Answer:
We sometimes use the word "nebula" to refer to galaxies, various types of star clusters and various kinds of interstellar dust/gas clouds. ... Dark nebulae are also often seen in conjunction with reflection and emission nebulae. A typical ... Planetary nebulae are shells of gas thrown out by some stars near the end of their lives.
Explanation:
In space, a collection of gas, dust, and stars can be part of a galaxy or form different types of nebulae, including dark nebulae, planetary nebulae, emission nebulae, and reflection nebulae. The type and visibility of the nebula depend on the interaction with light and the temperature and radiation of nearby stars.
A collection of gas, dust, and stars can be classified as various types of interstellar matter, such as galaxies, dark nebulae, planetary nebulae, and emission nebulae. However, the term nebula is specifically used today to refer to clouds of gas and dust in space. There are several types of nebulae:
Galaxy: A massive system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity.
Dark Nebula: A dense cloud of gas and dust that blocks the light from stars behind it, making it appear dark.
Planetary Nebula: A shell of gas ejected and expanding away from a dying low-mass star, with its glow often caused by ultraviolet energy from the central star.
Emission Nebula: A cloud of ionized gas emitting light of various colors, often illuminated by the ultraviolet light from nearby stars, typically hotter and more massive stars, causing the gas to glow brightly.
Reflection Nebula: A cloud of dust that reflects the light of nearby stars, often appearing blue because the dust scatters blue light more efficiently than red light.
The types of nebulae are characterized by their interaction with light and the types of stars they surround. Stars cooler than about 25,000 K do not emit sufficient ultraviolet radiation to ionize hydrogen, leading to the reflection nebulae around them appearing brighter than their emission counterparts. The converse is true for stars hotter than 25,000 K as they produce enough ultraviolet energy to make the surrounding emission nebulae outshine reflection nebulae.
When you visit Grandma's apartment, she sets the temperature so high, you sweat every time you are there. The last time you visited her, you started to perspire as soon as you saw her house, before you even entered! This is an example of...
A) observational learning B) operant conditioning C) classical conditioning
Answer:
operant conditioning
Explanation:
Answer:
Operant
Explanation:
Hemoglobin and enzymes are:
A. lipids
B. proteins
C. carbohydrates
D. nucleic acids
Answer:
B. Proteins
Explanation:
Answer:
B. Protein
Explanation:
Haemoglobin are iron containing protein in the blood of many animals while enzymes are catalytic protein responsible for complex biochemical reactions that takes place in plants and animals.
What is a 2-factor cross biology
Answer:
23 +34
Explanation:
because its math
Final answer:
A 2-factor cross in biology involves studying the inheritance pattern of two different traits in offspring. It helps determine whether the traits are inherited independently or if there is any linkage between them.
Explanation:
In biology, a 2-factor cross refers to a breeding experiment involving two factors or traits. This type of cross helps determine the inheritance pattern of two different traits in offspring. For example, if we are studying flower color and plant height in peas, a 2-factor cross would involve examining how these traits are inherited together in the offspring.
One example of a 2-factor cross is the dihybrid cross, which involves studying the inheritance of two different traits at the same time. This type of cross can help determine whether the two traits are inherited independently of each other or if there is any linkage between them.
Which is not true of Meiosis?
A. Meiosis starts with half the number of chromosome as Mitosis
B. The genetic offspring are exactly like the parent cell.
C. There are 23 chromosomes from each parent cell passed on to the offspring.
D. Meiosis goes through 2 stages of division, Meiosis I and II.
Answer:
I would say it is B.
Explanation:
In Meiosis, specifically in Prophase 1, it creates genetic variation. Crossing over occurs in that stage
Final answer:
Statement B is not true about meiosis; offspring produced by meiosis are not genetically identical to the parent cell due to crossing over and independent assortment during Meiosis I and II.
