The small air sacs in the lungs through which gases are exchanged are the
The "Father of Modern Taxonomy" is _____.
from where do the gems used in jewelry come?
A. They are non-metallic silicate B. They are metallic minerals C. They are non-metallic minerals D. They are metallic ore
The gems commonly used in jewelry come from mining efforts and are usually classified as non-metallic minerals.
Jewelry uses a wide variety of gems and other valuable elements such as:
Sapphires EmeraldsGoldSilverTopazand many more. These gems and elements all have distinct properties and therefore classifications.
Gold and silver are considered metallic ore. They are mined and have properties of metals. One of these defining properties is that both gold and silver may be melted and used to produce other substances. However, though they are used in jewelry, they are not considered to be gems.
Gems in jewelry are those that cannot be melted into other substances and have only a dull, submetallic shine, except the diamond. Gems are unique and desired for their colors. Their lack of shine comes from their relatively low refractive index. This is a property common to nonmetallic minerals. Therefore option C is correct.
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from the time of my beginning, my part was made of fibrous material called collagen, which is secreted by
A cell with a predominance of rough endoplasmic reticulum is most likely ________. a cell with a predominance of rough endoplasmic reticulum is most likely ________. producing large quantities of carbohydrates for storage in the vacuole producing large quantities of proteins for secretion producing large quantities of proteins in the cytosol producing large quantities of carbohydrates to assemble an extensive cell wall matrix
A cell with a predominance of rough endoplasmic reticulum is most likely producing large quantities of proteins for secretion.
FURTHER EXPLANATIONThe endoplasmic reticulum is the organelle which is responsible for the modification of proteins synthesized by the ribosomes and the production of lipids. There are two sections of the endoplasmic reticulum: rough endoplasmic reticulum and smooth endoplasmic reticulum.
The rough endoplasmic reticulum is where the modification of proteins that will be transported out of the cell takes place. It is called “rough” because it looks like it is studded on its surface with ribosomes where proteins are synthesized. These proteins get modified in the rough endoplasmic reticulum through addition of side chains or folding. Phospholipids are also made in the rough endoplasmic reticulum. These are important components of cellular membranes. All the modified proteins and phospholipids are transported out of the rough endoplasmic reticulum to their destinations via the vesicles.
The smooth endoplasmic reticulum, meanwhile, is the site for carbohydrate, steroid and lipid synthesis. It is considered smooth because of the limited number or absence of ribosomes on its surface.
Producing large quantities of carbohydrates for storage in the vacuole
FALSE: carbohydrates synthesis is not a function of the rough endoplasmic reticulum; the rough endoplasmic reticulum modifies proteins that are for extracellular use.
Producing large quantities of proteins for secretion
TRUE: this is exactly what the rough endoplasmic reticulum does.
Producing large quantities of proteins in the cytosol
FALSE: protein synthesis happens in ribosomes which are floating on the cytosol; proteins on the surface of the rough endoplasmic reticulum are transported outside the cell.
Large quantities of carbohydrates to assemble an extensive cell matrix
FALSE: carbohydrate synthesis is not a function of the rough endoplasmic reticulum
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A unique blue is a blue that has no _______ or green tint.
Which of the following statements about the cells of any multicellular organism is true?
The same genes are expressed in each cell.
Almost all of the cells have the exact same DNA.
Each cell has completely different DNA.
Different genes are expressed in different types of cells.
Answer:
Almost all of the cells have the exact same DNA.
Explanation:
All organisms perform _____, whether or not oxygen is present.
A). Glycolysis
B). Aerobic respiration
C). Photosynthesis
D). None of the above
Answer: Glycolysis
Explanation:
Glycolysis is an universal process which takes place in all the organism from bacteria to humans. It can occur whether oxygen is present or not. It is the first step of cellular respiration that takes place in cytosol.
During glycolysis, breakdown of the glucose into pyruvate occurs with the formation of two energy molecules of ATP and two NADH molecules.
Thus, the correct answer is option (A).
A pregnant woman is admitted to the hospital with a diagnosis of placenta previa. which action would be the priority for this woman on admission
What is the function of mitochondria in cells?
A.Storing water
B.Packaging proteins
C.Forming lipids
D.Producing energy
Energy production in cells occurs as a result of oxidative phosphorylation in the mitochondria.
The correct answer is D
What are the mitochondria's primary roles?Membrane-bound cell organelles known as mitochondria (mitochondrion, singular) produce the majority of the chemical energy required to fuel cellular metabolic operations.
