which of the following best describes the main idea of the endosymbiotic theory
Modern-day mitochondria evolved from simple prokaryotic cells taken up by larger prokaryotes. The endosymbiotic theory describes how complex organelles in eukaryotic cells, such as mitochondria and chloroplasts, evolved from independent prokaryotic cells that were taken up by larger prokaryotic cells.
The endosymbiotic theory explains the origin of eukaryotic cells and their complex organelles. According to this theory, modern-day mitochondria and chloroplasts evolved from independent prokaryotic cells that were engulfed by larger prokaryotic cells, leading to the first eukaryotic cells. The correct description of the main idea of the endosymbiotic theory is 'Modern-day mitochondria evolved from simple prokaryotic cells taken up by larger prokaryotes.'
Complete Question:
Which of the following best describes the main idea of the endosymbiotic theory?
Modern-day mitochondria evolved from simple prokaryotic cells taken up by larger prokaryotes.
Large prokaryotes ingested smaller eukaryotes that became modern-day chloroplasts.
Eukaryotic cells evolved from primitive mitochondria that engulfed ancient prokaryotes.
Ancient photosynthetic prokaryotic organisms evolved into modern ribosomes.
The period of life in which the ability to reproduce begins—in females, it is the period when the female reproductive organs are fully developed—is known as
The term being described above is puberty for this is the stage where an individual is in the stage of becoming an adult and allows changes in their physical appearance, making it more mature and fully developed. It does not allow only physical change but it also allows reproductive organs to develop, having females to reproduce.
Puberty is defined as the period of life in which the power to reproduce beginnings in females, it is the duration when the female reproductive organs are completely developed.
What is puberty?Puberty is the process of bodily differences via which a child's body grows into an adult body competent for sensual reproduction.
It is created by hormonal communications from the brain to the lovemaking gland of the ovaries in a girl, the testes in a boy.
The term is described above is puberty, for this is the set where someone is in the stage of becoming an adult and allows differences in their physical formation, making it more casual and fully developed.
It does not permit only physical change, but it also permits fertile organs to develop, having females reproduce.
Therefore, the term used in the above case is puberty.
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Which of the following is an example of qualitative data?
A. A solution contains copper ions
B. A plant has five flowers
C. A solar system has nine planets
The protein that maintains proper proportion and concentration of water in blood is
a hypothesis must be:
a) created from data collected over a long period of time
b) a statement that most people would agree with
c) answered with another hypothesis
d) based on logical thinking and available knowledge
A client reports that she has a terrible headache that doesn’t go away. the client keeps asking what time her son will be in to visit her. the son died two weeks ago, and that is when the headache started. the nurse recognizes this behavior as: displacement conversion identification reaction formation
A marine scientist wants to understand the effects of pressure on deep sea organisms. Unfortunately, the harsh environment of the deep sea makes it difficult to make long-term observations in areas of high pressure. What research method would best allow him to overcome this limitation in studying these organisms
Answer:
Using submersible would be the best method that allow him to overcome the limitation like pressure in studying organism in the deep sea.
A submersible is a small vessel made up of high-quality metal made for underwater research that can bear the high pressure of deep sea. Submersibles are different from submarines because submarine is used mainly for defense purpose by navy.
Submersibles can be both unmanned and manned. In manned submersible, it has a glass window through which scientists can observe the deep-sea creatures and a light source which enlightens the dark area in the deep sea.
Unmanned submersibles are remotely controlled and have fitted cameras that provide information to the scientist so they are called remotely operated vehicles(ROVs).
What would be the effect of damage to the auditory association area in the left hemisphere?
Formation of the transcription initiation complex begins when general transcription factors bind to a segment of dna called the ____________ .
Fruit flies all look more or less alike to most people. if you collect a male and female fruit fly, how could you test the hypothesis that they are the same biological species
"what cell gives rise to all formed elements?"
Hematopoietic stem cells in the bone marrow give rise to all formed elements, including red and white blood cells and platelets. This happens through a process called hematopoiesis, during which these stem cells differentiate into different cell types.
Explanation:The cell that gives rise to all formed elements is the hematopoietic stem cell. Found in the bone marrow, these cells are responsible for the production of all blood cells: red blood cells, white blood cells, and platelets. Through a process called hematopoiesis, these stem cells differentiate into various types of blood cells. For example, they can turn into myeloid progenitor cells that eventually become red blood cells, platelets, or certain types of white blood cells. Alternatively, they can become lymphoid progenitor cells, which lead to different types of white blood cells.