Explanation:
The question is asking which of the statements about meiosis is not true. The correct answer is B. Meiosis does not produce offspring that are genetically identical to the parent cell. Instead, meiosis is a two-stage process (Meiosis I and II) that results in genetically diverse gametes. In contrast to mitosis, meiosis starts with a diploid cell, which has two sets of chromosomes, and through one round of DNA replication followed by two rounds of cell division, ends up creating four haploid cells. These cells have half the number of chromosomes of the parent cell, and due to processes like crossing over and independent assortment, they contribute to genetic variation in offspring.
Statement A is incorrect because meiosis actually starts with the same number of chromosomes as mitosis; it is the end product that has half the number of chromosomes. Statement C is true because during sexual reproduction, each parent contributes 23 chromosomes, which combine to make a total of 46 in the offspring. Statement D is also true, as meiosis includes two stages of division, Meiosis I and Meiosis II, which are necessary to reduce the chromosome number by half and ensure genetic diversity among the gametes produced.
7. EVALUATING METHODS Clean rooms used
for sterile biological research are sealed and
operate at slightly above atmospheric pressure.
Explain why.
Answer:
Clean rooms are used for biological research in order to prevent the research from contamination of other microorganisms.
Explanation:
Rooms were cleaned before any biological research in order to reduce the intervention of other microorganisms in the research and made the research proof from any impurities. These labs have high atmospheric pressure which decline the growth of microbes and the research will be done in a better way.
Having white wool (W) is dominant over having black wool (w). A homozygous dominant parent is crossed with a homozygous recessive parent. The Punnett square shows the possible genotypes of the offspring.
Each offspring will express a phenotype of
wool.
An allele is a variant form of the gene, which is present on the same loci of the chromosome as the gene. The allele can have different phenotypic characters.
In the given cross, the purebred dominant for the white wool with purebred recessive for black wool will result in 100% progeny with white wool.
The dominant alleles are those, which are expressed phenotypically in an organism, whereas the recessive allele is masked by dominant and can be expressed in purebred conditions.
In the given dominant for White wool and recessive black wool, the cross is represented in the attachment below.
The cross between purebred dominant for white and purebred recessive for black is:
WW x ww
Therefore, each offspring will exhibit white wool in heterozygous conditions.
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Answer:
white wool
Explanation:
Which sphere of Earth do humans exist in? atmosphere biosphere hydrosphere lithosphere
Answer:
Biosphere
Explanation:
The Biosphere contains all living things. Atmosphere contains Air and gases. Hydrosphere is all waters on earths surface. Lastly, Lithosphere is the crust and upper mantle.
Final answer:
Humans exist in the biosphere, which is the sphere that includes all living organisms on Earth and their interactions with the lithosphere, hydrosphere, and atmosphere.
Explanation:
The sphere of Earth in which humans exist is called the biosphere. This is because the biosphere refers to all living organisms on Earth, including humans, and their interactions with the other spheres. These other spheres include the lithosphere (the solid land part of Earth), the hydrosphere (water in all its forms), and the atmosphere (the layer of gases surrounding the Earth). Humans interact with the lithosphere by living on it, the hydrosphere by using water for various activities, and the atmosphere by breathing in the air.
Other than passing genes from parents to offspring, bacteria are also capable of injecting their genes directly into other bacteria. Using complete sentences, explain how this speeds up the process of evolution in bacteria.
Please I need this answered fast!
Answer: By injecting their genes into other bacteria, the receiving bacteria immediately has their DNA instead of having to wait months to create new bacteria. By having new genes, bacteria can be stronger to fight off anything that could harm it.
Explanation:
Bacteria use horizontal gene transfer, particularly conjugation, to rapidly acquire new DNA sequences from other bacteria, enabling faster adaptation and evolution, especially in rapidly changing environments like the presence of antibiotics.
Bacteria accelerate the process of evolution by using a mechanism called horizontal gene transfer, which allows them to acquire large DNA sequences from other bacteria in a single event. This mechanism includes processes such as conjugation, transformation, and transduction. Conjugation, specifically, involves the direct transfer of DNA from one bacterium to another via physical contact, enabling the recipient to acquire new genetic traits that can be beneficial for survival and adaptation, such as antibiotic resistance.
