Geological periods are defined using index fossils. These fossils are frequently encountered, widely scattered fossils with a small time span. Therefore, option (D) is the correct answer.
What is index fossils?A fossil found in a relatively brief period of geological time that can be used to date the strata in which it is found is called Index fossils.
A relevant index fossil must be unique or easily recognizable, numerous, have a broad geographic distribution, and have a short temporal span. Index fossils serve as the foundation for identifying geologic time scale boundaries and strata correlation.
Therefore, index fossil describes using organisms that were only alive during a specific time period to estimate the unknown age of items.
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what statement forms part of the cell theory
The statement that forms part of the cell theory is "All cells are produced from other cells". The correct answer is option B.
What is cell theory?
The cell theory forms useful principles of biology today. This theory has helped to shape knowledge on how organisms are formed.
The theory described how cells are the building blocks of life. For instance, cells are present in all parts of the human body.
Statements that form parts of the cell theory include:
New cells are created from cells that were existing.Cells are the basic building block in all living things.Living organisms can be unicellular (having one cell) to multicellular (having two or more cells).Cell became possible to be studied with improvement of the microscope and microscopic techniques.
Other cell theory through modern study include:
Energy flow occurs within cells.DNA is passed on from cell to another target cell.All cells have the same chemical composition.In summary, All living things are able to live, grow and reproduce due to the existence of cell.
The complete part of the question is:
What statement forms part of the cell theory?
a. Only plants are composed of plant cells.
b. All cells are produced from other cells.
c. Cells can be produced from nonliving matter.
d. Only animal cells have cell walls.
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Naturally occurring testosterone in the body is composed primarily of which one of
the following:
adrenaline
cortisol
epinephrine
cholesterol
Cholesterol is the precursor of naturally occurring testosterone in the body. It is also biosynthesized with its help.
What are the functions of testosterone?
Testosterone is a sex hormone that has numerous physiological functions. It is thought to control sex drive (libido), bone density, fat distribution, muscle mass and strength, and red blood cell and sperm production in men.
The testicular Leydig cell synthesizes testosterone (T) from cholesterol under the control of the pituitary gonadotropin LH. The gonads produce testosterone, though the adrenal glands in both sexes produce a small amount.
Therefore, testosterone is naturally composed of cholesterol as its primary component.
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If the frequency of homozygous dominant individuals in a population is 0.25, then p = _______.
The Hardy-Weinberg equation used to determine genotype frequencies is: p2 + 2pq + q2 = 1. Where 'p2' represents the frequency of the homozygous dominant genotype (AA), '2pq' the frequency of the heterozygous genotype (Aa) and 'q2' the frequency of the homozygous recessive genotype (aa).
4. A student wants to know if girls have faster reaction times to visual stimuli than boys. Which of the following variables should be the same in all tests
OA The gender of the person taking the test.
OB. The color of the object used in the test.
OC. Both A and B should be the same
OD Neither A nor B should be the same
The color of the object used in the test variables should be the same in all tests.
The correct option is B.
Do you test multiple variables?To ascertain the impact of a modification to one variable, an A/B test must test at least one variable. In a multivariate test, many combinations of factors are tried to see which one is most effective in advancing the end objective.
What is an example of a test variable?It is a factor on which other factors rely. One example of a dependent variable is a test score, which can change depending on a number of factors, such as how much you prepared, how much sleep you got the evening before the test, and even how hungry you were.
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[tex] \huge \color{basic}{ \boxed{ \tt{✐Answer:}}}[/tex]
4. A student wants to know if girls have faster reaction times to visual stimuli than boys. Which of the following variables should be the same in all tests
O A The gender of the person taking the test.
● B. The color of the object used in the test.
O C. Both A and B should be the same
O D Neither A nor B should be the same
________________________________
The correct answer is Letter [tex] \large \bold{B}[/tex]
Which of the following is an example of an instinctive behavior?
O dressing baby girls in the color pink
O pulling on one's earlobe in response to stress or anxiety
infant rooting for a nipple
O a smoker's love of nicotine
You are sorting cards with pictures of organisms and their descriptions into groups. You would place the card with an osprey and the description "organisms that obtain energy by consuming other organisms" with cards for other_____________
The osprey is a predator bird, as it is stated in the description obtain energy by consuming other organisms, this is by definition how heterotroph obtain their resources. Therefore the correct group is option 1 heterotrophs.
Why are sago palms gymnosperm?
How do they achieve fertilization/pollination?
