Which of the following would be a good example of an index fossil? *

A plant species that lived only in the Amazon Rainforest for 30 million years
A species of lizard found in the Sonoran Desert that lived for 3 million years
A species of dinosaur that lived across all of Pangaea for 50 million years
A species of fish that lived at the bottom of the Pacific Ocean for 150 million years

Answers

Answer 1

Answer:

The last one is correct

Explanation:

Answer 2

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Related Questions

Why can the River Nile be seen from space?

Answers

Because it’s the longest river in the world

how many set of nerves are there in the human body ​

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7 trillion nerves in the human body. All these nerves are part of what's known as your body's nervous system.

PLSSS HELP, the question is what does this represent.

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Answer:

metaphase

Explanation:

Choose the word that best completes each sentence.
Plants are ________. They make their own food.
Animals are ________.
They consume other organisms for food. (20 Points)

Answers

Answer:

Plants are autotrops

Animals are Heterotrops

Hope it helped

All the best!!

can someone please help me

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the correct answer ei letter d

One of the three lines of defense against pathogens is ________?

Answers

Answer:

one of the three lines of defense against pathogens is surface barriers that prevent the entry of pathogens into the body.

Explanation:if its right pls mark brainliest

write down the component of stainless
steel?

Answers

10.5% chromium

less than 1.2% carbon

help :/
first answer gets brainliest, ofc

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El Niño warms waters. La Niña cools waters. Both occur in the Pacific Ocean and both impact the climates.

HELP PLEASE ASAP
Ionic compounds are compounds that___?a) consist of only metallic element. B) have atoms that transfer electrons. C) exists as individual ions. D) all of the about

Answers

Answer:

D

Explanation:

I don't wanna write a full explanation sorry.

What instrument is used to measure the average kinetic energy in a substance? calorimeter thermometer spectroscope voltmeter?​

Answers

Answer:

The instrument used to measure the average kinetic energy of particles in a substance is thermometer. A measure of the average kinetic energy of particles in a substance is temperature

Explanation:

is measured from the outer shoulder socket on outside of arm to crook of elbow​

Answers

Answer:

upper arm is the answer. is it right

Which of the following is NOT a reaction of the
parasympathetic nervous system?
A. Decreased respiration
B. Decreased heart rate
C. Increased blood flow to digestive tract
D. Decreased saliva production

Answers

Answer:

D

Explanation:

D, or decreased saliva production is not a reaction of the parasympathetic nervous system (PSNS) since the PSNS actually increases/causes salivation which helps you digest your food.

As a tip, I usually associate the PSNS with a state of rest/restful conditions, as opposed to the sympathetic nervous system which is the opposite and is associated with stress and high-pressure conditions (like fight or flight).

Hope this helps!! :)

Answer:

D is the correct answer got it right on my assignment!!

Explanation:

What do humans rely on as a source of carbohydrates, since we cannot make them ourselves?

Answers

Answer:

carbohyfrates create energy for the body and our bodies do not produce carbs but you can find it in foods like: bread, pastas, rice

Explanation:

plz mark brainliest

plz help asap! The activity of many cellular enzymes is regulated by activators and inhibitors. Enzyme activity is also regulated in eukaryotic cells by which of the following mechanisms?

Compartmentalization and restricting enzymes to specific organelles or membranes
Secreting enzymes out of the cell
Limiting the availability of substrates
Changing the primary structure of enzymes

Answers

Answer:

compartmentalization and restricting enzymes to specific organelles or membranes

Cellular steroid gradients are produced by the compartmentalization of enzymes into various organelles of a cell, and this might impact how well the various steroid products are balanced. Thus, option A is correct.

What is Compartmentalization?

In biology, the biomembrane, or biological membrane, effectively compartmentalizes enzymes by allowing them to perform only certain functions within a limited area.

The enzymes may be located on the membrane surface or inside the defined compartments.

A percentage of the enzymes would likely not work or their ability to catalyze reactions would likely be insufficient if there was just one cellular compartment.

This is because enzymes catalyzing distinct reactions frequently have variable temperature and pH optimums.

Therefore, Compartmentalization and restricting enzymes to specific organelles or membranes.

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Which cycle involves acid rain

Answers

Answer:

The water cycle involves the circulation of water on, above and below the surface of the earth. Acid rain enters the water cycle through both wet and dry depositions.

