Which of the following is true?
a. Extinctions of past species has happened gradually and on a small scale.
b. Bacteria represent a newer form of life, not present during the early prehistory of Earth.
c. Most organisms present early in Earth's prehistory were more complex than modern organisms.
d. Species on Earth today are but a fraction of all species that ever lived.
e. The number of species existing at one time has decreased throughout history.

Answers

Answer 1

Answer:

D

Explanation:

So many species on the Earth have gone extinct throughout it's years. Many species have died out over the 4.543 billion years that the earth has existed, and new species are introduced throughout the decades whilst some fade out.


Related Questions

what is the formula for net primary productivity​

Answers

Gross Primary Production or GPP minus the carbon that is lost to respiration

Explanation:

NP = GPP - RESPIRATORY LOSS

what did Rudolf virchow discovered?

Answers

Answer:

Explanation:

In 1855 Virchow published a statement based on his observations Omnis cellula e cellula, which means that all cells arise from pre-existing cells. This was not a new theory.

Changes that Affect the body may take place where

Answers

Explanation:

All vital organs begin to lose some function as you age during adulthood. Aging changes occur in all of the body's cells, tissues, and organs, and these changes affect the functioning of all body systems.

Put the following biological structures in the correct order of organization, from smallest to largest:
A. Gills, pillar cells, lamellae, fish, respiratory system
B. Pillar cells, lamellae, gills, respiratory system, fish
C. Pillar cells, lamellae, gills, respiratory system, cat
D. Lamellae, gills, respiratory system, fish, pillar cells

Answers

Answer:

B

Explanation:

Cats Dont have gills so rule out C. The body has to be the end so it would be B starting from Pillar cells to fish

Biological structures are arranged based on the level of the organization. The order of organization from smallest to largest is pillar cells, lamellae, gills, respiratory system, and fish. Thus, option B is correct.

What is the level of organization?

The level of organization is the arrangement of the structures based on the level of complexity. It starts from the most simple to the most complex structures. It starts with an atom and ends in an ecosystem.

Pillar cells are the simplest level that comprises the fundamental unit made of molecules. They together make the tissues or the lamellae in the fish. The tissues or the lamellae group together to make the organ and gills.

The gills combines with the other organs to make the organ system like the respiratory system, which together with various organ system makes the fish the makes a complete organism.

Therefore, the order of the organization starts with pillar cells and ends at fish.

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How carbonic acid formed and what is its role in chemical weathering

Answers

Answer:

Carbonic acid is formed in small amounts when its anhydride, carbon dioxide (CO2), dissolves in water. Carbonic acid is a very common in nature where it works to dissolve rock.

Explanation:

Mountain ranges are created at boundaries between tectonic plates a. b. transform transflux divergent convergent C. d. 5​

Answers

Convergent would produce mountains because they approach eachother

Select all that apply.
Pathogens
are disease-causing microorganisms
cannot be treated
can be fatal
m are only bacteria
SUBMIT ANSWER
ASK FOR HELP

Answers

Pathogens are:
Diseases-causing microorganisms
Can be fatal (just some of them)
Are only bacteria (there are some nonpathogenic bacteria that lives in the large intestines but 90% are just bacteria, viruses and fungus which bring diseases to its host)
They can be treated with antibodies

List 3 variable that Anurag should keep the same

Answers

Answer:

seawater ,upside-down funnel and seaweed

Explanation:

The process of diffusion of solvent particles from the region of less solute Concentration to a region of High solute Concentration through semi-permeable Membrane is known as​

Answers

Answer:

The process of diffusion of solvent particles from the region of less solute Concentration to a region of High solute Concentration through semi-permeable Membrane is known as (osmosis)

What is the purpose of the subheadings?

Answers

Answer:

Its purpose is to pull readers further into your content so as to stay long enough to realize how stellar the information and writing are and not only continue reading but return for new content as it is posted. What the headline does for the post, the subhead does for each individual section of content

Explanation:

Answer: the purpose of subheading are to tell you about what you will be reading about in the paragraph to sentence

Explanation:

If a cell membrane were completely permeable to all substances, could the cell continue to live? Explain your answer in depth.

Answers

If the membrane were fully permeable to all substances, then anything could enter the cell. This would upset the balance between the cell's contents and the outside environment. There is only so much ability to store substances and utilize substances, therefore, the cell would not be able to maintain homeostasis.

Plant cell under a microscope

Answers

Answer:

Under the microscope, plant cells are seen as large rectangular interlocking blocks. The cell wall is distinctly visible around each cell. The cell wall is somewhat thick and is seen rightly when stained. The cytoplasm is also lightly stained containing a darkly stained nucleus at the periphery of the cell.

