Archaebacteria are prokaryotes do not have a nuclear envelope. Thus, option B is correct.
What are the characteristics of Archaebacteria ?These are the ancient organism on earth, classified as bacteria, belongs to the kingdom Archaea
There share some common features with eukaryotes and extremophilic and obligate anaerobe in nature as they can survive under extreme condition and grow in absence of oxygen.
So they under go in the process of methanogenesis and called as methanogens.
Their cell membrane is made up of lipids and cell wall is composed of Pseudomurein, which provide protection them against adverse effect.
The thick cytoplasm of archaebacteria have all the essential elements required for nutrition and metabolism.
They reproduce asexually and are different from both prokaryote and eukaryote in terms of ribosomal RNA. They do not perform photosynthesis.
Hence, option B is correct.
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In an electron microscope, the sample is bombarded with a stream of electrons that are expelled from an electron gun. The electrons interact with the sample component, the result of which is transformed into an image. Why do you think electron microscopes allow for greater magnification than compound microscopes?
Answer:
It is because the electron microscope uses a shorter wavelength electron
Explanation:
In an electron microscope the sample is always bombarded with a stream of electrons. These electrons usually have shorter wavelengths.
The electrons interact with the sample component well, the result of which is transformed into an image which is always clearer and allows for greater magnification than the compound microscope as a result of the short wavelength electrons being used.
Answer:
Due to the shortened wavelength electron it causes a greater magnification than compund microscopes.
What scientific knowledge about macromolecules is a direct result of Gerardus Johnannes Mulder’s 1838 discovery? All proteins contain carbon, hydrogen, oxygen, and nitrogen. All carbohydrates contain carbon, hydrogen, and oxygen. Nucleic acids are polymers with nucleotide monomers. The helical structure of DNA is essential for protein production.
Answer:
All proteins contain carbon, hydrogen, oxygen, and nitrogen.
Explanation:
edge
As per the Gerardus Johnannes Mulder’s 1838 discovery, all proteins contain carbon, hydrogen, oxygen, and nitrogen. The correct option is A.
What is Gerardus Johnannes Mulder’s 1838 discovery?Mulder used the descriptor protein in his 1838 document, "On the composition of some animal substances," after Jons Jacob Berzelius suggested it.
He also proposed in the same journal that animals get the majority of their protein from seedlings, which was known as protein.
Mulder was the very first to posit a stipulates the factors that cause distinctions in chemical and physical behavior when revealed to reagents between albumin, casein, and fibrin and other substances more or less similar to them.
All proteins, according to Gerardus Johnannes Mulder's 1838 discovery, contain carbon, hydrogen, oxygen, and nitrogen.
Thus, the correct option is A.
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How many rounds of division are there when one cell in the testis becomes four sperm cells?
Answer:As a result of the two meiotic divisions, each primary spermatocyte produces four spermatids. During spermatogenesis there are two cellular divisions, but only one replication of DNA so that each spermatid has 23 chromosomes (haploid), one from each pair in the original primary spermatocyte
Explanation:
Binary fission occurs in which of the following type of organsim?
Answer:
A. Prokaryotes like bacteria
Explanation:
Binary fission is a type of asexual reproduction (requiring only one organism, as opposed to sexual reproduction, which requires two) occurs when an organism itself splits into two - hence binary (bi- means two).
Binary fission occurs most often in prokaryotes; eukaryotes like plants and animals engage more in sexual reproduction because they are more complex.
The answer is thus A.
HEEELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Answer:
30. L
31. R
32. R
33. L
34. L
Answer:
[tex]30)\blue{100cm = 1m}[/tex]
[tex]\boxed{\blue{ = L}}[/tex]
[tex]31)\green{1Mm = 1000000m}[/tex]
[tex]\boxed{\green{ = R}}[/tex]
[tex]32)\pink{1km = 1000000mm}[/tex]
[tex]\boxed{\pink{ = R}}[/tex]
[tex]33)\purple{1000micro \: \: \: meter} \\ \purple{ = 1mm}[/tex]
[tex]\boxed{\purple{ = L}}[/tex]
[tex]34)\red{1000000mm = 1km}[/tex]
[tex]\boxed{\red{ = L}}[/tex]
How is the endosymbiotic theory used to support the emergence of eukaryota
Answer:
It involves a cooperative relationship between two cells
Explanation:
allow both to survive—and eventually led to the development of all life on Earth.
A wave is known to have a frequency of 20 Hz and wavelength of 0.5 m. Find the velocity of this wave.
