The fins of fishes and flipper of whale are:
(a) Homologous.
(0) Vestigeal
(b) Analogous
(d) None
Homologous
The fins of fishes and flipper of a whale are homologous structures since they have different structure but similar structure
why are eggs of silkmoth stored below 18°c in winter season?
The silkworm cannot survive there because of coldness. And the egg of Silkworm only hatches once it gets the temperature of 18°C to 25°C. So, it can be stored for the desired time below 18°c.
Why are silk moth eggs stored in cold places?Eggs are stored for long periods of time in cold places to prevent larvae from hatching from eggs. During the larval stage of the silk moth's life cycle, silk threads are made. It takes 28-30 days to complete the larval stage.
Oocytes are stored in the ovarian follicle. During a woman's life, numerous follicles and eggs are mobilized to initiate the process of growth and maturation.
Farmers store their eggs in the hygienic and appropriate temperature and humidity conditions. Heat the eggs to the proper temperature to allow the larvae to hatch from the eggs. This happens when the Morus alba tree has fresh leaves.
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What happens during G1 phase
Answer:
D. cytoplasm is manufactured
Explanation:
Which of the following is the function of the nociceptors?
A. Detecting odors in the nose
B. Detecting painful stimuli
C. Detecting central body temperature
D. Detecting touch and pressure
Answer:
B
Explanation:
often referred to as your "pain receptors," are free nerve endings located all over the body, including the skin, muscles, joints, bones, and internal organs.
Detecting painful stimuli is the function of the nociceptors. thus option B is correct.
What do you mean by receptors?A sensory organ or cell responds to light, heat, or other environmental stimuli by sending a signal to a sensory neuron.
The receptors at the end of the axon are known as nociceptors. This receptor reacts to stimulation that has the potential to harm the body. It transmits pain signals between the brain and the body.
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Which of these processes always causes a physical change of the shape of a material?
Answer:
a.) burning
Explanation:
what is the role of the liver
A. it produces urine
B. it makes nephrons
C. it makes all four digestive enzymes
D. it produces bile
The role of the liver is to produce bile.
What is the role of the liver?Bile is a greenish yellow, thick, sticky fluid. It consists of bile salts, electrolytes (dissolved charged particles, such as sodium and bicarbonate), bile pigments, cholesterol, and other fats (lipids). Bile has two main functions:Aiding in digestion.Eliminating certain waste products (mainly hemoglobin and excess cholesterol) from the body.Bile salts aid in digestion by making cholesterol, fats, and fat-soluble vitamins easier to absorb from the intestine.Bilirubin is the main pigment in bile. Bilirubin is a waste product that is formed from hemoglobin (the protein that carries oxygen in the blood) and is excreted in bile. Hemoglobin is released when old or damaged red blood cells are destroyed.To know more about Bile salts, refer to: https://brainly.com/question/15217814
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how do invasive species affect the carbon cycle?
Invasive species can impact the carbon cycle by altering plant communities and vegetation structure, changing nutrient cycling processes, and affecting carbon sequestration or release. They can outcompete native species for resources, which can lead to changes in plant community composition and carbon storage in the ecosystem. Invasive species can also alter soil processes, such as decomposition rates, which can impact carbon cycling.
Explanation:Invasive species can have significant impacts on the carbon cycle. They can affect the carbon cycle by altering plant communities and vegetation structure, increasing the rate of carbon sequestration or release, and changing nutrient cycling processes. Invasive species often outcompete native species for resources such as water, light, and nutrients, which can lead to changes in plant community composition and increased carbon storage in the ecosystem. Additionally, invasive species can alter soil processes, such as decomposition rates, which can impact carbon cycling.
For example, invasive plants with high growth rates and photosynthetic capacity may have higher rates of carbon uptake, leading to increased carbon sequestration. On the other hand, invasive species that alter soil conditions or disrupt nutrient cycles may contribute to increased carbon release through accelerated decomposition or changes in soil carbon storage.
