Answer:
Las aletas de una ballena y el brazo de un hombre son un ejemplo de órganos homólogos, porque la estructura ósea de las aletas de una ballena es parecida (homóloga) a la estructura ósea de nuestros brazos, debido a que ambas proceden del mismo origen embrionario pero se han modificado para desempeñar funciones ...
Pros and cons about lobsters not feeling pain…
Answer:
The pro of not feeling pain is not feeling pain and the con is pain help you survive like hot hand on stove if u don’t feel pain you probably won’t take your hands off and it can cause death and stuff (u probably know what I mean I hope)
Explanation:
reasons for classifying organisms
Answer:
To be able to sort them into different groups
Biomass is a :
(a) Dry weight of living organism
(b) Fresh weight of living organism
(c) Dry weight of dead organism
(d) Fresh weight of dead organism
(1) only a (2) a,b (3) c,d (4) only c
Answer: 1. only A
Explanation: bio means living
Answer:
(a) Dry weight of living organism
hope this help you
The prevalence of CRE infections in health care settings has increased significantly in recent years, in part because these organisms are able to share plasmid-encoded resistance genes. Which method of horizontal gene transfer is most likely responsible for transfer of the plasmid between bacteria
Answer:
Bacterial conjugation
Explanation:
Carbapenem-resistant Enterobacterales (CRE) are different types of bacteria that lead to infections in healthcare settings. Moreover, a plasmid is a small piece of DNA that can replicate independently from the bacterial chromosome. Bacterial conjugation is a type of horizontal gene transfer by which plasmids are transferred from one bacterium referred to as 'donor' into another called 'recipient' by sex pili. Plasmid transfer is unidirectional and depends on physical contact between bacterial cells. In this case, it is expected that this type of DNA transport mechanism occurs among patients occupying the same rooms in healthcare settings.
Khi nói về các hoocmôn tuyến tụy, phát biểu nào sau đây sai?
Explanation:
The exocrine component of the pancreas is the pancreatic islets. The endocrine cell of the pancreas produces hormone insulin. The major hormones released by the endocrine gland inside the pancreatic are glucose and glucagon, which control blood glucose levels, and cortisol, which inhibits insulin and glucagon production.
The presence of a negative allosteric effector on an allosteric protein would: a. cause a shift to the left in the sigmoidal curve. b. increase the number of R conformations. c. decrease the cooperativity of the substrate. d. raise the apparent value of the equilibrium constant, L. e. increase the likelihood of the binding of S.
Answer:
d. raise the apparent value of the equilibrium constant, L.
Explanation:
Allosteric regulation is a type of regulation of an enzyme by binding an effector molecule at a site other than the protein's active site (i.e., the allosteric site). The equilibrium constant (L) refers to the transition between two forms of an allosteric protein in absence of a ligand. The properties of allosteric enzymes are explained by conformational changes associated with a low-affinity tense (T) state, or a high-affinity relaxed (R) state. Negative allosteric effectors are molecules that bind to the allosteric site on an enzyme in order to decrease its activity, thereby leading the enzyme to a low activity T state and thus increasing the value of the equilibrium constant.
Based on his experiments, Mendel concluded that each trait was controlled by two _____.
what is the term for female reproductive cell ?
Answer:
female reproductive call are called ova
What is an example of a direct effect that would result from an increase in deer mouse in this food web
Answer: increase in predator population.
Explanation: mouse deer are prey for some animals like tigers. So if their population increased, the tiger's also will or the predators'. Then it will immediately be followed by a decrease in both the prey and the predator's population.
