What is an index fossil?
A. A fossil that contains rocks and minerals
B. A fossil that formed 300 million years ago
C. A fossil that has vestigial structures
D. A fossil found in rocks from one time period

Answers

Answer 1

Answer:

a fossil that is useful for dating and correlating the strata in which it is found.

Explanation:

Maybe D I hope it helps you


Related Questions

What is the molecule that leaves the calvin cycle to be converted into glucose?.

Answers

Answer:

G3P Molecules

Explanation:

The molecules of ADP and NAD+, resulting from the reduction reaction, return to the light-dependent reactions to be re-energized. One of the G3P molecules leaves the Calvin cycle to contribute to the formation of the carbohydrate molecule, which is commonly glucose (C6H12O6).

the term meaning the freeing of a kidney from adhesions is:

Answers

Answer:

Ureteroplasty is surgery to remove the stricture.

Explanation:

HELP NEEDED ASAP! 30 POINTS AND BRAINLYEST TO WHOEVER ANSWERS WITH THE BEST ANSWER! What are 3 examples of gene therapies that are used to treat diseases?

Answers

Answer:

Viruses used in gene therapy are retroviruses, adenoviruses, adeno-associated virus, herpes simplex, and vaccinia. Retroviruses are most commonly used because they can incorporate their genetic material into the host cell’s DNA, thus changing the genetic component of that cell.

Explanation:

Gene therapy is a medical field which focuses on the genetic modification of cells to produce a therapeutic effect or the treatment of disease by repairing or reconstructing defective genetic material. The first attempt at modifying human DNA was performed in 1980 by Martin Cline, but the first successful nuclear gene transfer in humans, approved by the National Institutes of Health, was performed in May 1989. The first therapeutic use of gene transfer as well as the first direct insertion of human DNA into the nuclear genome was performed by French Anderson in a trial starting in September 1990. It is thought to be able to cure many genetic disorders or treat them over time.

Gene augmentation therapy.

Gene inhibition therapy.

Killing of specific cells.

I think this is what you want but i'm only 14 and in 10th so sry if its not

The minimum number of microorganisms necessary to enter the body and establish infection is termed the _______.

Answers

Answer:

it is term to the power of the White blood cells

Please help a girl out !

Answers

Answer:

3=??

5=B

6=C

7=J

8=E

9=G

Explanation:

❤️ sorry I don't know 3 number

a skeletal muscle generates the greatest tension when it is:

Answers

Explanation:

A skeletal muscle generates the greatest tension when it is: partially stretched before being stimulated

Skeletal Muscle generates the greatest tension when the muscle is stretched to an intermediate length, by length-tension relationship.

How tension generates in skeletal muscle?

Muscle tension is highest in skeletal muscles when stretched to an intermediate length, as indicated by the length-tension relationship.

When skeletal muscle fiber contracts, myosin heads link to actin to create cross-bridges, and the thin filaments slide across the thick filaments as the heads pull the actin, resulting in sarcomere shortening and muscular contraction stress.

The amount of stress produced by a muscular contraction is determined by two factors: the number of active muscle fibers and the frequency of neural stimulation of the muscle fibers.

Therefore greatest tension generates in skeletal muscle when it is stretched to the intermediate length.

Learn more about skeletal muscle, here:

https://brainly.com/question/3191239

#SPJ2

A farmer planned to plant 120 seeds in all. After planting 10 more seeds each day than was planned.

Answers

Answer:

120+10x=x

Explanation:

120+10 times the number of days equals answer

HELPPPPPPPPPPPPPPPPPP
A: equilateral and right
B: equilateral and isosceles
C: isosceles and scalene
D: isosceles and right

Answers

Answer:

It's B: equilateral and isoscleles  Explanation: both those words mean triangle with equal sides :)

which of the following cells contain a plasma membrane?