In conclusion, invasive species can have both positive and negative impacts on the carbon cycle, depending on their specific traits and effects on ecosystem processes. It is important to understand and manage the impact of invasive species on the carbon cycle to mitigate the potential negative effects on ecosystem functioning and biodiversity.
Which statement about this figure is false?
Answer:
C
Explanation:
c is NOT the youngest A is
Line E represents a fault line. Option A.
What are fault lines?A fault line in geological formations is a fracture or zone of intense deformation where blocks of the Earth's crust have moved relative to each other.
This movement is a result of tectonic forces, leading to the creation of faults. Faults are categorized based on the direction of relative movement: normal faults involve extension, thrust faults involve compression, and strike-slip faults involve horizontal displacement.
Looking at the image, line E fault causes a break in G, H, and I. The broken factions of these formations can be seen to have moved relative to their parents.
Thus, line E is a fault line.
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HELP PLEEEEEEEEAAAAAAASSEEEEEEEEEEEE
Which is an effect of short-term environmental changes?
A) adaptation
B) speciation
C) extinction
D) death
(5 points)
Answer:death
Explanation:
D)death
I also have a question please check it
A normal human karyotype has
A karyotype is the number and appearance of chromosomes in the nucleus of an eukaryotic cell. The term is also used for the complete set of chromosomes in a species or in an individual organism and for a test that detects this complement or measures the number.
What Is a Karyotype?
A karyotype is simply a picture of a person’s chromosomes. In order to get this picture, the chromosomes are isolated, stained, and examined under the microscope. Most often, this is done using the chromosomes in the white blood cells. A picture of the chromosomes is taken through the microscope. Then, the picture of the chromosomes is cut up and rearranged by the chromosome’s size. The chromosomes are lined up from largest to smallest. A trained cytogeneticist can look for missing or extra pieces of chromosome.
karyotype[1]There are 22 numbered pairs of chromosomes called autosomes. The 23rd pair of chromosomes are the sex chromosomes. They determine an individual’s sex. Females have two X chromosomes, and males have an X and a Y chromosome.
How are the Chromosomes Numbered?
Each chromosome has been assigned a number based on its size. The largest chromosome is chromosome 1. Therefore chromosome 18 is one of the smallest chromosomes in humans.
Human karyotypes: 2n = 48 or 46?
Early studies of the human karyotype simply stained chromosomes within cells with Giemsa and "squashed" them between the cover slip and slide. Most cells were not at the proper mitotic phase for chromosomes to be observed, and chromosome separation was poor. The exact count was uncertain: most workers accepted the number 48. The breakthrough came in 1952 (left) when a technician in the lab of T. C. Hsu accidentally substituted distilled water for the normal saline solution used in washing the cells just before "squashing". This "hypotonic" treatment caused the cell nuclei to swell, and allowed the chromosomes to separate before squashing. A further refinement was "dropping" the cells onto the slide at arm's length, which caused the nuclei to burst on impact, further separating them (middle slide). Finally, the use of a plant spindle-poison Colchicine allows chromosomes to be arrested at mitotic metaphase, during their maximum state of compaction [right] These experiments quickly established the human chromosome number as 2n = 46 chromosomes.
Classification of chromosomes into seven groups by size and relative centromere position established the so-called "Denver System" (right) in 1960. Chromosomes within groups B - G were not readily distinguishable from each other. The X chromosome is in the C group, and the Y is in the G group: males are reconizable by five small G-type chromosomes. Modern banding techniques allow each chromosome in the karyotype to be distinguished individually.
What is the relationship between an individual named Pinus palustris and an individual named Pinus elliottii? (1 point)
Answer:
They are the same genus but different species.
Explanation:
You can tell this because the first name (genus) is the same but the second is different.
They are the same genus but different species this because the first name (genus) is the same but the second is different.
What is Binomial nomenclature?The Binomial nomenclature has been known ask the method by which the naming of the organism is done. Each and every organism has been known by two names. One has been known as the local name and other is global name which is used by all.