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Problems in regulating _____ are related to both anorexia nervosa and bulimia nervosa. serotonin epinephrine tryptamine dopamine
Maintaining internal conditions within in an organism is a characteristic of life known as _____. metabolism energy cells homeostasis
Answer: Homeostasis
Explanation:
Homeostasis can be define as the tendency of the body of the living being to regulate and maintain the internal environment constant with respect to the changes occurring in the external environment. Homeostasis is necessary for sustaining the life of the organism during unfavorable conditions.
Which is a characteristic of unsaturated fats? they easily stack on top of each other. they come from plant steroids. they make up most animal fats. they are liquids at room temperature?
They are liquids at room temperature
The ph of the gastric juice of the stomach is about 2 due to the formation of hcl. where does this formation of hcl occur?
Airway management can be challenging in patients with down syndrome because their:
First-generation antipsychotics influence ______ receptors, whereas second-generation antipsychotics influence ______ receptors.
In a bacterium, we will find dna in _____.
In a bacterium, DNA is found in the nucleoid. The nucleoid is a region within the bacterial cell where the genetic material, which is a single circular chromosome, is localized.
Unlike eukaryotic cells, bacteria lack a true nucleus, so the DNA in a bacterium is not enclosed within a membrane-bound organelle. Instead, it is loosely organized in the nucleoid region, located in the cytoplasm of the bacterial cell. The nucleoid contains not only the main chromosomal DNA but also various proteins that help in the organization and regulation of genetic material.
In addition to the nucleoid, bacteria may also contain smaller, circular pieces of DNA called plasmids. Plasmids are separate from the main chromosome and can carry genes that provide the bacterium with additional functionalities, such as antibiotic resistance or the ability to produce certain toxins.
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Body's major metabolic hormone is called
Insulin, produced by the pancreas, serves as the major metabolic hormone in the body, mainly controlling glucose levels.
Explanation:The body's major metabolic hormone is called insulin. It is produced by the pancreas and plays a significant role in metabolism by facilitating glucose uptake into the cells in our body. In other words, insulin allows our bodies to use sugars from carbohydrates in the food that we eat for energy or to store glucose for future use. Insulin helps keeps our blood sugar level from getting too high or too low.
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The major metabolic hormones in the body are thyroxine (T4) and triiodothyronine (T3), produced by the thyroid gland. They regulate the body's basal metabolic rate, impacting energy and heat production. Other significant metabolic hormones include catabolic and anabolic hormones that regulate the breakdown and synthesis of molecules, respectively.
Explanation:The body's major metabolic hormone is mostly referred to as the thyroid hormones, specifically, thyroxine (T4) and triiodothyronine (T3). These hormones are produced by the thyroid gland and significantly influence the body's basal metabolic rate - the amount of energy used by the body at rest. They do this by entering target cells and binding to intracellular receptors located on the mitochondria, triggering an increase in nutrient breakdown and oxygen consumption to produce ATP. Moreover, T3 and T4 initiate the transcription of genes involved in glucose oxidation, promoting energy production and heat generation, a phenomenon known as the hormone's calorigenic effect.
It's also worth mentioning other hormones like catabolic and anabolic hormones that play key roles in regulating metabolic processes in the body. Catabolic hormones like cortisol, glucagon, adrenaline/epinephrine, and cytokines stimulate the breakdown of molecules, resulting in energy production, while anabolic hormones such as growth hormone, insulin-like growth factor, insulin, testosterone, and estrogen are required for the synthesis of molecules.
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An rna molecule that can catalyze chemical reactions is called a(n) _____.
What is the source of energy used to power the sodium-potassium pump?
The sodium-potassium pump is powered by the hydrolysis of ATP, an energy-releasing process, which allows the transport of sodium and potassium ions against their concentration gradients, an energy-requiring process.
Explanation:The source of energy used to power the sodium-potassium pump is adenosine triphosphate, also known as ATP. This pump functions by moving sodium and potassium ions in opposite directions across the cell membrane, specifically against their respective concentration gradients, a process which requires energy.
For each pump cycle, three sodium ions are transported out of the cell and two potassium ions are moved into the cell. This pump plays a vital role in maintaining the correct concentrations of sodium and potassium in living cells.
