New genetic combinations are a result of
a. Nondisjunction
b. Crossing over
c. accidents
d. all of the above

Answers

Answer 1

Answer:

Explanation: D


Related Questions

as of may 2020, carbon dioxide levels have reached 417 parts per million. what level should they be at to have the world in a climate similar to that in which civilization first developed?

Answers

Given what we know about global carbon levels in the present and the past, we can confirm that in order to be at the level of early civilizations, the modern-day carbon level should be at 280 parts per million.

Global atmospheric carbon levels are measured in parts per million. What this means is that for every one million units of mass in the atmosphere, 280 of them were carbon. This means that in recent years, the global carbon levels in the atmosphere have doubled.

The primary cause of these increased carbon levels is industrial pollution. Chemicals are released into the atmosphere as a by-product of industrial processess. This began with a noticeable spike during the industrial revolution and has then increased without end.

To learn more visit:

https://brainly.com/question/24882963?referrer=searchResults

What would happen if I jump out of a plane without my parachute

Answers

Answer:

umm you would not live

Explanation:

what is the space between the presynaptic and postsynaptic membranes?

Answers

Answer:

The synapse at the neuromuscular junction has three characteristic features of chemical synapses in the nervous system. First, there is a distinct separation between the presynaptic and the postsynaptic membrane. The space between the two is known as the synaptic cleft.

Explanation:

I need to know FAST


The failure of homologous chromosomes to separate properly during meiosis
s called
a. Hondisjunction
C. Autosomnes
b. Crossing Over d. Karyotype

Answers

Answer:

Nondisjunction

Explanation:

Nondisjunction occurs when homologous chromosomes or sister chromatids fail to separate during meiosis, resulting in an abnormal chromosome number. 

describe in detail, the pathway of an oxygen molecule as it moves from the air outside your body, into your blood and to cell in a muscle in your arm

Answers

Answer:

The oxygen molecule enters the human body from the mouth or nose and reaches the phraynx and then the larynx, trachea and the bronchus. It then enters the lungs which then the red blood cells takes the oxygen from the blood and carries it to the muscle in the arm.

The pathway of an oxygen molecule from the air outside your body to a muscle cell in your arm involves several sequential steps, including inhalation, gas exchange in the lungs, transportation through the bloodstream, and diffusion into muscle cells.

During inhalation, you breathe in air through your nose or mouth. The air travels through your respiratory system, passing through the trachea (windpipe) and into the bronchi, which branch into smaller tubes called bronchioles. Eventually, the inhaled air reaches the alveoli, tiny air sacs located at the end of the bronchioles in the lungs.

In the alveoli, oxygen molecules diffuse across the thin walls of the air sacs and into the surrounding capillaries. Oxygen diffuses from an area of higher partial pressure (in the alveoli) to an area of lower partial pressure (in the capillaries). Hemoglobin, a protein within red blood cells, binds to the oxygen molecules in the capillaries, forming oxyhemoglobin.

To know more about lungs here

https://brainly.com/question/2619922

#SPJ3

Arolium uses in a cockroach.pleasehelpme.​

Answers

Answer:

just run away ........ ok save yourself

It is used in locomotion

The cockroaches possesses smooth flexible pads found at the distal end of the leg on tarsus. The fifth segment is the most flexible, found at the distal end and is made of a broadly triangular adhesive pad called as the arolium. The arolium is the adhesive organ of the cockroach foot engaged when the legs are pulling and used in scaling and adhering to the smooth surfaces. So, arolium helps in locomotion

So think of arolium as cockroach organ lube

Does venueles carry bright red color?

Answers

Answer:

No

Explanation:

Arteries typically carry oxygenated blood, which is bright red in colour. The exception is the pulmonary artery which carries deoxygenated blood from the heart to the lungs.

Answer:

Venules carry deoxygenated blood. All blood in humans is bright red when oxygenated, but, a darker red when deoxygenated. Deoxygenated blood is darker due to the difference in shape of the red blood cell when oxygen binds to haemoglobin in the blood cell (oxygenated) versus does not bind to it (deoxygenated).

