Why are index fossils useful to scientists?

Answers

Answer 1

Answer:

Fossils are used to determine the ages of rock layers. Index fossils are the most useful for this. Index fossils are organisms that lived over a wide area.  An index fossil allows a scientist to determine the age of the rock it is in.

Explanation:


Related Questions

What occurs after cytokinesis is completed?
O The cell begins to replicate its DNA
OThe cell organizes its microtubules
O The cell enters G1
O The cell enters G2
??

Answers

After cytokinesis is completed, the cell enters into G1 Phase.

Which of the following examples come from renewable natural resources

Answers

Answer:

Milk, Leather, Paper, Cardboard

Explanation:

Milk, leather, paper, and cardboard all come from natural resources for the largest part:

Milk - Cows

Leather - Animal hide

Paper - Trees

Cardboard - Recycled paper

All of the mentioned are renewable because cows can breed, hide can be found on many animals, trees easily grow everywhere, and cardboard is made from recycled paper (which comes from trees).

Uranium, tin, iron, plastic, steel, and gold aren't renewable and (most of them) do not come from natural resources. Uranium is rare and only found in a limited source around the world, as well as other metals (tin, iron, steel, gold). As for plastic? Plastic is not natural nor renewable because it's created by man. All of the above mentioned (besides the answer) also takes thousands of millions of years to degrade naturally.

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Mocha here! If this answer helped you, please consider giving it brainliest because I would appreciate it greatly. Have a wonderful day!

Water is a common compound. It is a compound because it is made up of___ and oxygen.

A. Hydrogen
B. Carbon
C. Sodium
D. Chloride

Answers

Answer:

A

Explanation:

I know this will help :)

The answer is A.hydrogen

1. Which is the correct order of the stages of the cell cycle? *

Cytokinesis, Mitosis, Interphase.

Cytokinesis, Interphase, Mitosis

Mitosis, Cytokinesis, Interphase

Interphase, Mitosis, Cytokinesis

Answers

Answer:

my best guess would be

Interphase, Mitosis, Cytokinesis

Explanation:

Interphase - stage where the cell prepares for Mitosis. During this stage the cell grows and replicates DNA.

Mitosis - part where the chromosomes are separated and are separated into 2 nuclei.

Cytokinesis - part where cells officially splits into two daughter cells.

Cell cycles are events that involve various series of steps for the cell to grow. It follows the order of interphase, mitosis, and cytokinesis. Thus, option D is correct.

What is the cell cycle?

The cell cycle is an important part of the growth and cell division of the eukaryotic cell. It includes interphase comprising the G₁, S (synthesis/replication), and G₂ phase, mitotic phase, followed by cytokinesis and G₀ phase.

The cell spends the majority of its time in interphase where the genetic material undergoes preparations and gets duplicated for the further process. In mitotic division the actual division of the organelles and the nucleic acid takes place.

Mitosis is followed by cytokinesis where the cytoplasm of the cell gets separated to form two daughter cells after the telophase stage. The cell then undergoes the G₀ phase which is the quiescent stage of the cell division where no cell division occurs.

Therefore, option D. interphase, mitosis, and cytokinesis are the correct order of the cell cycle.

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blood enters on the left side of the heart through the_____ and enters the left atrium. Then passes through the_____ to enter the left ventricle 

Answers

Blood enters on the left side of the heart through the pulmonary veins and enters the left atrium. Then passes to the mitral(bicuspid valve) to enter the left ventricle.

Blood is a fluid component of the circulatory system that is very vital for transporting oxygen and nutrients in the body system. It comprises cells suspended in plasma.

The correct answers for the blanks are:

Blank 1: Pulmonary veins

Blank 2: Bicuspid valve

The blanks can be explained as:

The left side of the heart has an atrium that gets the oxygenated blood from the lungs through the pulmonary veins.

Oxygenated blood from the left atrium flows to the left ventricle.

Blood from the left ventricle flows to the aorta that distributes the oxygenated blood to the body parts.

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Why are mountain ranges and polar ice caps not easily classified into a major biome?

Answers

Answer:

Because they are not easily defined in terms of a typical community of plants and animals, mountain ranges and polar ice caps are not usually classified into biomes.

Explanation:

Answer #12 Plz 10 pts

Answers

Answer:

3rd one

Explanation:

Cell > Tissue > Stomach > digestive system!

Which of the following gases DOES NOT trap heat?

