What are 2 characteristics of index fossils?

Answers

Answer 1
A useful index fossil must be distinctive or easily recognizable, abundant and have a wide geographic distribution and a short range through time. Index fossils are the basis for defining boundaries in the geologic time scale and for the correlation of strata.

hope this helps :)

Related Questions

HELPPP!!! I'm confused!!

Answers

option c

Glycolysis , Krebs cycle , electron transport chain

A farmer wants to produce sweeter grapes using artificial selection. Which of these strategies can he use to achieve this goal?

Answers

Answer:

Crossbreed the two sweetest vines in the vineyard to produce new plants.

Explanation:

Artificial selection is the method used by the humans to produce traits in plants and animals according to teh desired thought. In this process of evolution, desirable characteristics of plants and animals are reproduced.  

In the given excerpt, the farmer can adopt the method of crossbreeding two vines which are sweetest in order to produce sweeter grapes.

Which describes how to calculate density?
mass divided by volume
volume divided by mass
mass added tog volume
volume subtracted from mass
ОО

Answers

Mass divided by volume

Explain the change of color that often occurs in leaves in the autumn in simple terms.

Answers

Answer:

In autumn when it starts to get cold, some plants stop making chlorophyll. Instead, those plants break down chlorophyll into smaller molecules. As chlorophyll goes away, other pigments start to show their colors. This is why leaves turn yellow or red in fall.

Explanation:

2. A food web explains why there are more _____. It is because more energy is available to _____. A. Decomposers than consumers / consumers b. Producers than decomposers / consumers c. Consumers than producers / producers d. Producers than consumers / producers

Answers

Answer:

D

Explanation:

A food web explains why there are more producers than consumers. It is because more energy is available to producers.

The food web is a structural representation of the feeding relationship that exists among the living organisms in a particular environment.

A typical food web groups living organisms as producers, consumers, or decomposers. Producers are those that fix sunlight energy into chemical energy, a process known as photosynthesis while consumers are those that either feed on producers or other living organisms in the environment. The decomposers return both producers and consumers back to the earth and help nutrients circulate in the environment.

In a typical food web, producers are usually more than consumers because more energy is usually available at this level. Less and less energy becomes available as we move up the ladder in each food chain that makes up the food web.

The correct option is D.

where is the gene found?
what's the function of the gene?
what's the structure of the gene?

Answers

Answer:

gene found in the Dna its in the nucleus

‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎ ‏‏‎

Answers

Answer:

answer :

Explanation:

Explanation:

Grace and Carlos are going for a walk the temperature is -15°C with wins at 10 to 12 mph what should I wear

Answers

A snow coat, snow boots, gloves, socks, hat anything to keep u warm

2. What can you infer from the fact that ants make up
20 percent of the mass of all land animals combined?
a. Ants are very heavy
b. Ants live for a long time
c. Ants thrive in locations all over the world
d. Ants breed faster than any other organism on earth

Answers

D, because they are not heavy, so if they form 20 percent of the mass of all land animals combined it means that there are many ants in the world due to the fast breed

Ant breed faster than any other organism on earth, 20% of earth mass have land animals. Many ants are on the earth. Thus, option D is correct.  

What are the major features of ants ?

Ants belongs to Formicide family  which is related to so called eusocial insects like bees and termites. It is appeared in the Cretaceous period that is more than 90 million years ago.

The diversity of ants is every where except Antarctica.

The body has three parts such as  a head, a meso-some and metasoma or gaster.

Ants are mostly omnivorous but can be scavengers , predators or herbivores based on ecological context.

The reproduction in which young, queens  fly during mating time, fertilize with male, this flight is called as nuptial flight.

Then queen lay eggs, then larvae emerge to become pupae, then adults such as workers, soldiers, males or other queens are produced.

Thus, option D is correct.  

Learn more about ants, here:

https://brainly.com/question/932986

#SPJ2

Mitosis vs Meiosis, someone help me with this, ill give brainiest.

Answers

Mitosis: chromosome # stays same in each cell, purpose is to produce more body cells, creates 2 identical sister cells
meiosis: purpose is to produce sex cells for reproduction, creates 4 genetically different cells, chromosome # cut in half in new cells
Both: cell division, dna copied during interphase, start with parent cell
Points of differences between Mitosis and Meiosis:1. Nuclei

Mitosis gives two nuclei, and hence two cells while meiosis gives four.