Explanation:

*sigh* its just how science do

Water reacts with sodium metal to produce sodium hydroxide and hydrogen
gas, along with heat and light. What are the reactants in this chemical
reaction?

Answers

Reactants: sodium metal, water

Products: sodium hydroxide, hydrogen gas

Explain how a wholemeal sandwich with tuna and tomatoes will be broken down by the digestive system. Start the process from the mouth and end at the anus.​

Answers

Answer:

All of our energy and nutrition come by way of the gastrointestinal (GI) tract. It is an amazing machine well designed for digesting and absorbing nutrients and for shielding the rest of the body from microorganisms, viruses and other foreign matter. The GI tract spans from the mouth to the anus, with each separate organ having a role in digestion, absorption or excretion.Lastly, if you would like to learn more about yourself and how you can best reach your own nutritional and fitness goals, we encourage you to take a look at the following home health testing guides and resources:

Food Sensitivity Testing Guide

DNA Health Testing Guide

Guide to Life Extension Products

Home Health Testing Guide

Everlywell Home Tests Guide

Home Testing for Heavy Metals

Explanation:

(: tsorry hope to help

Research endangered marine mammals of ocean and polar ecosystem. Write a 100or more words on the factors that have caused this mammals to become endangered.

Answers

Answer: hunting and capture by humans

Explanation: Principal anthropogenic threats to the survival of marine species include fisheries interactions (entanglement in nets and lines), hunting and capture by humans, ship strikes, pollution and habitat degradation, and climate change.

Why is RNA thought to have been the first genetic material? A. RNA has been found on meteorites. B. Primitive organisms, such as some viruses, have RNA as their genetic material. C. RNA is capable of self-replication D. RNA is structurally simpler than DNA.

Answers

Answer:

B.

Explanation:

Because if they have traces of RNA in them, then it might be the first genetic material

Which of the following is a natural event that is part of the long-term carbon cycle? (1 point)
A. Earthquakes
B.Tsunamis
C.Blizzards
D. Volcanic eruptions

Answers

It might be A but I’m not 100% sure

Answer:

Which of the following is a natural event that is part of the long-term carbon cycle?

A. Earthquakes

What happens yo DNA as the cells prepares to divide​

Answers

DNA Synthesis

In preparation for cell division, the cell makes a replica of its entire DNA. This happens during the S, or synthesis, phase of the cell cycle. Mitosis is the division of one cell into two cells that each has a nucleus and the same amount of DNA as the original cell.

explain how a molecule of carbon dioxide from the atmosphere teaches the site of photosynthesis in a leaf

Answers

Answer: On the surface of the leaves of the plants there are a large number of tiny pores known as stomata or stoma. For photosynthesis green plants take carbon dioxide from the air. The carbon dioxide enters the leaves of the plant through the stomata present on their surface. Each stomatal pore is surrounded by a pair of guard cells.

Explanation:

What are 4 characteristics of a non renewable source

Answers

Answer:

There are four major types of nonrenewable resources: oil, natural gas, coal, and nuclear energy.

Explanation:

a red onion cell has undergone a change, as represented in the diagram below. This change is most likely due to the cell being placed in...

Answers

Salt water.
We can see that the cell is shrivelled meaning osmosis has taken place. So it must be salt water

A red onion cell placed in a saline solution will lose water when water moves from the cell to the surrounding hypertonic medium via osmosis, causing the cell to shrivel up.

What is osmosis?

The passage of solvent molecules from a lower concentration solution to a higher concentration solution across a semipermeable membrane. It is a passive process that occurs without the use of any energy.

Solvent molecule transfer proceeds from low to high concentration regions until the concentrations on both sides of the membrane are equal.

What are the types of osmosis?An isotonic solution contains the same solute concentration both within and outside the cell.

A hypertonic solution has a larger solute concentration outside than inside the cell.

A hypotonic solution contains a larger concentration of solutes inside the cell than outside.

Thus, we can conclude that when a red onion cell is placed in salt water.

As we can see in the diagram the onion cell shrink which means it is placed in salt water which is a hypertonic solution.