Explanation:

I hope this will help you buddy

Describe the chemistry of two types of enzymes and explain how the apoenzyme forms 200-500 words APA Format​

Answers

Answer:

Enzymes can be defined as biological polymers that catalyze biochemical reactions.”

Majority of enzymes are proteins with catalytic capabilities crucial to perform different processes. Metabolic processes and other chemical reactions in the cell are carried out by a set of enzymes that are necessary to sustain life.  

The initial stage of metabolic process depends upon the enzymes, which react with a molecule and is called the substrate. Enzymes convert the substrates into other distinct molecules and are called the products.  

The regulation of enzymes has been a key element in clinical diagnosis because of their role in maintaining life processes. The macromolecular components of all enzymes consist of protein, except in the class of RNA catalysts called ribozymes. The word ribozyme is derived from the ribonucleic acid enzyme. Many ribozymes are molecules of ribonucleic acid, which catalyze reactions in one of their own bonds or among other RNAs.

Enzymes are found in all tissues and fluids of the body. Catalysis of all reactions taking place in metabolic pathways are carried out by intracellular enzymes. The enzymes in plasma membrane govern the catalysis in the cells as a response to cellular signals and enzymes in the circulatory system regulate clotting of blood. Most of the critical life processes are established on the functions of enzymes.

Enzyme Structure

Enzymes are a linear chain of amino acids, which give rise to a three-dimensional structure. The sequence of amino acids specifies the structure, which in turn identifies the catalytic activity of the enzyme. Upon heating, enzyme’s structure denatures, resulting in a loss of enzyme activity, that typically is associated with temperature.  

Compared to its substrates, enzymes are typically large with varying sizes, ranging from 62 amino acid residues to an average of 2500 residues found in fatty acid synthase. Only a small section of the structure is involved in catalysis and is situated next to the binding sites. The catalytic site and binding site together constitute the enzyme’s active site. A small number of ribozymes exist which serve as an RNA-based biological catalyst. It reacts in complex with proteins.

Explanation:

Plz mark as Brainliest...

Explanation:

What is the function of the mitochondria?
A. Stores the cell's DNA
B. Builds proteins
C. Produces energy for the cell by respiration
OD. Stores the cell's glucose
Reset Selection

Answers

C. Mitochondria is like the power plant of the cell and produces its energy.

Answer:

Produces energy for the cell by respiration

Explanation:

The glucose obtained from food is broken down to pyruvic acid in the cytoplasm. This pyruvic acid is broken down into oxygen, water and energy rich ATP molecules in the Mitochondria.

The haptoid condition for a human ?
A/
‏-Both 46 chromosomes & 2n are correct.
‏-2n
B/
‏-Neither 46 chromosomes 2..nor 2n are correct.
C/
‏-46 chromosomes

Answers

haploid means there is 23 pair of chromosome but have n ploidy

For every 100ml of deoxygenated blood delivers approximately _____ml of CO2 to the alveoli.​

Answers

Answer:

For every 100ml of deoxygenated blood delivers approximately __4___ml of CO2 to the alveoli.

Answer:

4ml

Explanation:

For every 100ml of deoxygenated blood delivers approximately 4 ml of CO2 to the alveoli.

Hope it is helpful....

The basal metabolism of a human adult is the total rate of energy production when a person is not performing significant physical activity.

a. True
b. False

Answers

Answer:

True

Metabolism refers to the countless chemical processes going on continuously inside the body that allow life and normal functioning.

The amount of kilojoules your body burns at any given time is affected by your metabolism.

Your metabolic rate is influenced by many factors – including age, gender, muscle-to-fat ratio, amount of physical activity and hormone function.

Hope this helps you ❤️

MaRk mE aS braiNliest ❤️^_^

Answer:

Explanation:

                FALSE

Which scientist was responsible for coining the phrase "Big Bang"? *
O Fred Hoyle
O Albert Einstein
O Sir Isaac Newton
O Edwin Hubble

Answers

Answer:

Fred Hoyle

Explanation:

Sir Fred Hoyle FRS was an English astronomer who formulated the theory of stellar nucleosynthesis. He also held controversial stances on other scientific matters—in particular his rejection of the "Big Bang" theory, a term coined by him on BBC radio, and his promotion of panspermia as the origin of life on Earth

The scientist that was responsible for coining the phrase “Big Bang” was
a) Fred Hoyle

1. Why is the nitrogen cycle important?

Answers

Answer:

Nitrogen is found in soils and plants, in the water we drink, and in the air we breathe. It is also essential to life: a key building block of DNA, which determines our genetics, is essential to plant growth, and therefore necessary for the food we grow.

Explanation:

Marke me a brainlist

If brown eyes are recessive to blue eyes, then which of the following would represent a mouse with brown eyes?
1.) ee
2.) EE
3.) Ee
4.) eE

Answers

The answer is 4.) eR

Answer:

ee

Explanation:

ee is recessive

What is the main compound in plants

Answers

Answer:

Cellulose is found in the cell walls of plants and provides rigidity and strength. It is one of the most abundant organic compounds on Earth.