Answer:
take 20 * 0.5 to get 10 m/s
Explanation:
3. Because plants don’t have interior or exterior skeletons, they rely on their cell walls to give them structural support. Did you see evidence of this cell structure in plants? How was it different from the animal cells (the blood cells, cardiac muscle, and skin)? 4.The paramecium was the only unicellular organism that Stella viewed through her microscope. All the other organisms were multicellular. How was the unicellular specimen different from the multicellular organisms? 6. Why do you think electron microscopes allow for greater magnification than compound microscopes?
Answer:
3. Plant cells are arranged in tight squares due to their cell walls and are filled with water. These characteristics give the plant a structural support.
Categorize Different Foods Categorize the food items below by selecting which macromolecule they are known to contain. apple steak celery olive oil potato avocado egg
Answer:
The correct categorization of the listed food items would be:
Carbohydrate: apple, celery, potato
Protein: Steak, egg,
Fat: Olive oil, avocado.
The four major macromolecules are carbohydrates, proteins, lipids, and nucleic acids.
Foods like apple, celery, and potato are rich in carbohydrates.
Foods like chicken, meat, eggs, et cetera are rich in proteins.
Similarly, foods like olive oil, mustard oil, butter, et cetera are rich in fats or lipids.
Explanation:
Answer: apple- carb; steak- protein; celery- carb; olive oil- lipid; potato- carb; avocado- lipid; egg- protein
Explanation:
Fruit and veggies are mainly made of carbohydrates because that is the storage and structural components they use (think glucose, cellulose, starch, etc.); Steak is a meat, and meat is technically muscle- muscle is built from protein; Olive oil and avocado are lipids because they are considered fats; Egg is protein because it is an animal by-product, and contains many amino acids, which build up proteins.
Which of these does not determine an ecosystem carrying capacity for a population?
A. Food
B. Space
C. Migration
D. Water
Please answer it’s urgent would be very helpful . Thank you so much !
If the number of photosynthetic organisms on the earth decreased drastically, which would happen as a result? Less water would be available on the earth’s surface. Less solar energy would reach the earth’s atmosphere. More oxygen gas would be found in the atmosphere. More carbon dioxide gas would be found in the atmosphere.
Answer:
More carbon dioxide gas would be found in the atmosphere.
Explanation:
Photosynthetic organisms convert carbon dioxide in air to oxygen through photosynthesis, while other non-photosynthetic organisms only consume oxygen and release carbon dioxide through respiration, they do not undergo photosynthesis.
When the number of photosynthetic organisms on the earth decreased drastically, the carbon dioxide released from other non-photosynthetic organisms cannot be converted to oxygen, so carbon dioxide in air accumulates.
*ANSWER ASAP TY*
Rainforests are destroyed so cash crops can be planted. What are cash crops?
a.) plants that grow slowly and are sensitive to moisture
b.) plants that are grazed by cattle
c.) plants that produce flowers that resemble money
d.) plants that grow quickly and have many uses
Rainforests are dense and canopied trees rich in biodiversity. They are destroyed to plant the cash crops that grow quickly and have various uses. Thus, option D is correct.
What are cash crops?Cash crops are plants that grow rapidly and have many uses that benefit the economy. They are planted mainly for selling purposes and to make a profit.
Cash crops like sugar cane, tomatoes, cotton, tea, coffee, etc. are planted to make a profit and earn money and differ from the agricultural crops as they are planted generally for sale purposes.
Therefore, cash crops are fast-growing crops.
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I need help on this question will give brainly points must be right.
Answer:
3
Explanation:
The answer is three, I just did it
What factor determines how much linoleic acid can twist and bend its shape?
A. The weight of the molecule
B. The number of carbon-hydrogen bonds
C. The length of the molecule
D. The number of carbon-carbon double bonds
Mendel’s pea plants had either purple or white flowers. This means that the plants can self-pollinate. have two recessive traits. have two alleles for the gene. have two copies of a gene from one parent.
Answer:
I think it's that they have two alleles for the gene
The statement that Mendel’s pea plants had either purple or white flowers means that the plants have two alleles for the gene.
MENDEL'S LAW:Gregor Mendel is regarded as the Father of genetics due to his immense contribution to knowledge of genetic inheritance.
According to Gregor Mendel, a gene consists of two alleles, which individually encode different phenotypes of a particular trait.
In this question involving flower color gene, two alleles coding for purple (P) and white color (p) are present in the gene.