Answers

Explanation:

Like prokaryotes, eukaryotic cells have a plasma membrane (Figure 3.9) made up of a phospholipid bilayer with embedded proteins that separates the internal contents of the cell from its surrounding environment.

Which of the following describes a similarity of the cerebellum and cerebrum?

Answers

Answer:

b. They both have an outer layer made of grey matter and an inner layer made of white matter.

Explanation: is correct

B that’s the answer it’s the answer

what organelle do both plant and animal cells have that control all of the activities that take place inside of a cell?

Answers

Answer:

the nucleus

Explanation:

please help me ill give brainliest <3

Answers

Answer:

1.O=1 H=2

2.C=1 O=2

3.O=2

4.C=6 H=12 O=6

Explanation:

Not sure what the 6 in front of the first 3 mean,maybe you multiple them six times for the question? not sure if it even means something though.

How many carbon atoms does glucose have

Answers

Answer:

six carbon atoms

Explanation:

Glucose has an aldehyde group (-CHO) on carbon atom number one and is therefore called an “aldose,” also it has six carbon atoms (a hexose) so it can be called an “aldohexose.” The reactive group on fructose, however, is a ketone group (-C=0) on carbon number two.

The tiny bones of the middle ear are collectively known as the A. otoliths. B. scala media. C. ossicles. D. stapes.

Answers

Answer:

C. Ossicles

Explanation:

Answer:

The tiny bones of the middle ear are collectively known as the ossicles.

Explanation:

The ossicles (the three tiny bones in the middle ear) are responsible for amplifying sound vibrations from the eardrum.

in DNA, ________ always forms hydrogen bonds with Guanine (G)

Answers

Answer:

in DNA, Cytosine always forms hydrogen bonds with guanine

hope help you

Answer:

cytosine

Explanation:

Which choice has prokaryotic cells?


human blood


cow's liver


onion root


E. coli

Answers

Answer:

E coli.

Explanation:

E coli is a prokaryotic organism, meaning it is comprised of only one cell.

I agree with the person above me

To some extent, sensory receptors in the skin are specialized to detect and register specific stimuli. Please select the best answer from the choices provided T F.

Answers

Sensory receptors in the skin being specialized to detect and register

specific stimuli is True.

The skin is an example of a sense organ found in the body . It contains

receptors which helps to detect and respond to stimuli.  There are

different stimuli such as touch, pressure, pain and temperature

This means that the skin being a sense organ is able to detect and register

specific stimuli as a result of the presence of its receptors.

Read more on https://brainly.com/question/21711165

Answer:

True or False? TRUE

Explanation:

What is the largest portion of the brain?

Answers

Answer:

c. Cerebrum

Explanation: is correct

Where in the cell would you expect to find the greatest activity of the pyruvate dehydrogenase complex?

Answers

Answer:

Mithochondria

Explanation:

In eukaryotes, the pyruvate dehydrogenase complex, like the enzymes for citric acid cycle and oxidation of fatty acids, is located in the mitochondrion, where is associated with the surface of the inner membrane facing the matrix.

In the cell, mitochondria are the place where it expects to find the greatest activity of the pyruvate dehydrogenase complex.

What is the pyruvate dehydrogenase complex?

The three-enzyme complex known as the pyruvate dehydrogenase complex (PDC) is responsible for pyruvate carbonylation, which converts pyruvate to acetyl-CoA.

This complex connects the glycolysis metabolic pathway to the citric acid cycle by allowing acetyl-CoA to be used to perform cellular respiration.

The enzyme pyruvate dehydrogenase catalyzes the reaction between pyruvate and a lipoamide, which yields acetylated dihydrolipoamide and carbon dioxide. The process requires the coenzyme thiamine pyrophosphate.

Therefore, the site where you find the greatest activity of the pyruvate dehydrogenase complex is mitochondria.