Therefore, the sodium-potassium pump is powered by ATP hydrolysis. This is an example of energy coupling, which is the use of energy released from an exergonic (energy-releasing) reaction to drive an endergonic (energy-requiring) process.
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The source of energy used to power the sodium-potassium pump is ATP (adenosine triphosphate).
The sodium-potassium pump, also known as Na+/K+-ATPase, is an integral membrane protein that actively transports sodium and potassium ions across the plasma membrane of animal cells. It helps maintain cell potential and regulate cellular volume.
The pump operates by hydrolyzing ATP to provide the energy necessary to transport ions against their concentration gradients.
For every ATP molecule hydrolyzed, the pump transports three sodium ions out of the cell and two potassium ions into the cell. This process is essential for the functioning of nerve and muscle cells, as it ensures proper signal transmission and muscle contraction.
Exocrine glands, smooth muscles and cardiac muscles are controlled by the _________.
a.peripheral nervous system
b.somatic motor division
c.autonomic system
When writing a binomial name, it is usually entirely?
1.Capitalized
2.Boldfaced
3.Italicized
4.All of the Above
Answer:
Italicized
Explanation:
The binomial name of a species is a way to write its scientific name in such a way that the name consists of the genus followed by the species.
When writing the binomial name, the rule of the binomial nomenclature has to be followed which are:
1. The genus name is written first.
2. The species name is written next after space.
3. the entire name is either italicised or underlined separately.
As populations in North America grow, so does the need for wood to build houses, stores, and other buildings. Select the statement that best describes the long-term global effects of this behavior.
Compare the shape and structure of the amoeba to the spirogyra. explain how the differences allow each type of cell to survive. think about how they get their energy.
Final answer:
An amoeba utilizes pseudopodia for mobility and ingesting food, supporting its predatory and heterotrophic lifestyle, while spirogyra's rigid filamentous shape and chloroplasts optimize photosynthesis for autotrophic energy production.
Explanation:
Comparing the shape and structure of an amoeba to the spirogyra reveals significant differences that allow each to survive in their respective environments. Amoebas are characterized by their amoeboid movement facilitated by pseudopodia, which are extensions of the cell that can reach out and anchor to surfaces, pulling the cell forward. This structure supports its predatory lifestyle, allowing the amoeba to move and engulf food particles in an amoeboid manner.
On the other hand, Spirogyra is a filamentous green alga composed of cylindrical cells that stack end to end, forming long, slender filaments that float in fresh water. Spirogyra cells contain helical arrangements of chloroplasts that enable them to efficiently perform photosynthesis. The rigid filamentous structure of Spirogyra supports floating and allows maximum exposure to sunlight, which is crucial for their energy-derivation strategy through photosynthesis.
The amoeba's flexibility and motility facilitate a heterotrophic mode of receiving energy by engulfing organic matter, whereas Spirogyra's chloroplasts and filamentous structure are well-suited for an autotrophic lifestyle, using sunlight to synthesize organic compounds. These structural adaptations are key to their survival and dictate their differing modes of energy acquisition.
What kind of water makes up a lake? Select the three correct answers.
A. Freshwater
B. Seawater
C. Groundwater
D. Melted water
Answer: The correct answers are-
A. Freshwater C. Groundwater and D. Melted water.
Lake is a body of water that is surrounded by land. It mainly comprises of freshwater, but sometimes it also contains a salty water ( having very low salinity that is low salt concentration).
Type of water that can contribute a lake is Freshwater, groundwater ( which is also freshwater) and melted water ( such as in case of water movement in the form of tunnels below the ice masses).
Thus, options A), C), and D) are the right answers.
The condition of albinism is caused by the lack of pigmentation in an animal. Which of the following could be a possible explanation for this rare condition? Select all that may apply.
The mRNA incorrectly reads the code for the protein pigment melanin from the DNA during transcription
The tRNA does not read the code correctly from the DNA in translation
A white pigment is formed turning the animal white The process of replication is stopped in the animal.
The earths crustal plates move due to what current
Where's the nictitating membrane located?
Answer:
Eyes
Explanation:
Nictitating membrane is located in the eyes. It is knows as the "third eyelid". In some vertebrates, a thin membrane is found beneath the lower eyelid that has the ability to extend and cover the entire eyeball. It is transparent or translucent and thus allows vision to some extent even when it covers the eye. It also removes dirt from the eye and maintain its moisture content.
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