Are they gametophyte dominant, sporophyte dominant, 50/50, or sporophyte only?
Sago palms or Cycas revoluta is gymnosperms because they reproduces through an exposed ovule or seed.
In gymnosperm Pollen from male cones blows up into upper branches, where it fertilizes female cones. Cycas revoluta is a cycad, not an actual palm. Pollination in gymnosperms involves pollen transfer from the male cone to the female cone. during transfer, the pollen develops to form the pollen tube and the sperm for fertilizing the egg.
In gymnosperm ovaries are absent, double fertilization does not take place, As male and female gametophytes are present on cones rather than flowers, and wind is the main source pollination.
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Summarize how energy changes during a chemical reaction as bonds are broken and formed.
When a reaction occurs, bonds in the reactants break and new bonds in the products form. These changes involve energy. When bonds break, energy is absorbed and when new bonds form, energy is released. The bond energy is a measure of bond strength in a chemical bond.
What’s the correct answer answer asap for brainlist
Answer:photosynthesis
Explanation:
A parent cell from a human starts with 23 pairs of chromosomes; how many pairs of chromosomes will be in each new cell following cytokinesis?
Answer:
46 I belive! hope this helps
23 pairs of chromosomes, or 46 chromosomes will be present in the new cells formed after cytokinesis.
The DNA is duplicated during interphase. Consequently, one chromosome is present in two copies.
This indicates that the parent cell now contains 46 pairs of chromosomes.
However, the cell divides into two during cytokinesis, leaving each daughter cell with 46 chromosomes or 23 pairs of chromosomes.
What is Cytokinesis?A single eukaryotic split into two daughter cells during the cell division process known as cytokinesis. After the latter phases of mitosis and meiosis' nuclear division, the process of cytoplasmic division starts. As the daughter cells separate during cytokinesis, the spindle apparatus divides and carries duplicated chromatids into the cytoplasm. Thus, it guarantees that the chromosomal number and complement are preserved from one generation to the next and that, barring exceptional circumstances, the daughter cells will be functional duplicates of the parent cell. Each daughter cell starts the cell cycle's interphase after telophase and cytokinesis are finished.To learn more about Cytokinesis, refer to:
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The birthdate of scientific inquiry is
The scientific inquiry was first used in 17th century but was developed in late 1020s and 1030s.
What is scientific inquiry and when was it originated?Scientific inquiry is the way or would be better to say numerous ways to collect data and evidence on particular topic.And drawing explainations and conclusion on the basis of evidence found in the time period under consideration.See scientific inquiry was made long time ago but is still on the top of the world.Statistically more than 80 percent of the professionals are in the business of finding the evidence and data and processing to draw successful conclusions.Here is the origin , when it was originated in 1020s and 1030s and was invented in the same .To know more about scientific inquiry visit:
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can you explain what the green arrow is pointed at
The green arrow is pointed at the nucleus. Among the options given, the answer will be a multipolar neuron nucleus because the type of nerve cell shown is a multipolar neuron. A multipolar neuron possesses a single axon with multiple dendrites and dendritic branches.
8. in the cladogram below, which letter represents the unique history of organism B?
answer
the unique history of B is represented by B. it is not shared with any other organism
Which of the following would be an example of Codominance?A. Smooth and wrinkled peasB. Red, white, and pink snapdragon flowersC. Different shades of skin colorD. AB blood type
The correct answer is D. AB blood type. Codominance refers to the simultaneous expression of traits encoded by different alleles, therefore, heterozygous display an intermediate phenotype.
A cold biome with cold winters and short, mild summers is aOtropical grasslandO temperate grasslandconiferous forestO chaparral
A cold biome with cold winters and short, mild summers is a coniferous forest.
Many mRNA strands in Eukaryotes will undergo post-transcription modifications (mRNA processing). Which parts of the mRNA strand will code for the final amino
acid sequence?
A Okazaki Fragments
B Exons
C Cap and Tail
D Introns
Correct answer is option B.
Exons are what remain in mature mRNA and ultimately code for amino acids.
What is Exon strand in mRNA?Exons are protein-coding sections of an RNA transcript or the DNA that encodes it. Exons can be separated by introns, which are sections of DNA that do not code for proteins.Exons are gene segments that code for proteins. To create a final product, they are transcribed and translated.Exons are nucleic acid coding sequences that are found in mRNA. Introns are non-coding sequences found in DNA that are removed by RNA splicing prior to translation. Intron sequences change rapidly over time, whereas exon sequences are highly conserved.Each gene has an average of 8.8 exons and 7.8 introns. Approximately 80% of the exons on each chromosome are 200 bp long.