To learn more about pyruvate dehydrogenase complex, refer to the link:

https://brainly.com/question/16346028

#SPJ2

According to the text, the main reason that humans are one of the few species to have long, committed relationships is that:

Answers

humans think that they need to connect more than animals for animals it's all about survival making love hard. Animals only think about mating and staying alive. but humans have the time to think about love.  

The main reason that human beings are one of the few species to have long, committed relationships is that: human babies are born before they are completely advanced and for that reason need a number of care.

What defines a species?

Species are characterized by means of the reality that they're reproductively remoted from different organizations, which means that the organisms in a single species are incapable of reproducing with organisms in any other species. The term species also can be described as the maximum fundamental category within the device of taxonomy.

What are the primary predictors of violence?

Many predictors of violent behavior are predictors of different issues, inclusive of substance abuse, delinquency, school dropout, and teenage pregnancy (Dryfoos, 1991; Hawkins, Catalano, and Miller, 1992). The threat of violence is likewise compounded via the number of danger elements concerned.

Learn more about species here: https://brainly.com/question/25939248

#SPJ2

which of these organs is an accessory organ of the digestive system?

Answers

Answer:

Where is the picture??

Explanation:

dna is a double-stranded molecule made up of complementary, antiparallel strands. based on what you know about complementary base pairing, fill in the rest of the details in the figure. drag the labels to their correct positions.

Answers

DNA molecule is composed of nucleotides joined by their extremes. Nitrogenated bases are joined by hydrogen bonds. A Phosphate group is in the 5' extreme, and -OH in the 3' extreme.

------------------------------------

DNA is a polymer composed of different nucleotides joined by their extremes.

Nucleotides are monomers composed of a sugar molecule, joined with a phosphate group and a nitrogenated base.

Nitrogenated Bases

Nitrogenated bases are molecules carrying nitrogen and exhibiting the chemical properties of a base.

Nitrogenated bases are purines and pyrimidines. Adenine and guanine derive from purines, while Thymine and Cytosine derive from Pyrimidines.

Adenine pairs with thymine, while guanine pairs with cytosine.

2 hydrogen bonds join A-T

3 hydrogen bonds join C-G.

Sugar group

The sugar group contains deoxyribose, with hydroxyl modifications.

Sugar is always a pentose.

The free OH group is associated with this ring

It is always associated with the 3' extreme

Phosphate group

There is a P in the center of the group

It is always in the 5' extreme

------------------------------------------

Related link: https://brainly.com/question/20813587?referrer=searchResults

                     https://brainly.com/question/17884307?referrer=searchResults

                    https://brainly.com/question/21368160?referrer=searchResults

Help me label these parts please

Answers

Answer:

1. Cell Body

2. Nucleus

3. Endoplasmic reticulum

4. Mitochondria

5. Dendritic Branches

6. Dendrite

7. Golgi Apparatus

8. Axon

9. Telodendria

10. Synaptic Terminals

Explanation:

I am smart like that :)

What should be done with the contents of
a composter? Explain your reasoning.

Answers

Answer:

Finally, the number of times the pile is turned influences composting speed. By turning more frequently (about every 2-4 weeks), you will produce compost more quickly. Waiting at least two weeks allows the center of the pile to heat up and promotes maximum bacterial activity. The average composter turns the pile every 4-5 weeks.

When turning the compost pile, make sure that materials in the center are brought to the outsides, and that materials from the outside edges are brought to the center.

With frequent turning, compost can be ready in about 3 months, depending on the time of year. In winter, the activity of the bacteria slows, and it is recommended that you stop turning the pile after November to keep heat from escaping the pile's center. In summer, warm temperatures encourage bacterial activity and the composting process is quicker

Using compost in the yard

Incorporate compost into your garden as you prepare the soil in the spring. Cover the area with 3-4 inches of soil and till it in to at least the upper 6 inches of soil. Add compost to soil in vegetable gardens, annual flower beds, and around new perennials as they are planted.