Explanation:

Match each term with the best description.

a. Membrane-bound structure that supports energy production.
b. Semi-permeable, living covering of the cell.
c. Long, whip-like appendage used for locomotion.
d. Membrane-bound structure containing the hereditary material of the cell.
e. Gel-like substance encompassing the contents of the cell
f. Basic structural and functional unit of living orgaisms

1. Cell
2. Cell membrane
3. Cytoplasm
4. Flagellum
5. Mitochondrion
6. Nucleus

Answers

Answer:

a) 5. mitochondrion

b) 2. cell membrane

c) 4. flagellum

d) 6. nucleus

e) 3. cytoplasm

f) 1. cell


The currently accepted model of the cell membrane was discovered by ________ in the year ______

A) Charles Overton, 1895
B) singer and Nicolson, 1972
C) Davison and Danielli, 1970
D) Irving Langmuir, 1917

Answers

Answer:   B

Explanation:  The currently accepted model of the membrane is the fluid mosaic model.  S. J. Singer and G. Nicolson proposed the fluid mosaic model in 1972.

The cell membrane model depicts the arrangement of the biological membrane and its component. The fluid mosaic model was given by Singer and Nicolson in 1972. Thus, option B is correct.

What is the fluid mosaic model?

The fluid mosaic model was discovered by Singer and Nicolson and is a widely accepted model for the structural organization of the plasma membrane and its components. It elucidates the mosaic of plasma components.

The proteins, lipids, and carbohydrates are the main components of the plasma membrane that are arranged and shows the fluid nature of the biological membrane.

Its arrangement and structure allow the semi-permeable nature and its role as the barrier. It shows the membrane is a lipid bilayer that includes the hydrophobic tail and the hydrophilic head.

Therefore, the fluid mosaic model was given by Singer and Nicolson.

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All human impacts on the environment, such as the depletion of natural resources, are significantly worsened by __________. air and water pollution climate change human population growth agricultural practices

Answers

Answer:

overpopulation

Explanation:

this along with the others listed have triggered climate change and soil erosion

What is the function of bile in the digestion of fats in the small intestine?

Answers

Answer:

Bile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion. It breaks down fats into fatty acids, which can be taken into the body by the digestive tract.

Explanation:

When digesting fats, bile acts as an emulsifier to break the large fat globules into smaller emulsion droplets. Emulsified fats provide a larger area for the fat-digesting enzymes (lipase) to act, making the process quicker. Bile acts as a good solvent.

which of the following is not a component of downstream process?
a) Seperation
b) Purification
c) Preservation
d) Expression​

Answers

Answer:

d) Expression

Explanation:

Downstream processing is the recovery of biological products which includes stages extraction, separation, purification and preservation of the biotechnological products. The product is formulated with suitable preservatives. Therefore, the correct answer is option d.

Answer from Gauth math

preservation

Explanation:

may this help you

A closed system can be described as

Answers

A system can be either closed or open: A closed system is a system that is completely isolated from its environment. This is the definition commonly used in the system literature, which we have chosen to follow.

A closed system can be described as a physical system that does not exchange matter with its surroundings, but can exchange energy.

In the context of thermodynamics and physics, a closed system refers to a system that can exchange energy with its surroundings in the form of heat or work, but does not exchange matter with the external environment. This means that the total mass of the closed system remains constant over time, as no matter is entering or leaving the system. However, energy can still be exchanged between the closed system and its surroundings.

For example, a closed container of gas that can exchange heat with its surroundings while not allowing any gas molecules to escape or enter is a closed system. Similarly, a pot of boiling water with a lid on it can be considered a closed system since water vapor (matter) is not escaping, but heat energy is being transferred through the lid. Closed systems are a fundamental concept in thermodynamics and are often used as a simplified model to analyze and understand energy exchanges without the complexities of matter flow.

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How much of Yellowstone burned in 1988?

Answers

36% of the park burned in 1988

Answer:

The 1988 fires affected approximately 800,000 acres (or ~36%) of the park. Five fires burned into the park that year from adjacent public lands, including the largest, the North Fork Fire. It started accidentally and burned more than 410,000 acres.

Explanation:

Which of the following is a scientific question?

Answers

Answer:

c

Explanation:

I need help pls answer 30 points i need correct. answer. Fi its wrong i will report.

Draw a diagran to explain filtration. Label the residue and filtrated​​

Answers

Answer:

Filtration is technically defined as the process of separating suspended solid matter from a liquid, by causing the latter to pass through the pores of a membrane, called a filter. The most common example is making of tea. While preparing tea, a filter or a sieve is used to separate tea leaves from the water.

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