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Which of the following shows an incorrect digestion of a molecule into its components?A. Fat digested into fatty acids and glycerolB. Carbohydrates digested into glucoseC. Protein digested into amino acidsD. Sugar digested into nucleic acids
Introduction to Biology: Biomolecules: Carbohydrates, proteins, lipids, nucleic acids.
The macromolecules such as nucleic acids, carbohydrates, and proteins can form polymers, which means that there is a chain of multiple basic units or monomers.
Proteins are chains of amino acids, nucleic acids are made of nucleotides, and the simplest carbohydrates are monosaccharides such as glucose or galactore.
On the other hand, lipids are very diverse hydrocarbons and include fatty acids, sterols, waxes, phospholipids, monoglycerides, diglycerides, and triglycerides.
Of the options, the one with an incorrect digestion is D, because a sugar or carbohydrate is not made of nucleic acids.
This means D. Sugar digested into nucleic acids would be the correct answer.
1. Connective tissues provide (1 point)
movement
hormones
support and strength
communication and control
Connective tissues provide :
support and strength
Connective tissues bind all the structures together, form a framework and for organs and the body, store fat, protect against disease, and also help repair damaged tissue.
Functions of connective tissues include:
Transportation of nutrients and metabolites through direct diffusion between organs and connective tissue proper.Immunological defense and structural support.Repair of tissues after injurySupportive connective tissue that are bone and cartilage, provide structure and strength to the body and protect soft tissues.
Connective tissue is found in between other tissues almost everywhere in the body including body nervous system. The three membranes that envelop the brain and spinal cord are also composed of connective tissue.
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According to the phylogenetic tree which of the characteristics are not found in Primates A . Twopost-orbital fenestraeB.Hair C.VertebraeD.Amoiotic egg
A typical diapsid skull featuring the two post-orbital fenestrae, or the "openings behind the eye." All members of the group called the Reptilia (see below), except for the anapsids (turtles and their ilk), and a few extinct groups, are diapsids.
Answer: A. Twopost-orbital fenestrae
In active transport, molecules move from an area of low concentration to high concentration, against their concentration gradient.A) YesB) No
In active transport, molecules move from an area of low concentration to another with higher concentration, so they go against the concentration gradient, which means that energy is required to realize this movement.
This means the right answer is A) Yes.
Which of the following characteristics is true of members of the plant kingdom?cell walls made up of cellulosechloroplasts in some of the cellsalternation of generations in life cycleall of these choices are correct
Plants are sessile organisms that can make their own food. Their cells have cell wall that is composed of cellulose and chloroplast that is the main site of photosynthesis. It is also unique to plants the alternation of generations in their life cycle that means it has sporophyte stage and gametophyte stage.
ANSWER: All of these choices are correct.
• What are some different forms of potential energy?
Answer:
chemical, elastic, electrical (electromagnetic), gravitational, nuclear, and thermal energy.
Explanation:
how are Karyotypes, amniocentesis, and the detection of some genetic diseases used in the medical field?
Answer:
Karyotyping is a test to examine chromosomes in a sample of cells. This test can help identify genetic problems as the cause of a disorder or disease.
Amniocentesis is a prenatal test that can diagnose genetic disorders (such as Down syndrome and spina bifida) and other health issues in a fetus.
Genetic testing is useful in many areas of medicine and can change the medical care you or your family member receives. Genetic testing provides a diagnosis for a genetic condition such as Fragile X or information about your risk to develop cancer.
Explanation:
I hope this helps if not sorry~
MENTION 5 IMPORTANCE OF FUNGI IN AGRICULTURE
Fungi are in charge of decomposing organic matter and releasing carbon, oxygen, nitrogen, and phosphorus into the soil and the atmosphere along with bacteria. Many domestic and industrial operations, including the production of bread, wine, beer, and some cheeses, depend on fungi.
Fungi are used by people for a variety of things, including as food and in food preparation. Fungi are also used by people to manage pests. Fungi can also be utilized to create human hormones, citric acid, and medicines. Additionally, fungi are model study organisms.
Most ecosystems depend on fungi as significant decomposers.
Most fungi's main function is to maintain the natural world. Fungi and bacteria both play a crucial role in the soil food web as decomposers. They transform difficult-to-digest organic material into forms that other species can utilise.In addition to producing proteins, carotenoids, and other elements for food, fungus also serve as a source of food. The ability of fungi to ferment fruits and grains into alcoholic beverages, bread, and cheese has been utilized.To know more about Fungi please click here : https://brainly.com/question/10878050
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7. What is the name for a characteristic, such as eye color, of an organism?
