How does the rate of extinction compare to the rate of species formation on earth today?

Answers

Answer 1

The rate of extinction is faster.



Related Questions

An impulse that travels inward from a sensory receptor to the spinal cord, then outward to a muscle is called a(n) _____.

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Rooting. The dorsal root of spinal nerve (or posterior root of spinal nerve) is one of two "roots" which emerge from the spinal cord. It emerges directly from the spinal cord, and travels to the dorsal root ganglion. The dorsal root transmits sensory information, forming the afferent sensory root of a spinal nerve.

What was found by astronomers who noticed a strange pattern in the orbit of uranus?

Answers

Final answer:

Astronomers noticed a strange pattern in Uranus' orbit, leading to the discovery of Neptune and the confirmation of Newton's laws of motion.

Explanation:

The astronomers who noticed a strange pattern in the orbit of Uranus found that Uranus did not follow the predicted orbit based on Newton's laws of motion. This discrepancy led to the prediction and discovery of the planet Neptune in 1846, which confirmed the validity of Newton's theory.

Uranus' orbital anomalies were explained by the gravitational effects of an unseen planet, Neptune, serving as an example of how scientific theories are confirmed through observational evidence.

The discovery of Neptune based on the irregularities in Uranus' orbit highlighted the importance of precise mathematical calculations and observational data in the field of astronomy.

Influenza is a bacterial infection spread by the coughing of respiratory secretions.
a. True
b. False

Answers

It is true bacteria spreads by coughing or sneezing 
False influenza is a virus. Viruses mutate often, which is why you need a shot for it every year.

Which of the following correctly explains how a mutation can result in life-threatening cancer?

a. Cancer cells grow and destroy the blood supply to the area of the initial exposure.
b. Cancer cells cause an autoimmune response which results in a build-up of cell matter.
c. Cancer cells invade and destroy healthy cells, disrupting their normal functions.
d. Cancer cells take over the function of healthy cells, avoiding detection by the immune system.

Answers

i believe the answer is (b.) Cancer cells cause an autoimmune response which results in a build-up of cell matter.
This makes the autoimmune system perceive the cells as something dangerous, but since cancerous cells often not identified by the autoimmune cells properly, it often attacks the good cells (or its own tissues) instead which cause the life-threatening situation.

Two nuclei now form, followed by cytokinesis. how many chromosomes are in each nucleus

Answers

It depends upon what type of cell which underwent the division. If it is a somatic cell and it underwent mitosis, the number of chromosomes remains unchanged at 46 in each cell. On the other hand, if it is a sex cell, the number of chromosomes is halved (23) after meiosis. By the way, mitosis is the term for cell division among somatic cells and meiosis is for the sex cells.

How does the epidural space surrounding the spinal cord differ from that surrounding the brain?

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The epidural space surrounding the spinal cord differs from the surrounding of the brain is because the epidural space is set to be a separation of the dura mater that surrounds the spinal cord and the spinal dura, in which, allows separation because of its component of having fat and blood vessels.

With what portion of the brain is the pituitary associated?

Answers

The answer is the hypothalamus. It is a portion of the brain that comprises a quantity of small nuclei with an assortment of functions. One of the most significant purpose of the hypothalamus is to connect the nervous system to the endocrine system through the pituitary gland.

Which term describes the excessive thirst that is symptomatic of diabetes insipidus?

Answers

"Polydipsia"

The word derives from the Greek: "poly" means many, several; and "dipsia" means thirst. The reason why people with diabetes insipidus have polydipsia is that they also have polyuria (to urinate a lot) leading them to the need of replacing the fluids that are being lost.

How can prokaryotic cells be smaller than eukaryotic cells and still carry on all the functions of life?

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thcfcxxfxfxfxfxfxrxesdtfghbvcxdfgvcxdfvcxdfgvcdfgv

Organisms that use light for their energy source and co2 for their carbon source are called __________.

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Organism that use light for their energy source and co2 for their carbon source are called photoautotrophs which are commonly known as prokaryotes.
Final answer:

Photoautotrophs are organisms that use light as their energy source and CO2 as their carbon source. This includes green plants and some types of bacteria that utilize photosynthesis.