A. carbon dioxide
B. nitrogen
C. water vapor
D. methane

Answers

Answer:B

Explanation:

1 point
10. If the grasshopper contains 450 units of energy, then approximately
how many units will the owl receive upon eating the mouse?
O a. 450 units
Ob.45 units
O c. 4.5 units
O d. 0.45 units
PLZ HELP

Answers

45 units I think I remember answering a question like this

The owl will receive 10% or 4.5 units of energy upon eating the mouse.

10% energy Rule:

It states that the enregy is reduced by 90% when move higher from one trophic level to another in an ecosystem.

Here, Groshopper contains 450 units of energy.

Thus, rat gets 45 or 10% energy from the grosshopper on eating.

Therefore, the owl will receive 10% or 4.5 units of energy upon eating the mouse.

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CDC recommendations on antibiotic use include...
•stop taking the antibiotic after you start feeling better
•take all of your prescribed antibiotic regardless of how you are feeling

Answers

Explanation:

the second choice. even if you are feeling better the bacteria may still be there. if you stop taking the antibiotics the bacteria will mutate and become stronger and more immune to the original antibiotics. this could end up deadly

basic unit of a cell membrane

Answers

phospholipids
The cell membrane is not a solid structure. It is made of millions of smaller molecules that create a flexible and porous container. Proteins and phospholipids make up most of the membrane structure. The phospholipids make the basic bag.

oh no
1
Describe the process
occurring in the picture on
the right.
2
Does it require energy?
3. Describe the process
occurring in the picture on the
right.
4. Does it require energy?

Answers

Mind you please answer my phone question ‍♂️ question is the question ‍♂️ question question ‍♀️ why is the question question

The marine biologist from the nursery is planning to develop a large number of new coral polyps with large stinging tentacles. Identify the type of reproduction the marine biologist should use to develop the new coral and explain why this type of reproduction is preferable.

Answers

Answer:

Sexual reproduction.

Explanation:

Sexual type of reproduction used by the marine biologist in order to develop the new coral because variations in an organisms only be done with sexual reproduction. For producing new type of coral, the type of corals should be fused together in order to gain the desire characters in the organisms. So if the marine biologist want coral polyps with large stinging tentacles, sexual reproduction is the only way. From asexual reproduction, the offspring produce identical to parents so that's why we can't use asexual reproduction.

Select all the correct answers.
Alfred has a golden retriever named Max. Max can recognize people from their smell. Max starts to bark and wag his tail when Alfred reaches the gate of his house, even though Max is 50 yards away in his kennel. What are the reasons for Max’s ability to smell so well?
Dogs have more olfactory receptors in their noses, allowing them to identify people by their smell.
Dogs have highly sensitive olfactory receptors, allowing them to distinguish a person’s unique odor.
Dogs have better eyesight than humans, allowing them to see faraway objects.
Dogs have an extended nervous system, allowing them to detect even the slightest movement in humans.
Dogs have connected optic and olfactory systems, allowing them such precision in smell.

Answers

Answer:

A and B.

Explanation:

Answer:

A and B

I hope this helps

A clear sign that a subduction zone occurs in the ocean is the existence of a ______________________. *

Answers

Answer:

Where two tectonic plates converge, if one or both of the plates is oceanic lithosphere, a subduction zone will form. An oceanic plate will sink back into the mantle. Remember, oceanic plates are formed from mantle material at midocean ridges.

Hydrosphere Part 1 / 34 of 46
Which best describes the process of evaporation/transpiration in the water cycle?
O A. Water from the ocean enters the atmosphere as water vapor.
B. Water on the surface of Earth enters the groundwater supply.
O C. Water vapor in the atmosphere returns to the surface of Earth as liquid water.
O D. Water on the surface of Earth and water lost by plants enters the atmosphere as water vapor.
O

Answers

Answer:

D

Explanation:

Because water vapour is a gas and evaporation is the process of turning a liquid into a gas so the water which is the liquid turns into water vapour the gas

Answer:

D

Explanation:

If a cell has 2% sugar inside of the cell, and is placed into a solution with 12% sugar, in which direction will the water mostly travel?​

Answers

Answer:

outside of the cell do to the concentration gradient

Explanation:

Create a story that includes the terms listed below. The purpose of the story is to explain the relationship between photosynthesis and cellular respiration using an example from your life as the basis for the story. The story must be about a plant and animal relationship that you observe in your actual life.
The terms that have to be used are Carbon Dioxide or CO2, Sunlight or Light Energy, Oxygen gas or O2, Chloroplast, ATP, Cellular Respiration, Water or H20, Glucose, Mitochondria, Chlorophyll, Photosynthesis.