The plants and animals has been named just according to the binomial nomenclature in which the first word of the name has been describes the genus of the organism and the second word would represents the species of the organism.
The individual having the name of the Pinus palustris and the Pinus elliottii belong to the same or the similar genus but the different species as their first name has been known as the same.
Therefore, They are the same genus but different species this because the first name (genus) is the same but the second is different.
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Which of these is a landform created due to erosion by glaciers? Delta Horn Sandbars Spit
The answer is option B "horn." The land form horn was formed because when glaciers erode down to form a sharp peak which is called a horn. All of the other options are false because none of those land forms are formed because of the erosion of glaciers only horns are.
Hope this helps.
Answer:
its horn i got that question correct on my 3.09 segment 1 exam
Explanation:
Which action would be completed by skeletal muscle tissue?
Answer:
kicking a soccer ball
Skeletal muscle tissue is responsible for controlling voluntary movements like running or blinking by contracting and moving bones. This action results from the interaction between the actin and myosin proteins within the striated muscle fibers.
Actions completed by skeletal muscle tissue include the control of locomotion and any movement that can be consciously controlled, such as blinking your eyes or running. Voluntary muscle contractions allow our bones to move and are essential for performing all activities of our daily lives. The microscopic structure of these muscles reveals a striated appearance, which is due to the regular arrangement of contractile proteins actin and myosin. When skeletal muscle contracts, it is due to the interaction between these proteins, facilitating movement throughout the body.
Explain how digestion and absorption occurs in the small intestine.
Digestion in the small intestine concludes with enzymes breaking down macronutrients, and absorption is facilitated by villi and microvilli which increase the surface area. Nutrients enter the bloodstream and are routed through the liver for regulation and detoxification. The large intestine finalizes the digestive process by removing water and forming feces.
Digestion and absorption are critical stages in the process of nutrient assimilation that occur within the small intestine, following ingestion and the initial phase of digestion in the mouth and stomach. As food enters the small intestine, it is in the form of chyme—a mixture of partially digested food and stomach secretions. Within the small intestine, digestion concludes as enzymes break down large molecules of carbohydrates, proteins, and lipids into their respective subunits via hydrolysis.
The small intestine is composed of three interconnected segments: the duodenum, jejunum, and ileum. Within the duodenum, digestive enzymes from the pancreas and bile from the liver assist in breaking down macronutrients. The primarily occurs in the jejunum and ileum. The inner wall of the small intestine is extensively folded and covered with tiny finger-like projections called villi, which in turn are covered in microvilli. These structures exponentially increase the surface area for absorption and are lined with epithelial cells that facilitate nutrient uptake into the bloodstream.
Nutrients absorbed through the epithelial cells enter the hepatic portal vein and travel to the liver where detoxification and regulation of nutrients occur before they are distributed throughout the body. In contrast, the large intestine is mainly involved in the removal of water and the formation of feces. This final stage in the alimentary canal involves the absorption of water, remaining salts, vitamins, and the compaction of undigested materials into feces.
A little boy places an ice cube in his hot bowl of stew and then walks out of the room. When he returns, the ice cube is gone.
Based on the law of conservation of mass, what happened to the ice cube in the scenario?
The ice cube melted into water and mixed with the stew, and according to the law of conservation of mass, the mass of the ice cube was conserved and became part of the stew's liquid volume.
Explanation:Based on the law of conservation of mass, when the little boy placed the ice cube in his hot bowl of stew and it disappeared, the ice cube actually underwent a physical change from solid to liquid due to the transfer of heat from the stew to the ice. This heat energy caused the ice to melt and mix with the stew, ensuring that the mass of the ice cube was conserved and became part of the stew's liquid volume.
The mass of the system (the stew and the ice cube together) remained the same throughout the process. Even though the ice cube appeared to have vanished, its mass was still present in the form of water mixed into the stew. Therefore, according to the law of conservation of mass, the total mass before and after the ice cube melted is the same, indicating the ice simply changed state from solid to liquid.