Compared to mutation, which occurs at a slower rate (10-6 to 10-9 per nucleotide per bacterial generation), horizontal gene transfer facilitates the rapid exchange of genetic material, allowing bacteria to quickly adapt to environmental changes. This is crucial when facing selective pressures or new environments, as it may confer an advantage for survival without the need for the lengthy process of mutation-based evolution. With the short generation time of bacteria, sometimes just a few minutes, combined with genetic recombination and a high mutation rate, the capacity for rapid evolution is significantly enhanced, making bacteria highly adaptable organisms.
Which of the following is a type of polar attraction?
O
O
A. A hydrogen bond
B. An ionic bond
C. A covalent bond
D. A metallic bond
SUBMIT
The correct answer is A. Hydrogen Bond. This is a type of polar attraction that occurs when a hydrogen atom experiences the attraction to a nearby highly electronegative atom.
Explanation:The type of polar attraction among the options listed is Hydrogen Bond.
A hydrogen bond is a type of polar attraction that occurs when a hydrogen atom bonded to a highly electronegative atom such as nitrogen, oxygen, or fluorine, experiences the electrostatic forces of attraction to some other nearby highly electronegative atom. This happens because of a significant difference in electronegativity causing the bond between them to be polar.
On the other hand, an ionic bond is formed by the transfer of electrons; a covalent bond is characterized by the sharing of electrons; and a metallic bond involves pooling of electrons.
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What are the 5 factors that must be true for evolution to not occur
The reproductive cells that have half the number of chromosomes as other cells in the body are called gametes.
TRUE or FALSE:
Answer:
falso
Explanation:
Las únicas células humanas que no contienen pares de cromosomas son las células reproductoras, o gametos, que portan solamente una copia de cada cromosoma
The statement is true; gametes are reproductive cells with half the chromosomal content of somatic cells and are produced through meiosis.
The statement that the reproductive cells, which have half the number of chromosomes as other cells in the body, are called gametes is TRUE. Gametes are indeed significant in the process of sexual reproduction as they contain half the genetic material required to form a new organism. Unlike somatic cells (body cells), which are diploid and contain 46 chromosomes (23 pairs), gametes are haploid and carry only one set of 23 chromosomes. These reproductive cells are produced through a special type of cell division known as meiosis, ensuring that each gamete gets just half of the organism's DNA. In humans, the male gametes are called sperm, which are produced in the testes, and female gametes are called eggs, produced in the ovaries. When these gametes combine during fertilization, they form a diploid zygote with the complete set of chromosomes necessary for the development of a human being.
Prokaryotes are found in
A)Eukarya only.
B)Bacteria only.
C)Archaea and Bacteria.
D)Archaea and Eukarya.
First answer gets brainlessness
Answer:
Prokaryotes are found in C) Archaea and Bacteria.
Explanation:
Using evidence from the text describe, the purpose of Golgi complex
Answer:
In the Amazing World Inside a Cell, it says “Golgi complex, a short and narrow structure inside the cytosol. The Golgi complex processes them and sends the molecules to their final destinations inside or outside the cell.” This means that the Golgi complex is like a phone. You send the message on the phone to get to the other person maybe inside or outside your house.
5. Create a script of dialogue that could occur between a
conservationist and a person who lives in a biodiversity
hot spot. The local person wants to use the natural
resources to provide a living for his or her family. The
dialogue should include a compromise in which both
sides are satisfied with the use of resources.
Answer:
Pauline and David are talking about the use of resources in a sustainable manner so that both humans and living organisms can co-exist and enjoy the benefits of nature. Pauline is a conservationist whereas David lives in a biodiversity hot spot. The conversation starts when David and Pauline meet in an ecology conference. Pauline is standing in front of poster talking about conservation of environment and wildlife. David pass by and see that the topic is quite interesting.