Explanation:

Organisms that use light as their energy source and CO2 as their carbon source are called photoautotrophs. An example of such organisms includes green plants and some types of bacteria. These organisms are capable of photosynthesis, where light is converted into energy and CO2 is used to produce carbohydrates.

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The density of mercury is 13.54 g/cm3. Suppose you need 40 gm of mercury for an experiment. What volume of mercury do you need?

A. 2.95 cm3
B. 541.60 cm3
C. 26.46 cm3

Answers

The formula for density is:
Density= mass/ volume
Which means the formula for volume will be;
Volume= mass/ density
Which means the formula for volume will be
You were given the density as 13.54g/cm3 and the mass as 40gm. Just use them in the formula. That will be
Volume= 40/13.54
And that is 2.95 which is A. Hope I helped. Have a nice day

Which biotic factor would limit the antelope population in the African savanna? A) bacteria B) lions Eliminate C) rainfall D) zebra

Answers

B) Lions is the answer

The correct answer is B) Lion .

In African savana variety of food chains operate. Any food chain consists of producer and different consumers. In a given question antelopes are herbivores. They are the primary consumers and eats green plants (producers). Whereas lions are carnivores. They are predator which kills antelopes and eat them. Therefore, lion will limit the population of antelopes in African savana.  

Body cell mutations cannot be passed on to offspring. This is because body cells do not contribute genetic material to A. daughter cells. B. non-mutant cells. C. sex cells. D. each other.

Answers

Body cell mutations cannot be passed on to offspring. This is because body cells do not contribute genetic material to SEX CELLS. C is your answer

The right answer is C. sex cells.

Like all cells, a somatic cell can mutate.

* A somatic mutation, if it is "viable" (if it does not kill the cell, organ or organism that carries it), and if it is not controlled by the body (apoptosis, confinement of the mutated cell) can give rise to new identical cell lines, thus carrying the same mutation.

* In so-called evolved animals (which can not clone naturally), this mutation affects only the organ or the organism concerned, but will not be transmitted to the offspring of the individual.

Discuss how temperature and amount of precipitation can affect the type of plants and animals found in the deciduous biome. guys plzzzzz make it like a paragraph long!!!! its science!

Answers

Temperature affects the type of plants because different plants require different temperatures and precipitation levels. Such as in the case of cacti, they need very little precipitation and can withstand very high levels of heat. 

How does physician assisted suicide affect the family?

Answers

It effects true family because suicide stays in your heart and the physician is suppose to fix the family not kill peaple

It effects true family because self harm stays in your heart and the physician is suppose to fix the family.

what are the major duties of a physician ?

The major duties of a physician to Order tests and analyze their results, Refer patients to specialists.

They involve in Creation of treatment plans and Explain side effects of medications and treatment options.

They Perform basic medical procedures, Record medical history and Identify symptoms and diagnose patients, Provide advice for improving patient health.

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The hypothalamus ________.
a. is an important auditory and visual relay center
b. mediates sensations
c. has the pulvinar body as part of its structure
d. is the thermostat of the body because it regulates temperature

Answers

I believe D would be your answer, my friend. :)

The hypothalamus is the thermostat of the body because it regulates temperature, ensuring homeostatic control over various physiological functions, including the autonomic and endocrine systems.

The hypothalamus is a critical brain structure that serves as the control center for various homeostatic mechanisms. It has a multitude of functions, including regulation of the autonomic and endocrine systems.

Specifically, the hypothalamus is the thermostat of the body because it regulates temperature, ensuring that the body's temperature is kept at appropriate levels. It also plays a key role in controlling responses such as stress, along with the 'fight or flight' response, and it influences behaviors related to reproduction, sleep, thirst, hunger, and other homeostatic functions like blood pressure and energy expenditure.

The hypothalamus also manages the body's circadian rhythms, often referred to as sleep cycles, and has neural connections that can affect the entire body's chemistry and function. Additionally, it is involved in emotional responses and is a major component of the limbic system, which is associated with emotion and memory.

Answer to the Question:

The given statement should be completed as: The hypothalamus is the thermostat of the body because it regulates temperature. Therefore, the correct answer to the question is option (d).