You may also use compost as mulch around flower beds, vegetable gardens, or around trees or shrubs in landscape beds. Apply a 3 inch layer. Be careful not to apply mulch close to the main stem or trunk of the plant.

Explanation:

what is phototropic?​

Answers

phototropic

to grow directionally in response to a light source.

WILL MARK BRAINLIEST
What is the biggest difference (other than their size) between a hot air balloon and a “regular” balloon?

Answers

Hot air balloons float because the air within the balloon is heated by a burner, making it less dense than the air around it, allowing the weight to get lifted from below. Gas balloons may be filled with either helium or hydrogen and use sand as ballast.

Explanation:

in cells regulation allows rapid response to changes in the environment; in cells, gene regulation is critical for maintaining homeostasis.

Answers

Given what we know about biological mechanisms, we can confirm that both of these statements are in fact true in regards to regulation and gene expression.

Homeostasis is the body's ability to maintain constant a series of processes and values that we need in order to survive. To do this, regulation in cells is essential. Regulation allows us to respond rapidly to changes in the environment by regulating the processes which control the homeostasis for that environmental change.

Gene regulation or expression is another way in which the body maintains homeostasis. For example, in the presence of too much substrate, the gene encoding a specific enzyme might activate, causing the creation of the enzyme and getting substrate levels back to normal.

Inversely, if the body detects that substrate levels may be too low, the expression of any gene that may consume that substrate can be silenced, therefore maintaining a balanced level.  

To learn more visit:

https://brainly.com/question/14231089?referrer=searchResults

What is commensalism

Answers

Answer:

an association between two organisms in which one benefits and the other derives neither benefit nor harm.

Explanation:

A relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter

example - one organism using another as a means of transportation

Most of Earth's energy comes from the Sun. Where does the rest come from?
a. internal heat
b. nuclear fusion
c. biomass
d. fossil fuels

Explain

Answers

Answer:

The answer is nuclear fusion

Explanation:

Solar energy is created by nuclear fusion that takes place in the sun. Fusion occurs when protons of hydrogen atoms violently collide in the sun's core and fuse to create a helium atom.

whats the process of (kepler-186f) fusion between these atoms that occurs in all-stars

Answers

Answer: the main element

Explanation: vamp

Other Questions
-2-(3(x+6)-9-(7-x)-3x Mutations may be caused by A. errors in replication B. exposure to radiation C. breakage of chromosomes D. All answer choices are correct GIVING BRAINLIEST PLEASE HELP what is the main reason behind language related problem in Nepal aquaman swim as well as any fish simile metaphors or personification big ideas math homework if marginal cost exceeds marginal revenue, a profit-maximizing monopolist will use the long division method to divide 12024 find the value of x and y Do you agree that the Electoral College is still the mosteffective way to elect the U.S. president in modern times? Do the coil resistances have any effect on the plots? As a department manager, you have decided to purchase two projectors to be installed in two of the conference rooms. Your brother has just started his own business in office supplies. He is able to provide you the two projectors with no installation cost. What might you want to consider? Please provide 4 answers. Witch method of commuting is most likely to reduce your need to go to the gym or get a treadmill explain how corals are affected by tourists I really need help. My teacher isn't here and it's 8 am. My brain needs food too -.- Can someone please help me with these questions? I put them on here and some keep getting taken down. I need help asap!Answer the following questions in complete sentences.Why do you think that you had to use a thin layer of onion skin, rather than a thick layer for the microscope?When iodine reacts with starch, it produces a blue-black color. Starch is a white substance which plants use to store food. What structure did you see better because of the iodine? Why did you see this structure better?From low power to high power, what structures became clearer in the unstained onion tissue?From low power to high power, what structures became clearer in the stained onion tissue?What is the shape of an onion cell? The minute hand on a clock is 15cm long. what area does it pass over in 1 hour (pls show working) Factorize the following Equation and show your work x^{2} - 10x +25 Help pleaseeeeeeeee!!! i need this answer answered for me asap