The gases present at the origin of the earth were believed to be nitrogen (N2), Carbon dioxide (CO2), water vapor (H20), and maybe some carbon monoxide (CO).
Origin of the earthThe earth is believed to have originated in what scientists have referred to as the big bang in which several gases were formed.
The gases present at the origin of the earth were believed to be nitrogen (N2), Carbon dioxide (CO2), water vapor (H20), and maybe some carbon monoxide (CO). The gases aggregated to form amino acids hence the origin of the initial life forms.
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answer for brainliest please
Answer:
im gonna go with b it makes more sense to me
Diploid plants have two sets of chromosomes. Polyploid plants have more than two sets of chromosomes, are often larger, and have more desirable characteristics. To create polyploid plants, plant breeders can treat diploid plants with a chemical that prevents the separation of sister chromatids during mitosis. Resulting cells that have any partial chromosome sets, even if in addition to one or more complete chromosome sets, typically do not survive this process.
If a diploid plant cell treated with such a chemical goes through a single round of mitosis, what is the MOST LIKELY genetic composition of the resulting cells that survive?
Answer:Both haploid and diploid cells can undergo mitosis. When a haploid cell undergoes mitosis, it produces two genetically identical haploid daughter cells; when a diploid cell undergoes mitosis, it produces two genetically identical diploid daughter cells.
Answer:
its b
Explanation:
To produce a tetraploid plant, the alkaloid colchicine is applied to the terminal bud of a branch. All the cells in the developing branch will be tetraploid (4n) with four sets of chromosomes. This includes cells of the stem, leaves, flowers and fruit. Gametes (egg and sperm) produced by a flower on this tetraploid branch will be diploid (2n) with two sets of chromosomes. A flower on the normal diploid (2n) branch will produce haploid (n) gametes containing one set of chromosomes.
Stages of mitosis in the formation of tetraploid cells. The original mother cell is diploid (2n). During anaphase the chromatids separate and move to opposite ends of the cell. Colchicine causes the dissolution (depolymerization) of protein microtubules which make up the mitotic spindle in dividing cells. This leaves the cell with twice as many single chromosomes (four sets rather than two). When this cell divides, each of the two daughter cells will have fours sets of chromosomes, a total of eight chomosomes per cell. [Note: Spindle poisons such as colchicine are used to prevent tumor cells from dividing in certain chemotherapy treatments.]
The botanical term parthenocarpy refers to the development of the ovary of a flower into a fruit without fertilization. [The biological term parthenogenesis refers to the development of an egg without fertilization.] Fruits that develop parthenocarpically are typically seedless. Some seedless fruits come from sterile triploid plants, with three sets of chromosomes rather than two. The triploid seeds are obtained by crossing a fertile tetraploid (4n) plant with a diploid (2n) plant. When you buy seedless watermelon seeds, you get two kinds of seeds, one for the fertile diploid plant and one for the sterile triploid. The triploid seeds are larger, and both types of seeds are planted in the same vicinity. Male flowers of the diploid plant provide the pollen which pollinates (but does not fertilize) the sterile triploid plant. The act of pollination induces fruit development without fertilization, thus the triploid watermelon fruits develop parthenocarpically and are seedless. Most bananas purchased at your local supermarket came from sterile triploid hybrids. The fruits developed parthenocarpically and are seedless.
How do structures p and Q work together to maintain homeostasis within the cell
Answer:
they combine
Explanation:
they combine
What are some advantages and disadvantages of being a social organism (include at least 4)
what does post school destination mean?
Post-school destination literally means your destination after schooling.
Post-school destinationPost- means after. Thus, post-school means 'after school'.
Post-school destinations, therefore, refer to where you are heading once you are done with school.
It is a phrase that is often used to describe the transition from one period of schooling to another or a period of schooling to taking up jobs or careers.
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The diagram shows the forelimb (front arm or leg) skeletal structure of three mammals. Mammal Skeletal Forelimbs Human Whale Bat
Identify two pieces of evidence from the diagram that are needed to support a claim that these organisms share a common ancestor.
Answer:
clear example of homologous structures is the forelimb of mammals. When examined closely, the forelimbs of humans, whales, dogs, and bats all are very similar in structure. Each possesses the same number of bones, arranged in almost the same way. ... They are analogous structures.
Explanation:
hope it helps you
which statement describes a response to external stimuli
Answer:
A rabbit runs away from a fox that is chasing it is external stimuli
Thirst and hunger are internal stimulation caused by hypothalamus of human brain
Yawning is a process occuring due to low oxygen levels in the blood which is also internal factor
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Answered by: ms115
Which of the following is NOT true about the scientific method?
O A. It does not apply to problems encountered in everyday life
OB. It is a framework to consider opinions
OC. It begins with observations
OD. It is a general way of organizing an investigation
Answer: The answer is c
Explanation:
It always starts with observation sot find out what is going on in the lab.
Answer The Correct One
Answer:
A
the reason why the answer is A is because petroleum, coal,natural gas are nonrenewable resources
A force of 2.20 N is exerted on a 7,20 g rifle bullet. What is the bullet's acceleration? (Enter your answer in m/s^ 2 )
Answer:
The answer is 306 m/s^2
Explanation:
F = m*a
We can rearrange this formula to get a = F / m.
The SI unit for mass is kilograms (kg).
The SI unit for acceleration is m/s^2.
There are 1000 grams in a kilogram.
7.20 g = 0.00720 kg
Force (2.20 N) / 0.00720 kg = 305.56 m/s^2
Accounting for Sig Figs, the answer is 306 m/s^2.