Answers

Answer:

Explanation:

I can guarantee you not many people will be creating a whole story for you, but if you make a similar story to how it works then it would be really good. You need to look up how the relationship between photosynthesis and cellular respiration. Then make up a story about something else like 2 animals that were in a similar situation. I hope this helps!

what part of the body can lose up to 40% of the warmth if it's not covered ​

Answers

Answer: The head




Explain

all you need is in the photo ​

Answers

Answer:

It Provides an explanation of how life today could have originated from a single cell.

Explanation:

Which Protects plant and animal cells from outside agents

Answers

A plasma membrane. The plasma membrane lets certain things into the cell that it needs, but keeps other things out.

What type of fingerprint pattern is this?

-plain whorl
-central whorl
-double whorl
-plain arch
-tented arch
-radial loop
-ulnar loop
-accidental

Answers

Answer:

radial loop i think so

have a nice day

i’m confused is it a, b, c, or d

Answers

Answer: I think C, but I could be wrong...

Asexual reproduction (Mitosis) involves only one parent. The offspring of this type of reproduction have?

Answers

Answer:

The offspring of Mitosis will be identical daughter cells because there is only one set of DNA they can get from the parent.

Explanation:

An early winter frost preventing further growth in a tomato garden is an example of a. carrying capacity.
b.limiting factor
c. biotic factor.
d. indirect observation. ​

Answers

Answer:

b. a limiting factor

An early winter frost that stops a tomato garden's growth is an example of a limiting factor, hence option B is correct.

What is the limiting factor?

Anything that limits the size of a population and slows or prevents its growth is referred to as a limiting factor.

Biologic factors including food, mates, and competition with other species for resources are some examples of limiting constraints.

the element that restricts the rate of reaction in any physiological process with lots of variables. the environmental component that has the greatest influence on population size restrictions. Many deer populations are constrained by a shortage of winter forage.

Therefore, winter frost that stops a tomato garden's growth is an example of a limiting factor, hence option B is correct.

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Whats TWO Answer Giving Brainliest To first Correct AnSwEr:D......... HELP PLS

Answers

Answer:

b and c :)

Explanation:

It's gonna be B & C - Stay indoors and protect yourself.

An experimenter wants to observe the growth rate of radish seeds under
different temperatures to see if it affects their growth rate. The
experimenter adds water to each seed and places them under several
different heating lamps. The length of their roots is measured every 6
hours. In this experiment the type of soil used is which variable?
A: control. B:Independent. C: Dependent. D: none of these

Answers

Answer:

D, none of these.

Explanation:

The control group is going to be the radish seeds, they stay the same. The independent variable is the heating lamps and their temperatures. The dependent variable is the seed's growth rates.

Plz Help. Number 22.

Answers

Answer:

D, controlled by earths gravity

Explanation:

I think it’s d but I’m not sure

This type of cloud is thick and puffy on top, and generally flat on the bottom. It has
well-defined edges and can change shape rapidly.

Answers

the answer is a cumulus cloud

This type of cloud is thick and puffy on top, and generally flat on the bottom

is a cumulus cloud.

Theses clouds usually serves as precursors for other types of clouds and are

usually present in the sky at altitudes of around 1000m.

These type of clouds have generally thick and puffy on top appearances.

They also have well-defined edges and can change shape rapidly to other

types too.

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Which factor is the strongest internal influence on one’s feelings and behavior regarding drugs?
personal feelings

the behavior of friends


the behavior of admired celebrities


environmental and family stresses

Answers

Answer:

personal feelings

Explanation:

personal feelings

The factor is the strongest internal influence on one’s feelings and behavior regarding drugs is personal feelings.

What does it mean to be influenced internally?

Since they come from you, internal factors are ones that you can influence. Your thoughts and emotions affect internal factors. These might be advantageous or harmful. Positive thoughts will help you make decisions while negative ones will likely hinder you.

Internal factors include aspirations, preferences, moral standards, and perceptions of societal norms. Community members, family, cultural practices, friends, the media, and technology are examples of external influences.

Primary emotions are those that cannot be reduced to more fundamental feelings but can be combined to create other emotions. These include fear, wrath, humiliation, contempt, disgust, guilt, discomfort, interest, surprise, and joy.

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