12. What does it mean to be a recessive allele?
a. Give an example:
Answer:
The less important allele.. ish. The allele will only "work" (Show up) if there is two recessive allele. And Ressesive allele is always lower case. So rr will show up but Rr wont because there is a dominant allele. Hope this help. :)
Explanation:
Blue Eye is recessive allele
Brown eye is dominant allele
Which two processes form a cycle, with the products of one process becoming the reactants of the other?
Answer:
Cellular Respiration and Photosynthesis
Explanation:
Cellular respiration uses oxygen and sugar and turns it into water and carbon dioxide, photosynthesis uses water and carbon dioxide and turns it into oxygen and sugar.
19.
Which is not true of animals?
They have coordinated movement.
They develop a blastula.
They make their own food.
They eat dead or living organisms.
Hello There!
They make their own food is not true of animals.
Animals can’t make there own food they need to hunt for it.
Because of its structure, the cell membrane is known as a phospholipid _____.
A. molecule
B. barrier
c. bilayer
D. fluid
Answer:
C - bilayer
Explanation:
Research Question: Why are the carrots that grew on the
left side of the garden larger than the carrots that grew on
the right side of the garden?
Which hypothesis is based on this research question?
A comparison of people with gardens to people without gardens
will show who is likely to live longer.
B. Carrots are thought to be good for your eyesight and should be
eaten regularly.
C. Carrots that are provided lots of sunlight grow to a larger size than
carrots grown in the shade.
D. Eating fresh vegetables every day is a healthy thing to do.
Answer:
The correct answer is option C.
Explanation:
In a scientific method, a hypothesis is a well-substantiated idea or opinion made based on limited evidence for further investigation.
In the given question, the question has been asked based on the observation that "carrots grew larger on the left side than right side" based on which a hypothesis could be suggested which could be tested.
The most valid hypothesis from the options will be" the carrots with more exposure to sunlight will grow larger than which are not exposed to sunlight." This hypothesis can be tested easily by keeping the pots in the sunlight and results can be explained.
Thus, option C is the correct answer.
which of the following is an appropriate problem statement for a science experiment? a. microplastic causes problems fir corral reefs and we want to know exactly what problems are caused b. what is microplastic? c. the effect of microplastic on the gut of small fish is unknown to humans. d. what is the effect of microplastic on the digestion processes of small fish?
Answer:
I believe C
Explanation:
hope this helps.
Answer:
D. what is the effect of microplastic on the digestion processes of small fish?
Explanation:
The structure of this question is perfect for a science project and it also clarifies exactly what problem your solving.
During photosynthesis, plants use
to make sugars and starches.
A)oxygen and carbon dioxide
B)nitrogen and carbon
C)water vapor and sunlight
D)carbon dioxide and sunlight
During photosynthesis, plants use carbon dioxide and sunlight to make sugars and starches. The correct option is option D) carbon dioxide and sunlight.
Green plants, algae, and certain microorganisms transform solar light energy into chemical energy in the form of glucose through a process known as photosynthesis (sugar). Chloroplasts, specialized cell structures predominantly seen in plant leaves, are where this activity occurs.
Sunlight: Chlorophyll, a pigment found in chloroplasts, is used by plants to absorb solar light energy.
Carbon Dioxide (CO2): Via tiny pores on their leaves known as stomata, plants absorb carbon dioxide from the environment.
Chloroplasts: The collected light energy in the chloroplasts powers the production of glucose molecules from carbon dioxide and water.
Glucose Production: During the Calvin cycle, carbon dioxide and water molecules mix in the presence of light energy to create glucose (C6H12O6) and oxygen (O2).
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Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. The decay rates of isotopes are constant and are expressed as .
Answer:
Half Lifes
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Answer:
Half life
Explanation:
The radioactive dating method is usually used to date a rock or a fossil in order to determine its relative age. The unstable isotope elements decays at a certain rate, which normally remains constant and are generally expressed in terms of its half life. Half life is described as the time required by any isotope element to decay half of its original amount. This half life value varies from elements to elements. For example, the half life of Carbon-14 is approximately 5700 years. This half life of an unstable isotope element plays an important role in the radioactive dating method.
Vascular tissue in plants can best be compared to what part of our bodies
Answer:
Blood vessels
Explanation:
Answer:Blood vessel
Explanation:
what happens during prophase
Answer:
Chromosomes become visible, the nucleolus disappears, the mitotic spindle forms, and the nuclear envelope disappears. Chromosomes become more coiled and can be viewed under a light microscope. ... The nuclear envelope disappears at the end of prophase.
Explanation:
Answer:
Prophase is the first phase of M-phase of cell division which is marked by many changes taking place in the dividing cell which are:
1. Chromatin condenses and becomes more coiled.
2. Chromosomes are seen as a pair of sister chromatids with a centromere.
3. Nucleolus-site of rRNA synthesis disappears.
4. Mitotic spindle- formation begins between two pairs of centrioles.
5. Nuclear envelope- disappears at late prophase.
A single strand of DNA helix consists of 100 nitrogenous base pairs. On one strand, 36 of the bases are adenine and 24 are cytosine. For the complementary strand of DNA, which would complete the proper base pairing?
36 guanine
36 thymine
24 cytosine
24 thymine
Answer:
36 thymine
Explanation:
DNA is a polynucleotide having double helical structure. The Each helix of DNA is made of nucleotides. Each nucleotide has a pentose sugar, phosphate and a nitrogenous base. Both the helices are joined by corresponding bases through hydrogen bond. The base pairing in the DNA double helix is specific. The purine adenine (A) always pairs with the pyrimidine thymine (T) the purine guanine (G) always pairs with the pyrimidine cytosine (C). Therefore, the number of adenine is 36 then the number of thymine will be 36. Similarly if the number of cytosine is given 24, then the number of guanine will be required 24 not 36.
The frequency of alleles in a population that is in hardy Weinberg equilibrium?
a . Changes in each successive generation
b. Is less important than the frequency genotypes
c. shows evidence of the process of natural selection
d. Remains the same over several generations
The answer would be D.
HWE states that genotype and allele frequencies in a population remain constant from generation to generation when evolutionary influences are absent(such as gene flow or natural selection).
Final answer:
The frequency of alleles in a population that is in Hardy-Weinberg equilibrium remains the same over several generations as long as no evolutionary forces act on them. If frequency changes are observed, it indicates that the population may be evolving.
Explanation:
The Hardy-Weinberg principle outlines the conditions under which the frequency of alleles in a population remains constant over generations. This equilibrium assumes that no evolutionary forces are acting on the allele frequencies. The correct answer to the question is d. Remains the same over several generations. The principle hook on an ideal situation where there is no natural selection, no mutations, no gene flow, no genetic drift, and random mating occurs. If these conditions are met, the allele frequencies should remain unchanged from generation to generation, which implies that the population is not evolving. However, if observed allele frequencies deviate from expected values, scientists can infer that evolutionary forces are influencing the population.
what is a long-term benefit of healthy eating?
Answer:
You will live longerIt will reduce risk of cancer, diabetes, and other diseasesRestless tectonic plates move (shift) between one and fifteen centimeters per __________. year month day minute
Hello There!
Restless tectonic plates move (shift) between one and fifteen centimeters per "YEAR"
Tectonic plates move at a moderate around one and fifteen centimeters per year. The plates move in different ways, once in a while crashing into one another.
Answer:
YEAR
Explanation:
7.
The blood component responsible for clothing is
(a) Lymphocyte (b) Erythrocyte (c) Thrombocytes (d) Leucocytes
Answer:
C. Thrombocytes
Explanation:
Thrombocytes are also known as platelets. When you get a cut and a blood vessel gets injured, the thrombocytes are triggered by the bleeding. So what they do is that they clump up together forming some sort of a plug on the damaged area to stop the bleeding. The name thrombocytes actually came from a Greek word which literally means "clot".