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What can plant fossils reveal about the area in which they are found? Question 3 options: A. The air pressure and ocean currents at the time the plant was living B. The type of animals that were present at the time the plant was living C. The types of rocks and minerals in the area at the time the plant was living D. The climate/temperature at the time the plant was living
Answer:
i think option B is correct answer because plants also gets nutrient from the animal so , there is more chance to get the information about the animals that were found in that area and time.
hope it helps..
What additional evidence
do we have today that
supports Darwin's theory?
A. Cell theory
B. DNA and molecular evidence
C. Process of photosynthesis
D. Method of protein synthesis
Answer: The answer is A cell theory.
Explanation: For our cells to be as developed and complex as they are today a huge evolutional process was necessary. This process is explained in the cell theory
DNA and molecular evidences are the additional evidences to support Darwin's theory. The correct option is B.
What is Darwin's theory?According to Darwin's theory, all species of organisms emerge and develop through natural selection of slight, inherited variations that significantly raise the individual's capacity to compete, stay alive, and reproduce.
It is backed up by research from a wide range of scientific disciplines, as well as genetics, which shows that DNA from different species is similar.
Fossils, embryological studies, anatomical and morphological characteristics, and molecular biology are examples of evidence that support the theory of evolution by comparing DNA sequences.
Thus, the correct option is B.
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Which process produces human egg and sperm cells?
Answer:
Hey there! Your answer will be below.
Explanation:
The answer to your question is gametogenesis or meiosis ( which produces gametes....From meiosis it becomes or forms into gametes.)
So the answer should be gametogenesis/ meiosis....
Hope that helps!
By: xBrainly
Meiosis or gametogenesis is the process that produce human egg and sperm cell.
What is meiosis?Meiosis is a type of reproduction in which a parent cell divide into four daughter cells that are genetically different from the parent cell. The daughter cells have half number of chromosome of the parent cell.
This process produce the gametes which are the sperm cell and egg cell.
Therefore, Meiosis or gametogenesis is the process that produce human egg and sperm cell.
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How do mutations occur
Answer:
Mutations can occur when a strand of DNA copies itself during cell division.
Mutations can lead to many disorders, and can be damaging.
Hope this helped! :)
Answer:
Mutations can occur when DNA replication errors are made or not made in time
Explanation:
3. Were you able to restore the land? Why or why not?
Answer:
yes yes I was
Explanation:
I invested with money for crops and bammo bingo land back!!!
What does Saccharomyces cerevisiae (Baker’s yeast) need to survive?
Answer:
Food (Sugars)
Explanation:
S. cerevisiae feeds on sugars for energy, in the process producing carbon dioxide and alcohol (this is fermentation in a nutshell). The carbon dioxide bubbles get trapped in the dough, creating the lift that makes the dough rise. The alcohol, meanwhile, evaporates when baking, transforming into gas that also contributes to the rise of the bread. The alcohol, along with acids produced during the fermentation process, impart that wonderful flavor and aroma associated with yeast-leavened breads.
Please if anyone could answer this question? Will mark brainliest!!
Explain the process of gaseous exchange in the alveoli of the lungs.
Answer: Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. Inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
Answer:
carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
Explanation:
Scientists often ask questions to clarify data or guide scientific research. What are two scientific questions you have that
could clarify relationships about the DNA or traits of these orchids?
Answer:What traits would orchids have if the MADS-box genes were not duplicated?
If the genetic mutation changed the shape of the flowers, would pollinators still be attracted to the orchids?
Explanation: The example given by Plato
If the genetic mutation changed the shape of the flowers, would pollinators still be attracted to the orchids.
What is Genetic mutations?The DNA sequence of a gene is altered to generate a different result, which is known as a genetic mutation. The DNA sequence of that gene is permanently altered.
For humans to develop, which is the process of change over a number of generations, genetic variances are crucial. In one person, a spontaneous genetic mutation takes place.
The genetic mutation of that person is passed down through generations (hereditary) to their offspring. If the mutation increases a person's likelihood of survival or immunity to disease, it starts to be handed down through generations and disseminated throughout the community.
Therefore, If the genetic mutation changed the shape of the flowers, would pollinators still be attracted to the orchids.