Hope this helps! (:

Answer:

the water cycle

Explanation:

I do not understand this. Please help

Answers

Answer:

3 cells,

Explanation: i just know

What reasoning correctly pairs a body system with its relationship to the digestive system?

Group of answer choices

excretory system; transports nutrients from the small intestine to other tissues

respiratory system; obtains oxygen so the energy in nutrients can be extracted

circulatory system; regulates and controls digestive functioning

nervous system; removes wastes from the blood

Answers

excretory system: removes waste from blood.

respiratory system: obtains oxygen so the energy in the nutrients can be extracted.

circulatory system: transports nutrients from small intestine to the othet tissues.

nervous system: regulates and controls digestive functioning.

( Am not completly sure, but i think this is the answer)

whats the structure of the midbrain?

Answers

Answer:

There are three main parts of the midbrain - the colliculi, the tegmentum, and the cerebral peduncles. Of the 12 cranial nerves, two thread directly from the midbrain - the oculomotor and trochlear nerves, responsible for eye and eyelid movement.

Explanation:

I hope  this helps and pls mark me brainliest :)

There are three main parts of the midbrain - the colliculi, the tegmentum, and the cerebral peduncles. Of the 12 cranial nerves, two thread directly from the midbrain - the oculomotor and trochlear nerves, responsible for eye and eyelid movement.

The difference between biotic and abiotic factors are (1 point)
O abiotic is non-living and biotic is living.
O abiotic provide minerals and biotic does not.
Obiotic provide minerals and abiotic does not.
O biotic is non-living and abiotic is living.

Answers

Imagine that you are a scientist who has discovered a new object. You want to find out if the object is biotic or abiotic. You observe several characteristics about the new object. Which of these characteristics would tell you that the object is abiotic, or not alive?

(answer) The object cannot create energy.

The initial rise in the line of the graph is an example of population growth in a species as a result of

(answer)an increase in food supply.

China instituted a “one child per couple” rule to help address which of the following?

(answer) overpopulation

Which of the following describes the difference between biotic and abiotic factors?

(answer) abiotic is non-living and biotic is living

Which is a list of factors that will limit the carrying capacity of a species?

(answer) food supply and habitat space

Explanation:

i just did the quick check UwU

The difference between biotic and abiotic factors is that abiotic means non-living and biotic means living, that is the first statement, as biotic factors refer to living organisms in an ecosystem like plants and abiotic factors include soil.

What is the difference between biotic and abiotic factors?

Biotic factors refer to the living organisms in an ecosystem, such as plants, animals, fungi, and microorganisms, and these organisms interact with each other in various ways, including through predation, competition, and mutualism, while abiotic factors refer to the non-living components of the environment, such as air, water, soil, sunlight, and temperature, which can have a significant impact on the distribution and behavior of biotic organisms within an ecosystem.

Hence, the difference between biotic and abiotic factors is that abiotic means non-living and biotic means living, which is the first statement.

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The Florida Everglades is a large warm wetland with many plants and animals. Which of Earth’s systems interacts with the biosphere in the Florida Everglades?

A.
hydrosphere, geosphere, and atmosphere

B.
hydrosphere, atmosphere and cryosphere

C.
hydrosphere only

D.
hydrosphere and geosphere only

Answers

Answer:

a

Explanation:

Where do electrons go after they leave chlorophyll?

Answers

Answer:

They leave and find somewhere else to replace the previous electron that had left just like it did and repeats the same process over and over again.

Explanation:

This is what i found on the internet to further explain my response, "The electron lost from the chlorophyll a special pair is replenished by splitting water. The passing of the electron in the first part of the electron transport chain causes protons to be pumped from the stroma to the thylakoid lumen." "When light strikes chlorophyll (or an accessory pigment) within the chloroplast, it energizes electrons within that molecule. ... The excited electrons leave chlorophyll to participate in further reactions, leaving the chlorophyll “at a loss”; eventually they must be replaced."

I hope I helped :)

Would appreciate Brainliest ;)

What are the selectively bred animals and plants in the 21st century pls answer I have a project

Answers

Answer:

Selective breeding or it's Animal husbendary

Hope its correct :)

- Ayaan707 for help :) -

In cats, long-hair (H) is dominant to short-hair (h). One cat is heterozygous for its long-hair and its mate has short-hair. First, use a Punnett square to determine the genotypes, phenotypes and probability of their possible offspring.