So, option (3) salt water is correct.

You can learn more about osmosis here:

https://brainly.com/question/11534932

#SPJ2

DNA is coded to RNA, which must travel from the nucleus to the cytoplasm to be read. Why does the cell need to transcribe the DNA into RNA rather than copying the DNA directly?(1 point)

DNA requires too much energy to code; building RNA is more efficient.


DNA cannot be copied; it must be translated to RNA and then back to DNA.

DNA is double stranded and cannot fit through the nuclear membrane; RNA is single stranded.

DNA cannot be read by ribosomes; they can only read RNA.

Answers

Answer:DNA is double stranded and cannot fit through the nuclear membrane; RNA is single stranded.

Explanation:

DNA is double stranded and cannot fit through the nuclear membrane; RNA is single stranded.  DNA could get damaged because of the osmotic nature of cytoplasm. Therefore, option (C) is correct to mitigate he damage.

What is transcription?

The proteins are produced by cells by the transcription and translation of certain genes from their DNA into molecules of messenger RNA (mRNA), chains of amino acids, and finally fully functioning proteins.

The DNA would need to go to the cytoplasm in order to directly make proteins. Because of the osmotic properties of cytoplasm, DNA may become damaged during the translocation process. The cellular machinery does not directly make proteins from DNA in order to reduce the harm.

Learn more about DNA, here:

https://brainly.com/question/19497906

#SPJ2

if the carrying capacity for the north atlantic cod on the grand banks of newfoundland is 500,000 tons, when do you expect that the rate of population growth would be greatest?

Answers

If the carrying capacity for the North Atlantic cod on the newfound land is 500,000 tons, then we would expect that when there are 250,000 tons of cod on the grand banks, the population growth will be greatest.

The carrying capacity speaks volumes about the maximum amount of a species population that the ecosystem can sustain permanently provided there is the availability of water, food, habitat, and other life essentials.

In terms of population ecology, it is defined as the maximum burden that the environment can tolerate.

In population ecology, populations normally decrease above the carrying capacity while they increase below the carrying capacity. A decline in population size above the carrying capacity can be caused by a variety of factors, such as a lack of sunshine, space, or food availability.

Therefore, we can conclude that If the carrying capacity for the North Atlantic cod on the newfound land is 500,000 tons, the rate of population increase will be maximum and greatest when there are 250,000 tons of cod on the Grand Banks.

Learn more about carrying capacity here:

https://brainly.com/question/2375972?referrer=searchResults

PLLLSSS HELP ME I WILL GIVE BRAINIEST
in the Fall of the year, leaves appear red, orange, yellow and brown because the chlorphyll decreases in the leaves and allows the --(blank)-- pigments to reflect mostly colors other than green.

possible answers than can go in the blank are primary or accessory

Answers

The appropriate word to fill into the blank would be accessory.

In the Fall of the year, leaves appear red, orange, yellow, and brown because the chlorophyll decreases in the leaves and allows the accessory pigments to reflect mostly colors other than green.

The core pigment in leaves that makes them appear green is chlorophyll. The pigment is primarily responsible for absorbing light energy to drive the photosynthetic process in plants.

Some other pigments, also known as accessory pigments such as carotenoids, anthocyanins, xanthophylls, etc., help out chlorophyll in some ways but have colours that are different from green.

Thus, the appearance of other colours such as orange, yellow, brown, etc., on leaves is due to a decrease in chlorophyll and the reflection of the colours of the accessory pigments.

More on accessory pigments can be found here: https://brainly.com/question/3405710?referrer=searchResults

the organ of smell and taste are closely related discuss?

Answers

Answer:

They are closely related because the bose and mouth are connexted through the same airway. You taste and smell at the same time.

Biology A Semester Exam
4 of 284 of 28 Items
You find a blog post written by a student on a university website about photosynthesis. Assess the reliability of this source.(1 point)

It may be reliable because the blog has been featured on a popular website.

It may be reliable because they cited multiple high-quality studies from scientific journals.

It may be reliable because other students verify the information in the blog.