David: Hey, I like your topic of presentation.
Pauline: Thank you! are you also a conservationist?
David: I wish I could be but my job nature doesn't allow me to work in this area. However, I truely care about the wildlife which are being threatened in my neighbourhood...
Pauline: Oh, I am sorry to hear that... Where do you live?
David: I live between the city and forest, which is being affected by humans interventions. I see everyday a lot of animals dying on roads because they are forced to migrate because of forest cutting, however, while doing so, they are killed by human's actions.
Pauline: I absoultely hate this behavior of humans. I think human's should understand the importance of other organisms in biogeochemical cycles otherwise our generations are going to pay a lot for this.
David: Definitely, I wish we could reverse such decisions but again, they are not easy. With growing human's populations, we need to adjust everything accordingly.
Pauline: You are right. But we can develop strategies where both humans and animals can live in hormony, such as development of ecological corridors in a forest if we want to make a road, could help these creatures to survive well.
David: I cannot agree more. I hope such things are encouraged in near future. But I really liked your idea and would like to discusss sometime later.
Pauline: Sure, you can visit me anytime in my office at XYZ location.
David: Thank you, see you than!
Pauline: See you!
Final answer:
A script of dialogue between a conservationist and a local person in a biodiversity hotspot was created to find a compromise that includes sustainable livelihood practices like agroforestry or eco-tourism, along with support mechanisms like microloans and community conservation banks.
Explanation:
The dialogue below represents a conversation between a conservationist and a local person living in a biodiversity hotspot who wishes to use natural resources for their livelihood. The conversation aims to reach a compromise that satisfies both the need for livelihood and the importance of conserving biodiversity.
Conservationist: Hi there, I understand that you rely on the resources here to support your family. However, this area is crucial for biodiversity. We need to find a balance that allows you to make a living while preserving our natural heritage.
Local Person: I recognize the importance of conservation, but I need to provide for my family. What solutions can we work on together?
Conservationist: We can explore sustainable methods like agroforestry or eco-tourism, which can generate income for you and protect the environment. Additionally, we can look into microloans or community conservation banks to help you transition to these practices.
Local Person: That sounds promising. I'm willing to try new approaches if it means a stable future for my family and the environment.
Conservationist: Great! Let's work together on training and implementing these methods. We can also involve the community in conservation efforts to ensure a collective benefit.
Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. Single-celled organisms may use cell division as their method of reproduction. Regardless of the reason for mitosis, the process ensures genetic continuity. What is the step in the cell cycle that ensure genetic continuity?
A) B. DNA replication
B) D. Cytoplasmic division
C) B. Translation and transcription
D) C. Cell growth, preparing for mitosis
There are few cells in the body that do not undergo mitosis: most somatic cells divide regularly, some more than others. Take for example the cells that line the digestive tract. These cells must be frequently replaced because they are constantly eroded by the movement of food through the tract. What mechanism(s) is/are in place to ensure that these cells are exact copies of the mother cell?
A) DNA restriction point
B) DNA template plus DNA damage checkpoints
C) the template DNA provides for making copies
D) G0, quiescence checks for damage
The genetic material that is involved in a cell in order to maintain the genetic continuity along with the genetic diversity that is required for the inheritance to go on all lies in the cytoplasm. The correct answer is option B.
What is the genetic unit of inheritance ?Gene is the genetic unit of inheritance.
Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. Single-celled organisms may use cell division as their method of reproduction. Regardless of the reason for mitosis, the process ensures genetic continuity that definitely is the cytoplasm where the genetic material and the genetic units all are present in the cytoplasm.
There are few cells in the body that do not undergo mitosis: most somatic cells divide regularly, some more than others. In this case the check points will help to check the DNA structure and the damage that is being done in the sequence in order to check that a;ll the bases are arranged properly or not.
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In which parts of the world is an equinox most different from the other days in the year?