2. Cells

Mitosis gives identical cells to each other and to the mother cell while meiosis leads to genetic variation due to crossing over and independent assortment.

3.Division

Mitosis includes one division while meiosis includes two.

4. Crossing over

It takes place in Meiosis while absence in Mitosis.

5. Chromosomes

Mitosis produces diploid cells (46 chromosomes) whereas meiosis produces haploid cells (23 chromosomes)

Learn more:

brainly.com/question/5175368

Why is writing on word better than writing on a sheet of paper?

Answers

Answer:

because on paper your hand wrighting is bigger and you go through more sheets and on word it has auto correct and auto save and suggestions

Explanation:

can i have brainlyest

Answer:

Writing in Word is more convenient

Explanation:

Word has a host of text, correction software it suggests proper grammer and spelling and can format your doucument.

HELPP
The diagram below shows the similarities and differences of plants and animals complete the diagram by filling in the correct term as follows: heterotrophic and autotrophic and multicellular

Answers

Answer:

Both are multicellular (plants have different cells for the leaves and the stem, animals have skin cells, brain cells etc so they are called multicellular).

Plants are autotrophic - they make their own food (glucose) by photosynthesis

Animals are heterotrophic - they eat other organisms, cannot make their own food.

Explanation:

A receptor is a set of modified dendrites of the:
a. nerve.
b. interneuron.
c. motor neuron.
d. sensory neuron.

Answers

The answer is A. A nerve

SOMEONE PLEASE HELP ME WITH THIS I REALLY REALLY REALLYYY NEED IT ILL GIVE BRAINLY IF U GET IT RIGHT

Answers

Answer:

i like trains and turtles

Explanation:

I WILL GIVE BRAINLIEST PLEASE HELP, DUE IN 30 MINUTES

Fill in the blanks:
Law of Segregation: Mendelian principle explaining that because each plant has ___ different alleles it can produce __ different types of __. During fertilization, male and female gametes randomly __ to produce four combinations of alleles.

Word Bank: (picture below)

Answers

Answer:

I think it goes like this:

Explanation:

Law of Segregation: Mendelian principle explaining that because each plant has 2 different alleles it can produce 2 different types of genes. During fertilization, male and female gametes randomly pair up to produce four combinations of alleles.

Which option states an advantage of sexual reproduction?

Answers

Answer:

The advantages of sexual reproduction: produces genetic variation in the offspring. the species can adapt to new environments due to variation, which gives them a survival advantage. a disease is less likely to affect all the individuals in a population.

I hope it's helpful!

One definite advantage of sexual reproduction is that it impedes the accumulation of genetic mutations. Sexual selection is a mode of natural selection in which some individuals out-reproduce others of a population because they are better at securing mates for sexual reproduction.

Which gas is released during the light reactions of photosynthesis?
A. Carbon dioxide gas
B. Oxygen gas
C. Nitrogen gas
D. Methane gas



A species of bacteria is found deep within the Earth’s crust. Which process will the bacteria use to obtain energy?
A. Cellular Respiration
B. Photosynthesis
C. Lactic Acid Fermentation
D. Alcoholic Fermentation

Which of the following is not a reactant needed for photosynthesis?
A. Sunlight
B. Oxygen
C. Carbon Dioxide
D. Water

Answers

Answer:

B for your first question.

A for your second question.

B for your third question.

Explanation:

I hope this helps!

The effect of disorder of checkpoints proteins and cell cycle regulation
I need help!!!!!!???

Answers

Answer:

LEARNING OBJECTIVES

Identify important checkpoints in cell division

Explain how errors in cell division are related to cancer

The length of the cell cycle is highly variable, even within the cells of a single organism. In humans, the frequency of cell turnover ranges from a few hours in early embryonic development, to an average of two to five days for epithelial cells, and to an entire human lifetime spent in G0 by specialized cells, such as cortical neurons or cardiac muscle cells. There is also variation in the time that a cell spends in each phase of the cell cycle. When fast-dividing mammalian cells are grown in culture (outside the body under optimal growing conditions), the length of the cycle is about 24 hours. In rapidly dividing human cells with a 24-hour cell cycle, the G1 phase lasts approximately nine hours, the S phase lasts 10 hours, the G2 phase lasts about four and one-half hours, and the M phase lasts approximately one-half hour. In early embryos of fruit flies, the cell cycle is completed in about eight minutes. The timing of events in the cell cycle is controlled by mechanisms that are both internal and external to the cell.