A woman comes to the office of her healthcare provider reporting shortness of breath and epigastric distress that is not relieved by antacids. to which question would a woman experiencing a myocardial infarction respond differently than a man? "do you have chest pain?" "are you feeling anxious?" "do you have any palpitations?" "are you feeling short of breath?"

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Answer: A) Do you have chest pain. Explanation: Women having a heart attack are less likely to experience chest pain. They don't express themselves till the symptoms appear more severe.

The muscle tissue in the wall of the alimentary canal is primarily smooth muscle. however, in at least one location it contains skeletal muscle. where is skeletal muscle located and what is its function?

Answers

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A nurse is caring for a client who has peptic ulcer disease and reports a headache

Answers

What is the question here?
Answer with Explanation

The nurse need to keep a check on sign and symptoms of infection( fever, tachypnea, tachycardia) sign and symptoms of hypovolemia (hypotension, tachycardia).  Also keep a greater check on heart burning during the meal as it is one of the main causes of peptic ulcer during a meal or during the night time. In addition to this she need to perform the lab test needed that is H.pylori (most important) others include CBC, aPTT, INR.

Medication should be on time. The nurse also need to refer endoscopy if needed. Along with this inform the patient about nutritional changes needed and motivate to change lifestyle if the patient has an unhealthy routine.

Which of the following elements is a transition metal?

calcium
magnesium
nickel
antimony

Answers

Answer:

Nickel, Ni, atomic number 28

:

Nickel, Ni, atomic number 28 Is a transition metal. It falls in the "d" region. 4 of Period, group 10.

Calcium and magnesium are alkaline earth metals, and antimony is a metal in the nitrogen group.

Nickel is classified as a transition metal. Therefore, option (C) is correct.

Transition metals have partially filled electron d-orbitals. These elements are in groups 3–12. Nickel's atomic number is 28 and it's in the periodic table's d-block. Transition metal qualities come from its partially filled 3d orbital. Nickel has many oxidation states and forms colourful compounds.

Nickel is shiny and corrosion-resistant. Electroplating, batteries, catalysis, and alloys like stainless steel employ it. Transition metals are catalysts and undergo redox reactions. Nickel has the electron configuration, periodic table position, and chemical behaviour of a transition metal. Therefore, option (C) is correct.

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Many biotic factors affect individuals in a population. An example of an organism being directly affected by a biotic factor is

a squirrel cannot find a mate



a flood washes away a maple tree



a plant is in a dark room



a chipmunk finds a rock pile to use for a home

Answers

Biotic factors can affect individuals by many factors in a population due to the common places that they might be accustomed to gathering, maybe a cathedral or restaurant or even the electoral voting booth. A choices that a population makes as a group affect more than the majority inhibiting those who oppose until that choice is represented again and the population can change their vote, the ways of natural catastrophe can only be changed by changing what can be seen: putting a plant in a window, rerouting a maple tree, medicating an entire population, and making the most out of living in a homeless shelter.

Answer:1 squirrel can’t find a mate

Explanation:

not being able to find a mate is a biotic factor

A disaccharide is formed when two monosaccharides are joined together by

Answers

Disaccharides are formed when two monosaccharides join together by the dehydration synthesis reaction resulting in a glycosidic bond between the two monosaccharide molecules.

Monosaccharides and disaccharides are the monomeric units of carbohydrates. The two units of monomers are joined by a glycosidic bond.

Carbohydrates are biomolecules, which are made up of monomeric units, known as monosaccharides. These monomeric units like glucose join together to form maltose.

The bond between the monosaccharides is glycosidic. It is formed by the dehydration synthesis reaction, in which one monosaccharide (glucose) will lose H-atom, and the other (glucose) will lose an OH-group. Thus, it leads to the elimination of water molecules, and new covalent bonds are formed.

Therefore, monosaccharides are joined by glycosidic bonds.

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During diffusion, molecules move
A) in no predictable pattern.
B) to points equidistant from the point of origin.
C) from lower concentration to higher concentration.
D) from higher concentration to lower concentration.

