that involves a prey that is eaten by a larger animal called the predator. This is an important community level interaction because this balances the population of the ecosystem.
Explanation:
Answer:
It is an interaction between two different species, so the organism, species and population levels are too low. The community level references interactions between members of different species.
Explanation:
22. Explain briefly the 2 roles oxygen plays in cellular respiration
Answer:
It combine with hydrogen and two electrons form water.
It is necessary for our breathing.
Explanation:
Oxygen during cellular respiration is very important.
It combine with hydrogen and two electrons form water.
It is necessary for our breathing. cellular respiration take place effectively in the presence of oxygen and produced more ATP.
There are two types of respiration:
1. Aerobic respiration
2. Anaerobic respiration
Anaerobic Respiration
It is the breakdown of glucose molecule in the absence of oxygen and produce small amount of energy. Alcohol or lactic acid and carbon dioxide are also produced as byproducts.
Glucose→ lactic acid/alcohol + 2ATP + carbon dioxide
Aerobic respiration
It is the breakdown of glucose molecule in the presence of oxygen to yield large amount of energy. Water and carbon dioxide are also produced as a byproduct.
Glucose + oxygen → carbon dioxide + water + 38ATP
How is the water cycle related to the Carbon oxygen cycle
Answer:
The water cycle uses plants for uptake of water and transpiration from the surface, so that water can be sent to the atmosphere.
Carbon cycle uses plants for uptake of CO2, by which it is removed from the atmosphere (and sent back to atmosphere when the plant is dead).
Explanation:
Both the cycles use plants as an integral component. Both the water cycle and carbon cycle use subsurface for long term storage. The water forms groundwater and can be stored for long duration. Similarly, carbon is stored in rocks for long term.
Use the drop down menu to complete each statement about contour lines
How are Ali's segregated in sexually reproducing organisms
Explanation:
During independent assortment in metaphase I of meiosis: chromosomes align independently and alleles (different forms of the same gene)on homologous chromosomes segregate into gametes this occurs independently (either allele goes to a different gamete) to form new combinations of genes.Further Explanation:
All the genetic information within the eukaryotic cell is stored within the nucleus as helical DNA. This DNA is tightly wound around histones as chromosomes. To produce daughter cells during cell division, the chromosomes (total number of chromosomes (2n)) are copied before the cell splits into two daughter cells. This process is known as mitosis, and occurs in cell division and growth processes. Two new nuclei are formed, along with identical cells. These are the same as the parent cell and the chromosome number (2n) is maintained.
In meiosis, the number of chromosomes (2n) is halved through meiotic divisions, producing 4 (n) germ cells or gametes (sperm or eggs), each containing half the number of chromosomes as its parent cell.
crossing over: the exchange of segments of chromosome, between non-sister homologous or similar chromatids crossing over happens at chiasmata, the point where non-sister chromosomes are joined.independent assortment in metaphase I of meiosis: chromosomes align independently and alleles (different forms of the same gene) on homologous chromosomes segregate into gametes independently to form new combinations of genes. ...in humans 2n, n = 23, 8 million combinations of chromosomes possible in gametes.Learn more about mitosis at brainly.com/question/4303192
Learn more about transcription at brainly.com/question/11339456
Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316
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Explain how antibiotic resistance in bacteria provides evidence that supports Darwin’s theory of evolution
Answer and Explanation:
Some pathogens and pests usually survive and reproduce even when they are exposed to the antibiotics and pesticides repeatedly. These instances show that within the population soe individuals possess the gene for resistance or acquire it through mutation hence survives the chemical. Those that survive transmit this characteristic to their offsprings thus establishing a new population of resistant forms.
Which quantity does a light-year measure?
distance
speed
time
volume
A cell that has 14 chromosomes would have —— Daughter cells that each have——— chromosomes after mitosis
A cell that has 14 chromosomes would have 2 diploid Daughter cells that each have 14 chromosomes after mitosis
Mitosis is a type of cell division that takes place in somatic cells. In this process, the parent cell divides into two identical daughter cells with the same number of chromosomes.