It may be reliable because they cited other student blogs.

Answers

A student's post on photosynthesis can be reliable because he cited multiple high-quality studies from scientific journals.

When we research to show that a hypothesis or idea is true, we need to give it reliable support so that people who read our research trust the conclusions of our research, and it is considered as true knowledge.

To give reliable support to an investigation, it is necessary to resort to feasible arguments or true knowledge developed by researchers and specialists. For this, we must consult sources of reliable information.

Examples of reliable sources of information are:

International scientific journalsUniversity researchProven scientific evidenceSpecialized books

According to the above, what the student must do so that his publication is reliable for other students is to cite reliable sources so that the knowledge he is sharing is reliable.

Learn more in: https://brainly.com/question/10906854

Answer:

IT may be reliable because they cited multiple high-quality studies from scincetific journals

Explanation:

Well, we know that this person knows their stuff and has been helpfull to others in the past!

let's give an example of a man, Jorge who has a reputation for helping others and donating to charity.

Tomorrow you're leaving for a week on a business trip and you need someone to watch your house, that is one truthful and is trusting.

We have Bob down the street that is a bloger and has many followers.

The mailman, Carson that everyone likes.

someone random online will watch the house.

Are you going to trust Jorge- the person who helps everyone

Bob- the bloger

Carson-the mailman or,

Someone random- watches houses, 30 bucks  a day

YOUR GONNA TRUST JORGE!! Because he is the reliable and truthful man!

:> hope that helped you

loves you guys!

PLS HURRY


Why are fossils important to developing a theory of evolution?

Answers

Answer:

Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today. ... Paleontologists can determine the age of fossils using methods like radiometric dating and categorize them to determine the evolutionary relationships between organisms

Explanation:

Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today. ... Paleontologists can determine the age of fossils using methods like radiometric dating and categorize them to determine the evolutionary relationships between organisms

The preserved remnants or traces of extinct animals, plants, and other organisms are known as fossils. Because they demonstrate that earlier life on Earth was distinct from the life observed today, fossils are crucial pieces of evidence for evolution.

What is evolution?

According to the idea of evolution, modern life forms have evolved from more ancient ones.

The original theory suggested that this occurred slowly and gradually, but fossil evidence suggests that the process occasionally went wrong and engaged in some very bizarre experiments.

Therefore, they demonstrate that earlier life on Earth was distinct from the life observed today, fossils are crucial pieces of evidence for evolution.

Learn more about evolution, here:

https://brainly.com/question/29694606

#SPJ2

The picture shows a model of a cell.

Answers

Answer:

What is showing is called a Chloroplast. They help the plant capture sunlight energy. So 'B' is the answer.

Explanation:

Answer:

B's your answer.To use energy from sunlight to make sugars

Which would be least likely to be affected by a density-dependent limiting 4
factor?
O a small population of tigers scattered across a wide area
O a rapidly reproducing population of bacteria
a large, dense population of fish in a pond
a population of birds with a high immigration rate

Answers

Answer: a small population of tigers scattered across a wide area

Explanation:

Hope this helps

Answer:

The answer is a. a small population of tigers scattered across a wide area

the process of making an exact copy of dna is called

Answers

Answer:

Replication

Explanation:

(Replication) is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell.

Glands that have branched ducts and secretory cells that form sacs at one end of the ducts are classified as ___________ glands.

Answers

Glands that have branched ducts and secretory cells that form sacs at one end of the ducts are called compound alveolar glands.

What is an exocrine gland?

The exocrine gland secretes enzymes outside the gland through the duct. The gland can be unicellular, multicellular, compound, tubular, alveolar, etc. Their modes of functions vary too. An example of an alveolar gland is the mammary gland. Sweet glands are an example of tubular glands.

Hence, glands having branched ducts and sac-like secretory cells are called compound alveolar glands.

To learn more about the glands, refer to the following link:

https://brainly.com/question/11312688

#SPJ1

what hormone directly opposes the actions of natriuretic hormones?