Otrait
O gene
Ohybrid
O allele
Traitis the name for a characteristic, such as eye color, of an organism .
In simple terms, what is a trait?A trait is a distinctive attribute, propensity, or trait that someone, something, or both possesses. During those formative months, a lot of our personality characteristics are formed. Humans are naturally creative. More Synonyms for trait: feature, quality, attribute, characteristic.
Height, weight, skin tone, body hair, sexual organs, moles, freckles, eye color, nose shape, ear shape, body shape, physical deformities, mutilations, and other variances like amputations, scars, burns, and wounds are all factors.
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An organism is defined as a living creature with an organized structure, the ability to respond to stimuli, reproduce, grow, and maintain homeostasis, among other characteristics.
Therefore, every animal, plant, fungus, protist, bacterium, or archaeon found on Earth would be considered an organism. These creatures can be categorized in a number of ways.
In a diploid organism, two alleles for a particular gene are expressed and interact to produce physical traits. The observable characteristics that an organism displays are referred to as its phenotype.
What is the name for an organism's attribute like eye color?
The term "phenotype" describes a person's observable characteristics, such as height, eye color, and blood type. Both a person's genotype and environmental variables affect their phenotype.
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Which of the following is a question about biology? (Select all that apply.)
How have rocks in the Grand Canyon changed over the last million years?
How much carbon dioxide does an industry release into the atmosphere each year?
How does water pollution affect fish in a lake?
How has a species of bacteria changed since doctors started prescribing antibiotics?
Why are Earth's poles colder than the equator?
How has a species of bacteria changed since doctors started prescribing antibiotics is a question related to biology.
What are the contents of biology?
Biology is the study of living organisms and their vital processes. Botany, conservation, ecology, evolution, genetics, marine biology, medicine, microbiology, molecular biology, physiology, and zoology are some of the fields covered by biology.
Some bacteria have developed resistance to antibiotics that were once widely used to treat them. For example, Staphylococcus aureus ('golden staph' or MRSA) and Neisseria gonorrhoeae (the cause of gonorrhea) are almost always resistant to benzylpenicillin.
Therefore, bacteria have developed resistance to antibiotics during evolution.
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How could CRISPR help treat genetic diseases like DMD or hemophilia?
CRISPR shut off a deteriorated gene that generate cells of the liver to agitate out transthyretin formed on nerves and heart which brings pain, numbness, and diseases of the heart. CRISPR can be utilized to rehabilitate enduringly the deteriorated DMD gene. A way was formed that can cure individuals with hemophilia possessing mutations of DNA. Hemophilia can only be cured by gene theraphy.
For her school Science Fair, Alyssa designs an experiment to learn more about erosion. Her experimental set up is shown below.
The height of the tray is a change that may cause and affect the experiment.
An independent variable is a variable operated by scientists. In order to ensure fair tests there is only one independent variable in excellent experiments. When scientists change independent variables they record the collected data. No experimental registration group.
It is difficult to determine the effect of independent variables on the subordinate variables. This is because there is always an external factor that affects the behavior of the experimental group. Substantial variables are variables measured or tested in experiments. In a study that examines how individual guidance affects the score of the test, the subordinate variable is the score of the participant's test. This is because it is the measurement target.
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How does meiosis one and two contributed to genetic variation? use the diagram to explain your answer
Meiosis I contributes in genetic variation due to the event of crossing over. On the other hand, Meiosis II results in the formation of four daughter cells that are genetically different.
Meiosis is the process of cell division that changes the ploidy of the parent into half in the daughter cells. It is accomplished in two phases: Meiosis I and Meiosis II. Meiosis I is the reductional division where the actual ploidy is changes whereas Meiosis II is the equational division that leads to the formation of four different daughter cells.
Crossing over is an event that occurs in Prophase I of Meiosis. It is the process of exchange of genetic material between the two homologous chromosomes, one from the father while another from the mother.
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During human development , which process must happen before cell division can take place A blastocyst formationB Fertilization C Embryo formationD differentiation
We can say that the process that must happen before cell division to take place can be listed as following:
B. Fertilization
A. Blastocyst formation
D. Differentiation
C. Embryo formation
So the process that must happen before cell division occurs, is B. Fertilization since after that, there will be another process that implies the multiplication of the cells.