Explanation:

Regulation of the Cell Cycle by External Events

Both the initiation and inhibition of cell division are triggered by events external to the cell when it is about to begin the replication process. An event may be as simple as the death of a nearby cell or as sweeping as the release of growth-promoting hormones, such as human growth hormone (HGH). A lack of HGH can inhibit cell division, resulting in dwarfism, whereas too much HGH can result in gigantism. Crowding of cells can also inhibit cell division. Another factor that can initiate cell division is the size of the cell; as a cell grows, it becomes inefficient due to its decreasing surface-to-volume ratio. The solution to this problem is to divide.

Whatever the source of the message, the cell receives the signal, and a series of events within the cell allows it to proceed into interphase. Moving forward from this initiation point, every parameter required during each cell cycle phase must be met or the cycle cannot progress.

Regulation at Internal Checkpoints

It is essential that the daughter cells produced be exact duplicates of the parent cell. Mistakes in the duplication or distribution of the chromosomes lead to mutations that may be passed forward to every new cell produced from an abnormal cell. To prevent a compromised cell from continuing to divide, there are internal control mechanisms that operate at three main cell cycle checkpoints. A checkpoint is one of several points in the eukaryotic cell cycle at which the progression of a cell to the next stage in the cycle can be halted until conditions are favorable. These checkpoints occur near the end of G1, at the G2/M transition, and during metaphase

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Recessive traits are...


visible in the organism's phenotype as long as TWO recessive traits are present.


visible in the organism's phenotype as long as ONE recessive trait is present.

Answers

I don’t really understand this question can you go more into detail

Deco cubes with 3 types of solutions science

Answers

Answer:

Below

Explanation:

Deco cubes with 3 types of solutions sciences

Answer:

owwwwweeeaaaa my god!

Explanation:

Which food chain represent one way that energy my flow through this ecosystem?

Answers

Answer:

its a metal chain not a food chain, (steel to be more specific)

Explanation:

Answer:

A

Explanation:

How would you define informed consent?
[Type answer here]

Answers

Informed consent is permission granted in the knowledge of the possible consequences, typically that which is given by a patient to a doctor for treatment with full knowledge of the possible risks and benefits.

most common type of arch, loop and whorl?

Answers

Answer:

yes

Explanation:

most common pattern being found in 65 to 70 percent of all fingerprints


The following statement from the video suggests the use of which standard of of science to assess RELIABILITY?

"Simulation experiments can not tell us exactly how life formed in the past, but if
enough of them are done it could eventually tell us if it's possible for life to emerge
from chemistry"

O Replication of Results
O Sufficient Sample Size
O Empirical & Measurable Evidence
O Concept of Falsification

Answers

Answer:

I think it’s C Empirical & Measurable Evidence

Explanation:

...

Answer: c

Explanation:

I took the test

PLEASE ANSWER ALL QUESTIONS! THANKS!

Which of the following statements about salinity is true?
Question 1 options:

Ocean water near areas with low evaporation has higher salinity.


Ocean water in regions with high levels of precipitation has higher salinity.


Ocean water near rivers has a lower salinity.


Ocean water in areas with high humidity has a higher salinity



How are latitude and temperature related?








Question 2 options:

Lower latitudes will have warmer water because it is closer to the equator.


Higher latitudes will have warmer water because it is closer to the equator.


Higher latitudes will have warmer water because it is closer to the poles.


Lower latitudes will have warmer water because it is closer to the poles


How does salinity vary with freezing and melting?









Question 3 options:

Both freezing and melting decrease salinity.


Both freezing and melting increase salinity.


Freezing decreases salinity, while melting increases salinity.


Freezing increases salinity, while melting decreases salinity.


How does salinity vary with evaporation?









Question 4 options:

When water evaporates, it takes salt with it, increasing its salinity.


When water evaporates, it leaves salt behind, increasing its salinity.


When water evaporates, it leaves salt behind, decreasing its salinity.


When water evaporates, it takes salt with it, decreasing its salinity.

Answers

Answer:

that guys answers are all wrong except for #3

Explanation:

i took the quiz and got 1/4

Two plants were being tested for growth. Both were given water and proper soil, etc. However, one was placed in the closet, and one was placed in the window sill. Why did the one in the closet die?