What occurs if the mitochondria fail to function?The lack of energy in the cells is caused by damaged mitochondria. Damage is caused by the cells' accumulation of unneeded oxygen and fuel molecules. Different mitochondrial diseases can have different symptoms. It relies on the number of faulty mitochondria and their location in the body.
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What is the cause of the hyperpigmentation seen in people with cushing syndrome?
a. permissive effects of aldosterone when cortisol levels are altered
b. hypersensitivity of melanocytes with sun exposure
c. elevated levels of acth
d. abnormal levels of cortisol?
You are dispatched to a 22 y/o male that crashed on his mountain bike and is c/o difficulty breathing. you arrive on scene to find the pt sitting up in the middle of the trail speaking in one to two word sentences and clutching the left side of his chest. upon further evaluation you discover that your pt has altered loc, bp of 110/76, hr 140 and tachypnea at 28 bpm. what state of shock is your pt in?
What is the original source of variation that natural selection can act upon?
The original source of variation that natural selection can act upon is genetic diversity in a population, which comes from mutation and sexual reproduction.
Explanation:The original source of variation that natural selection can act upon is primarily genetic diversity in a population, which comes from two main sources: mutation and sexual reproduction.
Mutation, a change in DNA, is the ultimate source of new alleles or new genetic variation in any population. It can result in an individual having a trait different from other individuals. The changes caused by mutation can provide beneficial, harmful or neutral effects on an organism's phenotype which is a critical aspect for natural selection.
Sexually reproducing species also contribute to genetic diversity through unique combinations of alleles assembling to produce unique genotypes in offspring. Natural selection can only act if there is variation among individuals in a population, and this variation must be genetically based.
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Which of the following represents a chemical change?
Select one: a. rocks being smoothed by rapid water movement b. the pink color of a rose c. iron's attraction to a magnet d. decomposition of stone due to acid rain
A(n) _____ includes all living and nonliving things in an environment.
A. community
B. ecosystem
C. population
D. landform
An ecosystem includes all living and nonliving things in an environment. Hence the correct option is b.
An ecosystem encompasses all living and nonliving components within a specific environment, working together as a functional unit. It includes not only the various plant and animal species (populations) present but also the physical factors such as soil, water, climate, and geological features (landforms) that interact with these organisms. Ecosystems are characterized by the flow of energy and the cycling of nutrients, with different species playing roles in these processes.
For instance, plants capture sunlight and convert it into energy through photosynthesis, herbivores consume plants, and carnivores prey on herbivores, forming complex food webs. Additionally, the nonliving components, like water and soil, influence the distribution and abundance of species. Ecosystems vary in size, from a small pond to a vast rainforest, but they all share the fundamental principle of interconnectedness, where the living and nonliving components interact and influence each other's dynamics. Understanding ecosystems is crucial for ecological studies, conservation efforts, and managing environmental resources sustainably. Hence the correct option is b.
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Which term refers to a sperm count of less than 20 million/ml?
Which obesity-related condition involves an abnormally high number of fat cells?
What types of movements do we see among the lipids in the membrane?
The type of cell division that creates two identical cells, each with 46 chromosomes is called _______________________.
The type of cell division that creates two identical cells, each with 46 chromosomes is called mitosis.
What is mitosis?
A cell prepares for cell division by replicating its chromosomes, segregating them, and creating two identical nuclei during the mitotic phase. The cell's contents are typically evenly divided into two daughter cells with identical genomes after mitosis.
Mitosis can be compared to copying an instruction manual. Give two copies of each page, one to each of the two recipients. A cell copies each chromosome during mitosis and distributes one copy to each of its two daughter cells.
The copies must be flawless. No omissions or misspellings. If we don't, we could be unable to follow the directions, and anything might go wrong. Mitosis follows the same pattern.
Therefore, The type of cell division that creates two identical cells, each with 46 chromosomes is called mitosis.
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Which description best contrasts skeletal and smooth muscle tissue? Skeletal muscle tissue contains no bands, whereas smooth muscle tissue is streaked with bands. Skeletal muscle tissue stores energy and blood, whereas smooth muscle tissue controls movement. Skeletal muscle tissue regulates muscles attached to bones, whereas smooth muscle tissue regulates the heart. Skeletal muscle tissue controls voluntary movements, whereas smooth muscle tissue controls involuntary movements.
Skeletal muscle tissue controls voluntary movements and has a striped appearance, while smooth muscle tissue controls involuntary movements and lacks the striped appearance.