Answers

Aldosterone!
Explanation: Aldosterone reabsorbs sodium in which is associated with osmotic recovery of water is in direct opposition of natriuretic hormones since it allows secretion of water.

The hormone that directly opposes the actions of natriuretic hormones is aldosterone.

Aldosterone is a hormone produced by the adrenal glands, specifically the adrenal cortex. It acts on the kidneys to promote the reabsorption of sodium ions and the excretion of potassium ions.

Natriuretic hormones, on the other hand, promote the excretion of sodium ions and the reabsorption of potassium ions in the kidneys, leading to increased urine production and decreased blood volume.

Therefore, aldosterone counteracts the effects of natriuretic hormones by increasing sodium reabsorption and reducing potassium excretion, which helps to retain water and maintain blood pressure.

In summary, while natriuretic hormones promote sodium excretion and water loss, aldosterone works in the opposite direction by promoting sodium reabsorption and water retention.

Know more about aldosterone:

https://brainly.com/question/31670445

#SPJ6

What parts of our eyes help us see light?

Answers

Answer:

it's called the renting it controls the pupil

please answer me !!!
no spam and report
Is light an essential condition for germination ?
why or why not ?

gamsahamnida ​

Answers

Answer:

No

Explanation:

Conditions necessary for germination are :

Temperature/Warmth

Oxygen/Air

Water/Moisture


An environmental factor such as storms and extreme heat or cold that affects
population regardless of their density

Answers

Answer:

density-independent factor

Explanation:

density-independent factor, also called limiting factor, in ecology, any force that affects the size of a population of living things regardless of the density of the population (the number of individuals per unit area).

hope this helped!!!! have a great day!

An environmental factor such as storms and extreme heat or cold that affects population regardless of their density are known as density- independent factors.

What are density- independent factor?

Density- independent factors are type of limitation factors that affects the population size in specific environment regardless of the density of that population.

Density of population can be defined as number of individuals per unit area.

Here storms and extreme heat are the limiting factors that reduces the population size regardless pf their density.

To learn more about population ecology:

https://brainly.com/question/18415071

#SPJ2

Other Questions
Find the equation of the line L. Your dad mentioned that he had $100,000 in his retirement account 20 years ago. If the account has grown by the market rate of 10% per year by how much would the account have grown. Which of the following is not the benefit of recycling?. Look at the angle Z that is marked on the shape. Is this angle less than, more than or equal to a right angle? 6th Grade End-of-Module Review Part-xwhole Name Adam Robertson Date 1/12/21 1. Jazzlyn is applying for a job online. She has completed 12 questions. Throughout the application, a bar shows up to represent what percentage of questions she's completed. The progress bar currently shows 25%How many questions are there for the job application? Use a table, diagram, or equation to justify your answer. True or False?If you graph the points (2,4) and (-1.-1). Do they would represent a proportionalrelationship. is this true or false |-2.9|> 2.6 what do you mean by Active voice and passive voice what we have learned about the different cultures of Native Americans Please answer this question. No links :) Imagine that you are a celebrity who is Deaf (you can choose whether you are a movie star, singeranything, really!), and you are being interviewed on the red carpet about your experience as a Deaf person in the public eye. The nations (and maybe even the worlds!) eyes are on you. Consider and explain if and what you would share about your experience being Deaf so that others might better understand what it is like, what challenges you face, and the overall impact it has had on your life. :) help please I sent in a photo Please help. Will give brainiest. Write the equation of the line, in point-slope form. Identify (x 1 , y 1 ) as the point (-2, 2). Use the box provided to submit all of your calculations and final answers. The first three terms in a pattern are shown in theimage below. How many circles would be in the5th term?A. 10B. 15C. 18D.20 I need help please. Which of the following describes the zeroes of the graph of f(x) = 3x6 30x5 75x4?. What point of view is "The Life, Crime, and Capture of John Wilkes Booth" told from?Question 2 options:Third Person - LimitedSecond PersonThird Person - Omniscient First Person Which battle is considered the end of the Revolutionary War? Saratoga Bunker Hill Trenton Yorktown The Ganges empties into which body of water Read the thing its hard to explain in words