Question 4 options:

It did not have chloroplasts.


It was not around other plants.


It did not receive sunlight.


It was not around people enough.

Answers

Answer:

It did not receive sunlight.

Explanation:

Plants need sunlight to survive along with water and nutrients from the soil.

Four differences between viruses and bacteria​

Answers

Answer:

bacteria :

1. need microscope to see them.

2. need warmth moisture nutrients.

3. saprophyte or parasite.

4. can be harmful or useful.

viruses:

1. smaller than bacteria.

2. spend on living host.

3. always parasite.

4. where is harmful.

Please help me with this

Answers

I’m pretty sure the answer is somatic cell

Estimate the number of cells that belong to each phase of the cell cycle. Then, explain how you made your decision and describe what occurs at each phase of mitosis.

Answers

Answer:

well, it starts from one parent cell, every complete phase makes. at least 4 and then i. think those can multiply

Explanation:

pls help and only answer if you can please

Answers

Answer:

A

Explanation:

I got this by process of elimination because I know all those other answers are wrong

Answer:

I think the answer is A.
Other Questions
PLs HELP !!!!!WILL GIVE BRAINLYSTThe process our cells use to convert broken down glucose into carbon dioxide (CO2) and water (H2O) is called what?Question 3 options:Aerobic RespirationAnaerobic RespirationBreathing RespirationCellular Respiration Your thyroid gland plays an important part in all of the following EXCEPTA. how energetic or tired you feelB. how fast you can runC. how quickly your heartbeatsD. the rate at which your body converts food into energy what does ironic mean Read and answer theJohn: Where were you yesterday?Mary: Why? I was in my French class.John: You weren't in the Spanish class.Mary: Spanish class?John: Yes. There was a test.Mary: Oh no!John: I missed it, too! I was in my Math class.6. Were they in class? *(1 Punto)Yes, they wereNo, they weren'tYes, he wasNo, she wasn't Drag numbers to show which are closest to 1 and 14 on the number line.A number line from negative 1 to 1 in fourths.Closest to 1 Closest to 14 What types of people were attracted to dude ranches such as the GhostRanch?A. Investors and railroad tycoonsB. Industrialists and coal minersC. Artists and those interested in agricultureD. Manufacturers and young students ConiyaThe owner of Wayne's Auto Repair charges acustomer $285 for parts plus an hourly labor cost.The customer paid for 2.5 h of labor and paid a total of$490.What is the hourly labor cost?O $80.00 per hour$82.00 per hour0 $86.00 per hourO $89.00 per hour The Purpose Of Stretching Is : A. To increase your flexibility B.To increase your range of motion during workoutC.To increase blood flow to the musclesD. All of the above pls plz plz i need the answers help me An elementary school class ran 1 mile in an average of 11 minutes with a standard deviation of 3 minutes. Rachel, a student in the class, ran 1 mile in 8 minutes. A junior high school class ran 1 mile in an average of 9 minutes, with a standard deviation of 2 minutes. Kenji, a student in the class, ran 1 mile in 8.5 minutes. A high school class ran 1 mile in an average of 7 minutes with a standard deviation of 4 minutes. Nedda, a student in the class, ran 1 mile in 8 minutes.Required:a. Why is Kenji considered a better runner than Nedda, even though Nedda ran faster than he? b. Who is the fastest runner with respect to his or her class? Explain why. Which are the partial products for 8x362? Select all that apply. What are the major criminal law defenses? A dog breeder has a brown haired dog (Bb) and a white haired dog (bb). If she breeds these dogs, and the mother has a litter of 8 pups, how many should have white fur? "He glides through the water awayfrom the stroke. Oh let him goover the waterinto the reeds to hidewithout hurt. Small and green"I) who does 'He' in the first line stand for? ii) where does he go?iii) what does the poet wish? iv) who chases the snake? v) what is the central idea of this poem? c) A football feels hard on a hot day but feels softer in the evening 5. The operating system has two componentsa. Software and Hardwarec. Shell and Kernelb. Sofd. File (-4z+1) (5z-2)=solution plz. discuss the benefit of walking to an individual Preview the picture above. What is causing the shadow cast upon the ISS?a Clouds from EarthC. The spacecraft hovered aboveb. An astronautA of the above find the value of x and round