Answer:
The Poles like North Pole and South Pole
Explanation:
mark brainliest :)
Before mitosis begins, a cell makes a copy if all the DNA in each chromosome. What would go wrong if a cell did not make a second copy of all its DNA before the cell divided into two daughter cells? Be specific.
Each daughter cell would only receive half the genetic information necessary for normal cellular functions.
A cell will divide into daughter cells that carry incomplete genetic material if it is unable to finish its DNA replication before doing so. There could be serious repercussions from this insufficient genetic information, including as developmental problems and genetic disorders.
Crucial cellular functions like transcription and translation would be hampered in the absence of a complete copy of DNA, making it more difficult for daughter cells to carry out vital tasks. In the end, this might result in disease development, cellular malfunction, and possibly even cell death. Therefore, in order to preserve genetic integrity and guarantee the appropriate operation of cells, DNA replication must occur prior to cell division.
What did the presence of photosynthetic prokaryotes allow
A. more oxygen to enter the atmosphere
B. more water to enter the atmosphere
C. more sunlight to enter the atmosphere
D. more hydrogen to enter the atmosphere
Answer:
A. more oxygen to enter the atmosphere
Explanation:
Photosynthesis is a metabolic process unique to the cells of autotrophic organisms, due to the possession of the CHLOROPHYLL pigments used in trapping light energy from the sun. Photosynthesis is the process of combining carbondioxide (CO2) and water (H2O) using energy of sunlight to produce glucose and release oxygen gas.
Based on the understanding of the photosynthetic process which is similar in all photosynthetic organisms including photosynthetic prokaryotes e.g. cyanobacteria, the presence of the photosynthetic PROKARYOTE will allow more oxygen in the atmosphere.
Note that, oxygen is released during photosynthesis.
Whales have what seem like remnants of a pelvis and femur, What are these structures an example of?
transitional structures
analogous structures
vestigial structures
adapted structures
Answer:
Vestigial structures.
Inside a shoe factory, there is a boss that tells the employees how to make different kinds of shoes. There is a door, where the leather to make shoes comes in and finished shoes come out. There are machines that actually make the shoes.
Which organelle does the machine represent?
Answer: The door is the cell membrane
Explanation: cell membranes control what enters and leaves a cell
Answer: The boss is the Nucleus
Explanation: It controls what happens within the cell
Answer: The machine is the Golgi apparatus
Explanation: This organelle processes, sorts, packs and delivers the products to the cell
The machines in a shoe factory analogy represent ribosomes in the cell, which are responsible for assembling proteins, similar to how machines produce shoes from raw materials.
In a cell, ribosomes read the genetic instructions carried by mRNA and assemble amino acids into proteins based on these instructions, similar to the way machines in a factory produce shoes from raw materials based on design specifications.
Ribosomes can be found attached to the rough endoplasmic reticulum, making it appear bumpy, and are responsible for producing many proteins that enter the endoplasmic reticulum where they are modified and packaged. Others float freely in the cytoplasm, contributing to various cellular functions, akin to machines producing different parts or types of shoes in different areas of a factory.
Identify these reaction energy diagrams as spontaneous or nonspontaneous.
Energy
A+B
Reaction Progression
spontaneous
nonspontaneous
Answer:
Explanation:
Answer: Spontaneous, nonspontaneous, spontaneous.
Explanation: edge 2024
HURRY PLEASE HELP ASAP!!!!
1.What is the most common use of water in the United States?
power plants
industry
domestic use
agriculture
2.Which of the following abiotic factors would likely affect humans directly?
humidity
soil pH
water availability
climate change
3. A conservation easement would be best suited to offset which of the following threats to biodiversity?
habitat loss
exotic species
habitat degradation
overharvesting
4. Which of the following would have direct effects on the resources available to a population?
religious beliefs
socioeconomic status of individuals
housing
war
5.If over a 10-year period, a nation of 100 million people has a birth rate of 15 million, but a death rate of 5 million and a net migration rate of 2 million, the population is doing which of the following?
decreasing in size
growing in size
decreasing first and then growing
staying the same over time
Answer:
1. domestic use
2. water availability
3. habitat loss
4. war
5. growing in size
Explanation:
Answer:
1. Power Plants
2. Water Availability
3. Habit Loss
4. War
5. Growing In Size
Explanation:
Melatonin is secreted by
A.the hypothalamus during the day
B.the pineal gland during the night
C.the autonomic nervous system during the winter
D.the thyroid gland during cold seasons
Answer:
B. the pineal gland during the night
Explanation:
Answer:
The answer would be B, the pineal gland during the night.