Asexual reproduction in the parent cell will result in offspring with
A) similar genetic information.
B) half the genetic information.
C) double the genetic information.
D) four times the genetic information.

Answers

The first one: Diffusion is the process when molecules tend to move from an area of high concentration to an area of low concentration 

The second one is: A) similar genetic information. 

Answer:

The answers of first question is-D) from higher concentration to lower concentration.

The answer is second question is- A) similar genetic information.

Explanation:

Diffusion is the process in which particles move from that region where their concentration is more to a region where the concentration of these particles is less. Diffusion is a passive process which means it does not require any king of energy to transport the particles because it occurs along the concentration gradient.

During asexual reproduction, parent makes identical copies of itself. As in asexual reproduction, no combination of gamete takes place from outside and the daughter cells have the same copy of DNA as of the parent cell therefore asexual reproduction in parent cell results in offspring with similar genetic information.

Which part of the crossbow holds the arrow in the track until the trigger is squeezed?

Answers

Final answer:

The lock of a crossbow holds the arrow in place until the trigger is released. This mechanism is essential in the functionality of the crossbow and affects the accuracy and power of the shot.

Explanation:

The part of the crossbow that holds the arrow in place until the trigger is squeezed is called the lock. The lock mechanism consists of a lever or latch that keeps the string in place when the crossbow is drawn. Once the trigger is squeezed, the lock releases the string, which propels the arrow down the track and towards its target. It is an essential, non-negotiable element of any crossbow design and its effective functioning determines the accuracy and power of the shot. Like many engineered pieces of equipment, understanding how each part works can help in efficiently operating the tool, in this case accurately shooting the crossbow.

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A normal fertilized egg, or zygote, contains _____ pairs of chromosomes. 23 21 2 46

Answers

i belive the answer is 23

A/an _____ is a malignant tumor that occurs in epithelial tissue.

Answers

A/an carcinoma is a malignant tumor that occurs in epithelial tissue.
Final answer:

A carcinoma is a cancerous growth or malignant tumor that develops in the epithelial tissue. Epithelial tissues line the body's outer surface and internal organs. Common examples of carcinomas include lung, breast, and colon cancers.

Explanation:

A cancerous growth originating in the epithelial tissue is known as a carcinoma. This is the type of tissue that lines the outer surface of the body and internal organs. Malignant tumors can invade nearby tissues and spread to other parts of the body through the blood and lymph systems, posing a severe health risk. Examples of carcinomas include lung, breast, and colon cancers.


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How does thermal energy affect particle movement?

Answers

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.
The more thermal energy there is, the faster the particles move.

The theory of a vitalism has been rejected by present-day scientist. Describe vitalism. Describe what scientists now think about the basis of life and why they rejected the theory of vitalism.

Answers

Vitalism was the antiquated belief that all life can be derived from dihydrogen oxide compounds dating back to the paleozoic time era. Scientist now know and accept that life is dynamic and fundamental to the origins of heterotrophic processes. It was rejected when Francesco Redi developed photosynthetic filaments from prokaryotic organisms found in primordial sludge.

Answer:

On the basis of the theory of vitalism, all the living things are specific and are distinct from the non-living components as they comprise a unique entity within themselves. This soul or entity distinguishes them from the non-living counterparts. Both of them are monitored by a distinct set of principles.  

However, the theory got rejected when Wohler became successful in obtaining urea from the non-living substance, thus, suggesting the point that the biological constituents can also be obtained from the non-living counterparts. The present scientists now consider that the living components are just more composite in comparison to the non-living constituents.  

The nurse is preparing to administer granulocytes to a client admitted with a severe infection. which teaching by the nurse is most appropriate?

Answers

Granulocytes are a type of white blood cells that can help fight injection. This is the reason the nurse is prepared to administer granulocytes to the client admitted with severe infection. Granulocytes are characterized based on the presence of granules in their cytoplasm.

The client receives methotrexate (rheumatrex). the nurse assesses for side effects of this drug. which side effects are a primary concern for the nurse?

Answers

The client receives methotrexate (Rheumatrex). The nurse assesses for side effects of this drug. Which side effects are a primary concern for the nurse? Answer: Correct answer is Ulcerative stomatitis and diarrhea.
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