Gee, that's one fast bullet.
disadvantages of binomial nomenclature
Answer:
the disadvantage of binominal nomenclature
Explanation:
Some of the main drawbacks of binomial nomenclature are: If two or more names are actually in use in compliance with the priority rule, the appropriate name will be used first and the other names will end up being synonyms because authenticity is synonymous with the senior.
Pls answer this asap I need it pla help meh
Answer:
1) C
2) C
3) A
4) B
5) A
Explanation:
Hope it helps
The diagrams below represent forms of reproduction. In which form of reproduction will the offspring differ
most from the parent?
1:bacteria
2:strawberry plant
3:sperm and egg cell
4:hydra
How is skin color determined?
Answer:
Explanation: Skin color is determined by a pigment referred to as melanin
please help!!
…………………….
Answer:
1) It eliminates extreme traits, 2) represents a population where most individuals are above average
Explanation:
Disruptive selection is DISRUPTIVE to an ecosystem, making the ecosystem scarcer of extreme traits. Also, a BELL-shaped pattern, where a line slopes upward and then back down, would represent a population that is mostly above average, since the climax is a maximum instead of a minimum. Hope that helps :)
Why does a soild changes to liquid when heat is added
Answer:
Explanation:
When a solid is heated the particles started to vibrate faster and when it vibrate faster the outer layer breaks down and change into liquid.So,a solid change into liquid when heat is added.
Hope it helps you:)
Which of these transport sediment?
A. Water
B. Wind
C. Glaciers
D. All of these
All the listed are transport sediments;
waterwindGlaciersWHAT ARE TRANSPORT SEDIMENTS:Sediment transport refers to the movement of solid particles as a result of gravity and transport factors.
Different materials are moved as a result of sediment transport.
The transport sediments include the following:
waterwindGlaciersLearn more about sediment transport at: https://brainly.com/question/2621857
Genetic engineers use plasmids. A plasmid is
A. a map of a gene.
B. a cell that is not yet specialized.
C. a small, circular piece of DNA.
D. an enzyme that can cut DNA into pieces.
Answer:
C. A small, circular piece of DNA
Explanation:
A plasmid, usually circular but sometimes linear, is a small double-stranded DNA unit, which is chromosome independent and is capable of self-replication. Each plasmid carries only a few genes. Carrying only a few genes, the plasmid’s size ranges from 1 to more than 1000 kbp. Genes required for organism survival and those that are generally beneficial to the host organism, such as antibiotic resistance, are often found in plasmids [1].
Mostly plasmids can be found in bacteria, but they are also present in multicellular organisms and archaea. Plasmids usually contain at least one gene and are not considered independent life forms even though they possess separate genes from their hosts
The Krebs cycle produces ________, ________, and carbon dioxide.
Question options:
A)
electron carriers, oxygen
B)
pyruvate, ATP
C)
ATP, electron carriers
D)
oxygen, ATP
E)
glucose, oxygen
Answer:
This produces 2 ATP and 6 NADH
Explain why injury to tissue can prompt cells in the surrounding area to undergo cell division.
what are the 3 types of symbiosis?
Give examples.
Answer:
Types of Symbiosismutualism - a mutually beneficial symbiotic relationship.commensalism - a one-sided symbiotic relationship.parasitism - one species lives on, in or with a host species.competition - relationship in which organisms compete for resources.
Answer=
Mutualism, commensalism, and parasitism are the three forms of symbiosis. Symbiotic connections are classified into one of these categories based on the nature of the interaction between organisms. Mutualism is a positive connection in which both species gain from one another.
examples=
-For food and marine resources, sea sponges and coral compete.
-Small animals and jackals share the same water supply.
-In their natural settings, wolves and bears both pursue the same prey.
Does genetic drift occur in small population
Please help me please
The computer forensics DNA tool is used to
O monitor potential hacking carried out over the Internet
O identify fraudulent bank and accounting records on a computer
O replace a hard drive that has crashed
O find data on a CD-ROM drive
Answer:
monitor potential hacking carried out over the Internet
Explanation:
examples of endogenous antig
ens
Answer:
Exogenous antigens include particles considered foreign within the organism. For example, allergens (such as pollen), proteins from transplanted tissues and organs, and parts of microorganisms (such as coat, capsule, cell wall, flagella, fimbria, or toxin of bacteria, viruses, etc.)viral proteins produced during viral replication;proteins produced by intracellular bacteria such as Rickettsias and Chlamydias during their replication;proteins that have escaped into the cytosol from the phagosome of phagocytes such as antigen-presenting cells;a time line of the changes that have occurred in modeling the atomic structure since the 1800s
can someone help me arrange this pls ?!?
Answer:
anaphase,metaphase,prophase,telophase
last one lol i promise
Answer:
You're right, it's A. The temperature of the water is greater than 8 degrees Celsius in Beaker A.
Explanation:
I hope this answers your question(s). Have a good weekend!
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Need help asap
Which of the following is true about the founder effect?
A) The founder effect results in an increase in genetic variation.
B) The smaller population remains the same as the original, larger population.
C) The founder effect inhibits the expression of rare traits.
D) The founder effect is a type of genetic drift.
E) none of the above
Answer:
Among the following statements shown, the most accurate concerning the founder effect is that (b) It results when a small population breakers away from a larger one. Founder Effect is defined as the reduced genetic diversity which is most likely caused when a population is descended from a small number of colonizing ancestors.
The true statement about founder effect is "the smaller population remains the same as the original, larger population".
What is founder effects?Founder effect can be defined as the reduced genetic diversity which results when a population is descended from a small number of colonizing ancestors or larger population.
Therefore, the true statement about founder effect is "the smaller population remains the same as the original, larger population".
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What characteristic do biologists use to classify organism into kingdoms
Answer:
the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.