The cell undergoes mitosis its daughter cells will have 14. There is no change in chromosome number in mitosis.Thus, A cell that has 14 chromosomes would have 2 diploid Daughter cells that each have 14 chromosomes after mitosis
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Which process drives Darwin's theory of evolution?
natural selection
artificial selection
population diversity
ecosystem diversity
Answer:
natural selection
Explanation:
What is the solution to the problems caused by cell growth
Answer:
Cell division solves the problem of increasing size by reducing the volume of cytoplasm in the two daughter cells and dividing up the duplicated DNA and organelles, thereby increasing surface to volume ratio of the cells.
Which of the following tags should be used to retrieve information from a
database about changes in the height of an ocean surface over a 20-year
period?
O
A. Atlantic Ocean, Indian Ocean, Pacific Ocean
O
B. Volume, density, temperature
O
C. Sea level, Pacific Ocean, 1955 to 1975
O
D. Wind speed, pH, salinity
Answer:
C. is the correct answer. Sea level, Pacific Ocean, 1955 to 1975.
Explanation:
Letter C is the correct link because you are looking for the change in the height of an ocean over a 20 year period of time.
The reason for this is because A only has names of oceans, therefore wouldn't help you find the changes in height or the number of years. B has volume, density, and temperature, but you are not trying to find the mass of the ocean. Finally, D has the wind speed, pH, and salinity, and you are not looking for any of those.
Hope this helps! PLZ Mark Brainliest and friend me, bro! ;)
Answer: c. Sea levels, Pacific Oceans, 1955 to 1975
Explanation:
outdoor survival classes strengthen skills that help students solve complex problems is this a strong claim or weak not a claim
Answer:
Strong: Claim
Explanation:
Hope this helps : )
- What are the reactants of cellular respiration?
Answer: Oxygen and glucose
Explanation:
Answer: oxygen and glucose
Explanation: Oxygen and Glucose are both reactants in the process of cellular respiration. Though the main product of cellular respiration is ATP.
Explain the induced fit of an enzyme reaction including what happens to the substrate after the reaction has taken place
Answer:
The induced fit model explains that the active site of an enzyme changes slightly so that a substrate can fit into it. This is a modification of the lock and key model according to which no changes occurred in the active site of the enzyme.
The induced model explains that the active site undergoes changes to fit the substrate. After the substrate is catabolized or anabolized, it gets detached from the active site. The active site then takes its usual shape back until next substrate arises.
Which best describes the flow of genetic information?
A. Protein to DNA to RNA
B. Protein to RNA to DNA
C. DNA to RNA to protein
D. RNA to DNA to protein
Answer:
DNA to RNA to protein
Explanation:
It states that genes specify the sequence of mRNA molecules, which in turn specify the sequence of proteins.
Select the primary difference between a gas and a plasma?
A ionization of particles
B compressibility
C particle motion
D ability to conform to container
Answer:
A= ionization of particles
Explanation:
Plasma:
" The ionized gaseous mixture consist of atoms, ions and electrons is called plasma"
The plasma was first time identified by William Crookes in 1879. More than 99% universe matter is consist of plasma.
It is the fourth state of matter, the other three are solid, gas and liquid. The most of matter in the universe is plasma. When heat is supplied to the atoms, they gain energy the electrons in atom thus escape from the atom by gaining the energy and create the positive charge. Thus ions are formed. When heat is constantly supplied, the ionization process continue to take place and produce large number of positive charges, free electrons but some atoms not get ionized and remain neutral. Thus a cloud of free electrons , positive charge and neutral atoms is formed which is called plasma.
What did scientists use to come up with a theory about how the universe was created?
Answer:
BIG BANG THEORY. i believe is your answer
Explanation:
It states that the universe is expanding every second. According to the theory the universe is becoming less dense.The big bang theory and the steady state theory are theories about the origin of the universe.
I hope this helps mate :)
Optical Microscopes: Explain the benefits of a higher resolution
Optical Microscope - Resolution
Explanation:
Optical microscope resolution is the shortest length between any two closely located bright points on the specimen which can be viewed clearly by the viewer.
The resolution ability of an optical microscope is specified by how it distinguishes these two airy disk points which are closely placed on the specimen.
In optical microscope, with higher magnification, the image may get blurred or unsharp which can be corrected depending upon its objective. The resolution increases with increase of the numerical aperture of the entire system.
The resolution of an optical microscope is around 200 nm with a magnification power of about 1000. This resolution is less compared to that of an electron microscope .