Explanation:
The secretion of melatonin is triggered by darkness, therefore produced during the night.
will give BRAINLIEST
_______ is a learning tool used only by humans.
A.
Language
B.
Observation
C.
Experience
D.
all of these
Answer:
I think that the answer is A
4.) What can a Punnett Square be used to determine?*.
A the possible combinations of alleles in offspring
B what an offspring will look like
C the height of offspring
D genetic heritage
Answer:
A
Explanation:
thats literally all u do in a punnet square, then u can analyze the data
A Punnett Square is used in biology to determine the possible combinations of alleles in offspring from a genetic cross. However, it can't predict physical characteristics with certainty, or determine genetic heritage.
Explanation:A Punnett Square is a tool used in biology to predict the probability of specific genotypes and phenotypes in the offspring of a genetic cross. It's used to determine A the possible combinations of alleles in offspring. This means it can show the different ways alleles can combine from both parents to create various genetic traits in their offspring. For example, it could reveal the combinations for a gene related to eye color.
While the Punnett Square does provide possible genetic outcomes, it should be noted that it does not determine what an offspring will look like (B), the height of the offspring (C), or genetic heritage (D). These traits are influenced by both genetics and environmental factors, and while genetics can dictate possible outcomes, it cannot determine them with 100% certainty. Therefore, the Punnett Square focuses primarily on potential genetic combinations of alleles.
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Is it possible for a punnet square to have a heterozygous dominant / recessive? I have done my research but not able to find it. I think my teacher is tricking me, is it possible? Please help me, thank you!!!!!
Answer:
I'm not sure if I understand what you mean, but based on your question I think the answer is yes.
If the parents are homozygous dominant, and homozygous recessive, it would produce heterozygous dominant and recessive offspring.
If you used both parents as heterozygous, then approximately 50% of the offspring will be heterozygous as well.
I hope this helped!
Also, as a side note, if the offspring is heterozygous, it'll always show the dominant phenotype (unless it's incomplete or codominance)
The type of cell division where the daughter cells have exactly the same as the parent cells is called
budding
melosis
mitosis
symbiosis
I think the answer is
1.c
Answer:
mitosis
Explanation:
The circulatory system removes waste products from:
blood
cells
blood and cells
1
skin
Answer:
blood and cells
The circulatory system removes waste products from both blood and cells.
Explanation:The circulatory system is a vital component of the human body that serves the crucial role of removing waste products from both the bloodstream and individual cells. It consists of the heart, blood vessels, and blood. As the heart pumps oxygen-rich blood throughout the body, it also collects waste materials, such as carbon dioxide and metabolic byproducts, from various tissues.
This deoxygenated and waste-laden blood returns to the heart and is then pumped to the lungs, where carbon dioxide is expelled and oxygen is replenished. Simultaneously, waste products are filtered by the kidneys, eventually exiting the body as urine. This continuous circulation ensures efficient waste removal and sustains overall bodily functions.
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What is predation???
Answer:
The preying of one animal on others is predation.Answer:
DescriptionPredation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation and parasitoidism.
Explanation:
3- Which two statements describe the effect of smoking cigarettes?
Hi there!!
The answer is C.
The smoke from a cigarette can paralyze or even kill cilia!! Also, when smoking burns little holes in the lungs, the overabundant mucus gathers there. Bacteria and viruses get caught in these pools, causing the smoker to cough forcefully to attempt to remove the excess mucus.
Hope this helps!!