What is the probability of having a short-haired cat?
A) 0%
B) 25%
C) 50%
D) 75%
E) 100%

Answers

Answer:

C) 50%

Explanation:

When crossed, a heter ozygous long-haired cat (Hh) and a hom ozygous short-haired cat (hh) produces 50% heter ozygous long-haired (Hh) and 50% hom ozygous short-haired (hh)

I would appreciate brainliest, if not that's ok!

What is Metabolism? In a simple answer.

Answers

Answer:

Metabolism is the process by which your body converts what you eat and drink into energy.

The alterations in an organism's or a cell's chemistry. The term metabolism broadly refers to the chemical processes that take place in an organism's cells to support life.

What is  Metabolism?

The word "metabolism" in a cell may be defined as all the chemical processes that take place within the cell to carry out all cellular tasks e.g., growth, development, and reproduction.

Anabolic processes, which often need an input of energy held in the chemical bonds of complex molecules, are distinguished from catabolic events, which typically entail the release of energy and the breakdown of bigger molecules into simpler ones.

These modifications generate the ingredients and energy that cells and organisms require to develop, procreate, and maintain health.

Therefore, metabolism broadly refers to the chemical processes that take place in an organism's cells to support life.

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A sugar farm near the coast of Florida applies a nitrogen based fertilizer to their soil three times a year. When rain falls on these fields after it has been fertilized some of the fertilizer runs off into the ocean causing the nitrogen levels in the water to increase. The increase levels of nitrogen can lead to many ecological effects beginning with the rapid growth of algae. This process is known as eutrophication.

How can eutrophication affect other organisms in the water?

Group of answer choices

The algae provide food for fishes and other organisms, leading to decreased algae populations.

The oxygen in the water is used up as algae is decomposed, reducing the amount available to other organisms.

The water becomes better able to support aerobic organisms.

The extra nitrogen provides additional food for the other organisms, increasing their population.

Answers

Answer:

The algae provide food for fishes and other organisms, leading to decreased algae populations

Explanation:

Excessive nutrients lead to algal blooms and low-oxygen (hypoxic) waters that can kill fish and seagrass and reduce essential fish habitats. ... Eutrophication sets off a chain reaction in the ecosystem, starting with an overabundance of algae and plants.

WILL GIVE BRAINLIST :)
A population of sea urchins in a kelp forest ecosystem is being over-fished. A team of students believe that a decline in the number of sea urchins will affect the organisms in the kelp forest ecosystem. The kelp forest food web below shows the relationships among the organisms in the kelp forest ecosystem.

Answers

Answer:

Explanation:

This response shows some understanding of the question. The ecological relationships among the otter, crab, and urchin are addressed in a very general manner (kelp crabs and sea urchins feed off of kelp, only to be eaten by the sea otter). In a further explanation, the student overstates the effect of a decrease in the populations of the organisms. (The sea urchin and crab won't get the food from the kelp and die off. The otter will starve and die off too.) The supporting details are minimally effective.

3. How does your body ensure that the new cells are the same?

Answers

Answer:

When cells split and increase they do this very important thing in order tonmake the new cells exactly the same as the previous before them. Each cell makes more of all it's genes. Then each one.splits into two with one group of genes in each one of the new cells. During the process they make sure that all are copied correctly.

Earth revolves in what direction

Answers

Answer:

Its rotation direction is prograde, or west to east, which appears counterclockwise when viewed from above the North Pole, and it is common to all the planets in our solar system except Venus and Uranus, according to NASA

Answer:

When viewed above the North Pole, the Earth rotates counterclockwise, from west to east.

30 POINTS PLEASE HURRY!!!
Pulmonary circulation is the key component that supports both respiratory and cardiovascular systems. Examine this diagram of a human heart as seen while looking at the front of the body.

*diagram would be pictured here, but is attached instead*

Which correctly identifies where the blood is flowing to and from?
A: lower body, B: left lung, C: right lung, D: upper body
A: upper body, B: right lung, C: left lung, D: lower body
A: right lung, B: upper body, C: lower body, D: left lung
A: left lung, B: lower body, C: upper body, D: right lung

Answers

Answer:

A: upper body, B: right lung, C: left lung, D: lower body

Explanation:

Answer B

Explanation:

What is the is the difference between the littoral and limnetic zone?

Answers

Answer:

The topmost zone near the shore of a lake or pond is the littoral zone. The near-surface open water surrounded by the littoral zone is the limnetic zone. The limnetic zone is well-lighted (like the littoral zone) and is dominated by plankton, both phytoplankton and zooplankton.

Explanation:

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