Explanation:The best contrast between skeletal and smooth muscle tissue is that skeletal muscle tissue controls voluntary movements while smooth muscle tissue controls involuntary movements. Skeletal muscle tissue forms skeletal muscles, which attach to bones or skin and control locomotion and any movement that can be consciously controlled. They are also characterized by their striped or striated appearance under a microscope due to the regular arrangement of contraction proteins. On the other hand, smooth muscle tissue occurs in the walls of hollow organs like the intestines, stomach, and blood vessels, and it controls involuntary movements. Smooth muscle does not have the banded or striated appearance because their cells are arranged in sheets instead of bundles, and each cell has a single, centrally located nucleus.
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Which statements could be categorized in the "Asexual" section of the Venn diagram? Check all that apply.
mitosis
diploid cells
two cell divisions
gametes
identical DNA
The right answer are : mitosis, diploid cells, and identical DNA.
The answers "two cel divisions" and "gametes" refers to a division by meiosis which is a sexual reproduction.
Asexual reproduction or asexual reproduction is a mode of reproduction, which - as opposed to sexual reproduction - corresponds to the capacity of living organisms to multiply alone, without a partner, without involving the fusion of two gametes of opposite sexes. Asexual reproduction is observed in multicellular (animal and plant) and unicellular organisms. In botany, the term often used for the asexual multiplication of plants is vegetative multiplication. In all cases of asexual reproduction, the result is identical to the mother.
What are brown bears doing as a result of panting
Answer:
Maintaining body temperature by cooling down
Explanation:
Brown bears have adaptive strategies to lower down the body temperature during hot months. Under hot sunny day, their breath rate is increased with shallow breaths. This is called as panting. The shallow breaths allow the cooler air to circulate over the moist mouth surfaces and leads to lower down the body temperature.
The main difference between desert and tundra biomes is _____. moisture content of the air limited topsoil amount of precipitation temperature
Answer:
temperature
Explanation:
What are some factors that can regulate enzyme activity?
Why are unsaturated fatty acids particularly abundant in the cellular membranes of antarctic fish?
Antarctic fish have a higher proportion of unsaturated fatty acids in their cellular membranes to maintain membrane fluidity in cold environments.
Explanation:Antarctic fish have a higher proportion of unsaturated fatty acids in their cellular membranes because unsaturated fatty acids help maintain fluidity in cold environments. In cold temperatures, saturated fatty acids become compressed and make the membrane less fluid and more rigid, which can lead to rupturing. On the other hand, unsaturated fatty acids have kinks in their tails that elbow adjacent phospholipid molecules away, maintaining space between the phospholipid molecules and preserving membrane fluidity. This adaptation allows Antarctic fish to survive in the cold temperatures of their environment.
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Mycorrhizae are associations formed by fungi that grow on the roots of trees. These fungi penetrate into the roots of the trees. The trees produce energy through photosynthesis and share it with the fungi. The fungi act as decomposers, breaking down dead organic matter to provide nutrients for the trees to grow. What kind of a relationship is exhibited in this example? The fungi share a mutualistic association with the trees. The fungi are a parasite for trees. The fungi share a commensal association with the trees. The fungi are predators for the trees.
Answer: The fungi share a mutualistic association with the trees.
Mutualism is a relationship among two species, in which two species lives in close association with each other. In this relationship both the species are benefited.
The given situation, is an example of mutualistic association of the fungal species with the tree. This is because of the fact that the fungal species provides trees with nutrients after the process of decomposition, that are necessary for the growth of the trees. In return the fungal species obtains carbohydrates produced by photosynthesis from the roots of the trees. Therefore, both the species are benefited hence, it is a mutualistic association.
Answer: A.
The fungi share a mutualistic association with the trees.
Explanation:
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Although the doctors can find no physical reason for his symptoms, aaron reports that he is unable to feel anything with any part of his left hand from the wrist to his fingertips. aaron has a
a. neurocognitive disorder.
b. a physical problem due to compulsive hand-washing.
c. conversion disorder.
d. dissociative disorder.
An older female client tells the nurse in the clinic that she has a cystocele that was diagnosed a year ago. she has urinary frequency and burning on urination. the client asks, "the primary healthcare provider wanted me to have surgery for the cystocele last year; but, i can manage with peripads. it won't hurt not to have surgery, will it?" how should the nurse respond?
Which description applies to the prominent transverse lines located on the anterior surface of the sacrum?
Which microscope would be most useful for quickly estimating the number of red blood cells in a patients blood sample
Im pretty sure it is electron