An rna molecule that can catalyze chemical reactions is called a(n) _____.
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.
Exocrine glands, smooth muscles and cardiac muscles are controlled by the _________.
a.peripheral nervous system
b.somatic motor division
c.autonomic system
Airway management can be challenging in patients with down syndrome because their:
How is biological control used for battling pests?
Projections from the cell that move materials and mucus are:
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.
A deep sense of well-being results when our need for relatedness is satisfied in balance with our psychological needs for competence and
Darwin referred to the process of promoting certain traits by breeding members with those traits as _______.
Darwin referred to the process of promoting certain traits by breeding members with those traits as Artificial selection.
What is Artificial selection?Artificial selection is the process of identifying desirable qualities in plants and animals and then taking action to strengthen and pass those traits on to succeeding generations.
Artificial selection operates in a similar manner to natural selection, with the exception that in natural selection, these judgments are made by nature without human intervention.
In laying out the evidence for his theory of evolution by natural selection in his 1859 book, On the Origin of Species, the British naturalist and biologist Charles Darwin highlighted the physical traits and behaviors of several species of bird called finches.
Therefore, Darwin referred to the process of promoting certain traits by breeding members with those traits as Artificial selection.
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The lipid that makes up most of the lipids in our body is:
What organism uses carbon dioxide in the air?
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.
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.
What creates recirculating currents and turbulent waters that can swamp boats and drown boaters?
Recirculating currents and turbulent waters that can swamp boats and drown boaters are caused by factors in physics, particularly in fluid dynamics. Ocean currents and the movement of large objects can create vortices and turbulence.
Explanation:The recirculating currents and turbulent waters that can swamp boats and drown boaters are caused by a combination of factors in physics, particularly in fluid dynamics. One factor is the ocean currents, which can create vortices and turbulence. Another factor is the movement of large objects, such as boats and airplanes, which create significant turbulence as they move through the water or air.
Problems in regulating _____ are related to both anorexia nervosa and bulimia nervosa. serotonin epinephrine tryptamine dopamine
What would be the effect of damage to the auditory association area in the left hemisphere?
Which trophic level do anacondas and jaguars fill in the Amazon rainforest
Answer: Tertiary Consumer
Explanation:
I just did edge. Also, I don't think betertiary is a word. :/
Formation of the transcription initiation complex begins when general transcription factors bind to a segment of dna called the ____________ .
First-generation antipsychotics influence ______ receptors, whereas second-generation antipsychotics influence ______ receptors.
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.
what are some comparisons with the compound light microscope and a transmission electron microscope
Which is used as an energy source by polar bears and orange trees?
sunlight
glucose
glycogen
starch
Glucose is used as an energy source for polar bears and orange trees.
Acanthostega is an extinct amphibian. Fossils indicate that it had four limbs, lungs, gills, and a tail used to propel itself through water. Why are Acanthostega fossils considered transitional fossils?
A. They display evidence of a form between an ancient fish and a modern bird.
B. They display evidence of a tetrapod with lungs.
C. They display evidence of gills and a fin-like tail.
D. They display evidence of a intermediate form between a fish and a tetrapod land animal.
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.
The protein that maintains proper proportion and concentration of water in blood is
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.
Human hands are delicate and efficient instruments. each one contains 27 bones, one more than each human foot. each also contains muscles and tendons which react to nerve stimuli. it is these reactions which enable people to clench and grasp. the thumbs are, perhaps, the most important part of each human hand. they are opposable, which gives them their unique movement. besides humans, only apes have opposable thumbs. the ability to grasp is probably responsible for much of human progress.
The passage focuses on the anatomy of human hands, specifically the 27 bones, muscles, and tendons, as well as the importance of opposable thumbs, which serve a significant role in our ability to manipulate objects and have contributed to human evolution.
Explanation:The passage provided appears to be discussing the anatomical structure and importance of human hands. The 27 bones, along with muscles and tendons that respond to nerve stimuli, provide the unique ability to clench and grasp. This capability is enhanced by the presence of opposable thumbs, a feature shared only by humans and apes. The opposability of thumbs is a significant functional feature, allowing for precision grip and the manipulation of objects. This characteristic is likely a contributing factor to human evolution and progress, enabling the development of tools and complex tasks.
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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.
Which brain region processes the emotional significance of stimuli and generates immediate emotional and behavioral reactions?
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