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Read the passage from Darwin's journal. These two species of Amblyrhynchus agree, as I have already stated, in their general structure, and in many of their habits. Neither have that rapid movement so characteristic of the genera Lacerta and Iguana. They are both herbivorous; although, the kind of vegetation on which they feed is so very different. Mr. Bell has given the name to the genus from the shortness of the snout; indeed, the form of the mouth may almost be compared to that of the tortoise: one is led to suppose that this is an adaptation to their herbivorous appetites. It is very interesting thus to find a well-characterized genus, having its marine and terrestrial species, belonging to so confined a portion of the world. The aquatic species is by far the most remarkable because it is the only existing lizard which lives on marine vegetable productions. As I at first observed, these islands are not so remarkable for the number of the species of reptiles; as for that of the individuals, when we remember the well-beaten paths made by the thousands of huge tortoises—the many turtles—the great warrens of the terrestrial Amblyrhynchus—and the groups of the marine species basking on the coast-rocks of every island—we must admit that there is no other quarter of the world where this order replaces the herbivorous mammalia in so extraordinary a manner. What differences did Darwin find about the two species? One is fast, while the other is slow. One eats plants, while the other eats meat. One lives inland, while the other lives in the water. One has a long snout, while the other has a short snout.
Answer:
One lives inland, while the other lives in the water.
Explanation:
Amblyrhynchus cristatus is a marine reptile that lives in the Galápagos Islands. This species attracted the attention of Darwin because it is a marine iguana that lives exclusively in the Galapagos and, interestingly, their close relatives inhabit in land, also in the Galápagos Islands. The marine and land iguanas from Galápagos form a phylogenetic clade that is characterized by high diversification levels, which are evidenced by conspicuous phenotypic differences. These species can hybridize with each other, but the offspring are infertile. Recently, it has been shown by using phylogeographic analysis that both species diverged 8-10 million years ago.
Answer:
They both eat plants.
Explanation:
They are both herbivorous; although, the kind of vegetation on which they feed is so very different.
Which pair of terms best describes a wooden table?
biotic and nonliving
biotic and living
abiotic and nonliving
abiotic and living
Answer:
Biotic and non-living
Explanation:
=> Since it can't move,respire, ingest or reproduce , it is a non-living thing.
=> It is a component derived from the living part of an ecosystem(A wooden tree), so it is a biotic component.
the advantage to a plant i’m having more than one pigment is shown by the absorption of:
A) Violet and red light by chlorophyl a and blue and orange light by chlorophyl B
B) Violet and blue light by chlorophyl a and orange, and red light by chlorophyl B
C) Violet, blue, green, and red light by carotene
D) Green, and yellow light by chlorophyl a, chlorophyl B, and carotene
Answer:
B) Violet and blue light by chlorophyl a and orange, and red light by chlorophyl B
Explanation:
Chlorophyll is the pigment present in green plants which is used in the process of photosynthesis by trapping solar energy for use. Chlorophyll comprises of two types namely: Chlorophyll A and Chlorophyll B
Chlorophyll A is known to absorb light in the blue-violet region while chlorophyll B absorbs light in red-blue region. These pigments however don’t absorb green light but they instead reflect it. This makes option C and D invalid. The closest option in their properties is however B.
If the number of photosynthetic organisms on Earth decreased drastically, which would happen as a result? Less water would be available on Earth’s surface. Less solar energy would reach Earth’s atmosphere. More oxygen gas would be found in Earth’s atmosphere. More carbon dioxide gas would be found in Earth’s atmosphere.
If photosynthetic organisms are decreasing on Earth there is no consumption of carbon dioxide, hence option 4 is correct.
How much carbon dioxide Earth’s atmosphere?The amount of oxygen in the atmosphere will likewise decrease as the number of photosynthetic species rises.
More carbon dioxide gas would be found in the atmosphere because forests, especially rainforests, create more oxygen. The development of oxygenic photosynthesis was the most significant metabolic advancement in Earth's history.
It liberated life from the finite supply of reductants drawn from geochemistry and allowed it to create energy and reduce power directly from sunshine and water.
Therefore a decrease in photosynthetic organisms increases the carbon dioxide gas in Earth’s atmosphere.
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A_____ Cell is one that has one copy of each chromosome
Answer: Haploid
Explanation:
A Haploid cell that has only one copy of each chromosome which can be paternally or maternally-derived
I hope this helped
Wildlife experts may attempt to restore the population of an individual species ?
by changing the food web of the ecosystem.
by moving the species to a rain forest.
through captive breeding.
by introducing an exotic species into the population.
Answer:
C
Explanation:
through captive breeding. Once they are breed, they should be released
What is your hypothesis for the numbers of each phenotype after 32 fertilizations (HINT: Use a Punnett square to come up with the ratio and then determine how much of each if you have 32 individuals.)
Answer:
I need more clarification on what to use in the punnet square
Explanation: