Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, which develop from similar embryonic tissues. These structural similarities are an example of homologous structure.
What are homologous structures?A homologous structure is an organ or bone that appears in multiple animals, emphasizing physical similarities that demonstrate ancestry from a common ancestor.
In other words, it occurs when bones from very diverse animals appear to be very similar in form or function and appear to be linked. The wing of a bat and the arm of a human are two classic examples of homologous structures.
Both have similar internal bone structures, and their evolutionary origins as mammals are clear.
Therefore, the structural similarities are an example of homologous structure.
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Why is the fact that all cells throughout the body have complete sets of dna, a useful fact for forensic scientists?
What is the function of the immune system? It exchanges oxygen and carbon dioxide. It provides structure for the body. It eliminates waste from the body. It responds when pathogens enter the body.
The statement 'it responds when pathogens enter the body' BEST describes the function of the immune system.
The immune system refers to different biological mechanisms and cellular components aimed at protecting the organism from diseases.The immune system is composed of specific cells (e.g., T cells) and molecules (e.g., inflammatory cytokines and immunoglobulins) that recognize specific pathogens in order to destroy them.The pathogenic microorganisms (e.g., bacteria) contain specific antigens that can be recognized by the components of the immune system.In conclusion, the statement 'it responds when pathogens enter the body' BEST describes the function of the immune system.
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The measure of how a particular food affects blood glucose levels is the ______ index. glycemic glucose glycogen glyceride
Roly-poly bugs will move around in no particular direction until they find a suitable moist spot this kind of random movement in animals is known as what
Answer:
Kinesis
Explanation:
Innate behaviours are behaviours that occur naturally in animals in response to external stimuli. These reflexes, taxis and kinesis.
Reflex actions are actions that occur involuntarily in response to external stimuli.
Kinesis is a non directional movement of organisms in response to external stimuli.
Taxis is a directional movement of organisms in response to external stimuli. It could be towards the stimuli or away from it.
In this case, the roly-poly bugs move aound in no direction until they find a suitable moist spot. This is certainly a kinesis.
The step in the scientific method in which a scientist compares experiment results with a hypothesis is___.
a. analysis
b. communication
c. observation
d. question
You have arrived at the scene of a motor vehivle collision to find that there are several crit
Which is a condition that occurs when muscles weaken or shrink due to little use?
ugh yuck biology .....help if you can .-.
Explain why a high-carbohydrate diet increases the time to exhaustion during intense aerobic exercise.
Can an experiment that has several variables be used to explain a theory
The study of the similarities and differences in the embryos of different species
The study of the similarities and differences in the embryos of different species is called comparative embryology.
What is comparative embryology?
Comparative embryology delves into scrutinizing and contrasting embryos from diverse species, unraveling the intricacies of their developmental processes, structures, and sequences. This field intricately examines the parallels and disparities in the initial phases of growth among organisms.
Through meticulous examination of embryonic progression across species, scientists glean insights into evolutionary connections and unravel threads of shared lineage. This discipline unveils common traits among distinct organisms, shedding light on their evolutionary narratives and interconnectedness.
Furthermore, it aids in deciphering the mechanisms and pathways of development, elucidating their variations or similarities amid different species.
Complete question:
The study of the similarities and differences in the embryos of different species is called ___
For older adults and previously inactive individuals, exercise intensity should fall closer to what percentage of the maximal heart rate?
What had to be invented before we could discover Saturn and Neptune
A plant that reproduces sexually has flowers that contain both male pollen and a female ovary. The plant cross-pollinates and forms a fleshy fruit around its seeds. Which of the following is the most logical conclusion about the classification of this plant?
Coniferophyta
Anthophyta
Cycadophyta
Gnetophyta
Answer: It is the anthophyta.
Explanation: Taking the test right now
When a sperm cell penetrates an egg and the two cells fuse together, a diploid zygote forms.
True False
What are the three particles of an atom
What reaction prevents more than one sperm from binding to an oocyte during fertilization?
Final answer:
The reaction preventing more than one sperm from binding to an oocyte during fertilization is composed of a fast block altering the membrane potential and a slow block changing the membrane structure to release proteins that inhibit additional sperm fusion.
Explanation:
The reaction that prevents more than one sperm from binding to an oocyte during fertilization involves two key mechanisms activated by the oocyte. Once the first sperm fuses with the oocyte, a fast block to polyspermy occurs, in which the membrane potential of the oocyte alters quickly, often called a "wave of negativity." Subsequently, a slow block follows, involving a change in the membrane structure itself, which releases proteins that prevent other sperms from fusing with the oocyte. These blocks are essential; without them, polyspermy could occur, leading to a nonviable embryo due to having an incompatible triple set of chromosomes.
A pulmonary perfusion imaging procedure is performed to diagnose pulmonary embolism and pulmonary trauma. the code for this procedure allows for imaging a patient:
The classification of a puma is given below. What is the puma's order?
Animalia, Chordata, Mammalia, Carnivora, Felidae, Puma, concolor
Puma
Animalia
Carnivora
Chordata
The distance, measured in degrees, north and south of the equator is referred to as _____.
the prime meridian
the arctic circle
longitude
latitude
Answer;
-Latitude
Explanation;
-The distance, measured in degrees, north and south of the equator is referred to as latitude.
-Latitude is the measurement of distance north or south of the Equator. It is measured with 180 imaginary lines that form circles around the Earth east-west, parallel to the Equator. These lines are known as parallels. A circle of latitude is an imaginary ring linking all points sharing a parallel.
-The Equator is the line of 0 degrees latitude. Each parallel measures one degree north or south of the Equator, with 90 degrees north of the Equator and 90 degrees south of the Equator.
Latitude is an angular measurement that indicates the position of a location on the Earth's surface relative to the equator. The distance, measured in degrees, north and south of the equator is referred to as latitude.
The equator is defined as 0 degrees latitude and is the reference point for measuring latitude. As one moves north of the equator, the latitude increases in positive values, while moving south of the equator results in negative values.
Latitude lines, also called parallels, are imaginary horizontal lines that circle the Earth parallel to the equator. They are evenly spaced and become progressively smaller as they move away from the equator towards the poles. The maximum latitude is 90 degrees at the North Pole and -90 degrees at the South Pole.
Latitude is a geographic coordinate that determines a location's position in relation to the equator. It is measured in degrees, with 0 degrees representing the equator, positive values representing the northern hemisphere, and negative values representing the southern hemisphere.
Latitude lines run parallel to the equator and are used to establish horizontal positions on the Earth's surface.
Therefore, the distance, measured in degrees, north and south of the equator is referred to as latitude.
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Two reasons why it is easy to harvest perlemoen
Perlemoen is reasonably easy to take available of the ocean and do not really required huge and expensive equipment. The poachers take out millions of rands worth of Perlemoen with relatively simple and cheap equipment such as wet suites, googles and flippers. The most expensive equipment they use are their boats and vehicles. In comparison with the lucrative industry the costs of poaching are low. Perlemoen are often the smaller, younger abalone of the species that are taken because they are quite simply and easier to harvest.
1. The younger perlemoen are found closer to the shoreline and often bunched together and they can get a whole whack of them at one spot.
2. The strandlopers harvested the perlemoen from the rocks during low tide without the need for diving.
Increased secretion of aldosterone would result in a(n) ______________ of blood ____________? increase, potassium decrease, volume increase, calcium levels decrease, ph increase, sodium
The ________ layer is composed of dense irregular connective tissue whose strength and toughness results from abundant _________ fibers
A man who carries an allele of an x-linked gene will pass it on to
Which is bigger a minha bird or a parrot?
ow do scientists continue to gain a better understanding of the structure of atoms?
By studying atoms under a large microscope
By conducting experiments that expose their properties
By examining only the largest atoms
By splitting them apart
The roman numeral v indicates the ________ nerve.
A plant that is homozygous for red flowers is crossed with a plant that is homozygous for white flowers. in the case of incomplete dominance, the flowers of the offspring will be
Incomplete dominance is defined as the genetic condition, in which a reduced ratio of the dominant allele is expressed. The offspring produced by the purebred parents is an intermediate between the two genotypes.
Let the genotype for purebred red flowers be - RR
Let the genotype for purebred white flowers be - WW
The cross between the true-breeding parent will is RR x WW.
The cross between purebred red and purebred white flowers will result in 100% pink progeny due to incomplete dominance.
Incomplete dominance is the phenomenon in which the dominant allele is expressed in the reduced ratio, such that the dominant allele does not mask the recessive allele completely, resulting in an intermediate offspring.
Therefore, the incomplete dominance will result in all the pink flowers, an intermediate between red and white flowers.
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A cluster of symptoms that regularly occur together is known as a:
Veins returning to the heart can close to prevent the backflow of blood. Which component in the veins contributes to this process?
Final answer:
The one-way valves in veins prevent backflow of blood, ensuring unidirectional flow toward the heart and are aided by muscle contractions and venoconstriction.
Explanation:
The component in the veins that prevents the backflow of blood is the one-way valves. These valves ensure blood flows in only one direction toward the heart, even when the pressure within the veins is low, especially after blood has passed through the capillaries. The valves are crucial because muscular contractions can increase pressure within the veins, potentially pushing blood in the wrong direction. Instead, the valves close and prevent backflow, allowing for the unidirectional flow of blood. The action of muscle contractions, especially those of the skeletal muscles, helps push blood through these valves, aiding venous return to the heart, in a mechanism sometimes described as the skeletal muscle pump. Additionally, maintaining vascular tone through venoconstriction enhances blood flow, preventing veins from excessively distending.