Câu 6: Gà có 2n =78. Vào kỳ trung gian, sau khi xảy ra tự nhân đôi, số nhiễm sắc thể trong mỗi tế bào là:
A. 78 NST đơn. B. 78 NST kép. C. 156 NST đơn. D. 156 NST kép.
Câu 7: Ở người (2n = 46), số NST trong 1 tế bào tại kì giữa của nguyên phân là:
A. 23 NST đơn. B. 46 NST kép. C. 46 NST đơn. D. 23 NST kép.
Câu 8: Ở ruồi giấm, có bộ NST 2n = 8 vào kỳ sau của nguyên phân trong một tế bào có:
A. 8 NST đơn. B. 16 NST đơn. C. 8 NST kép. D. 16 NST kép.
Answer: 6A 7D 8B
Explanation:
The Channel Islands are a series of small islands off the California coast. Each island has a genetically distinct population of foxes. Compare the population of foxes on one of these islands to the population of foxes in the forests of mainland California. Which is more likely to be impacted by genetic drift? Which is more likely to be at Hardy-Weinberg equilibrium?
Answer:
The fox population on the Islands experiences genetic drift whereas foxes in the forests has Hardy-Weinberg equilibrium.
Explanation:
The fox population on the Islands experiences genetic drift because there is no chance of introduction of different type of foxes in these Islands which experiences less variation in the population of already existing foxes. Genetic drift is the change that occur in the frequency of an existing gene allele in a population due to random sampling of organisms. Genetic drift may cause gene variants to disappear completely with the passage of time which leads to reduce genetic variation. The foxes that is located in the mainland forest experiences Hardy-Weinberg equilibrium.
A eukaryotic cell carries out phagocytosis and engulfs a gram-negative bacterial cell, which ends up in the resulting food vacuole. Hypothetically, to go from the cytosol of this bacterial cell to outside of the eukaryotic cell that has taken it in, what is the least number of biological membranes that would have to be crossed
Answer: 3
Explanation:
Lysozyme and the food vacuole are both membrane bounded organelles. Then to go out of the eukaryotic cell, it has to pass through the cell membrane
The alpha male and female of a wolf pack produce offspring, but the rest of the individuals in the pack do not. This is an example of
O biotic potential
O group behavior
O intraspecific competition
O interspecific competition
Answer:
group behavior
Explanation:
The production of offsprings of males and females in the group is an example of the group behavior of the pack of wolves. This is best seen in lions and another big cat family. These acts are directly and indirectly inflected by the group decisions.Answer: group behavior
Explanation:
Why do water molecules "stick together"?
Answer:
Water molecules tend to stick together due to the structure and charge of the atoms present in the water. Hydrogen atoms are positively charged while oxygen atoms are negatively charged. ... All water molecules are exerting cohesive forces on all the molecules around them including those on the surface of a body of water
Certain types of dwarfism are inherited in an autosomal dominant pattern. What is the likelihood that two heterozygous dwarf parents produce a child without dwarfism? A. 0% B. 25% C. 75% D. 100% ng is not anobaonic trait
Answer:
B. 25%
Explanation:
Make a punett square that crosses both heterozygous parents (Dd)
All the squares that had one or two capital Ds inherited dwarfism and the one square with no capital Ds did not inherit dwarfism
In an experiment, researchers find that certain neurons in the visual cortex preferentially fire in response to a bar of light that is oriented at a specific angle, and that different neurons similarly respond to bars of light oriented at different angles. This finding provides the strongest evidence for:
Answer:
Feature detection
Explanation:
Feature detection involves different neurons that are activated in response to specific stimuli. For example, feature detectors are activated in the cerebral cortex through visual stimuli of specific shapes or patterns. These neurons become more and more complex as the stimuli also become progressively more complex and specific. Featured detector neurons have been identified in the toad vision, where they have been involved in the toad's behavior in response to worm-like moving stimuli (e.g., orienting), and the bat auditory cortex, where they have been involved in the measurement of the distance between the bat and its prey.
On your first research mission you make an amazing discovery by finding a new species living in the hostile environment of the Sahara desert. After observing it carefully you determine that it is not an autotroph, it is multicellular, and it does not contain any chitin. What is the best classification for it
Answer:
Animalia
Explanation:
A multicellular organism is an organism composed of two or more cells. Multicellular organisms include animals (i.e., organisms from kingdom Animalia), plants, and most fungi. Moreover, an autotroph is a living organism that can produce its own food by using materials from inorganic sources (e.g., water, carbon dioxide, etc); whereas a heterotroph is an organism that cannot produce its own food and thereby needs to eat other organisms, like plants or animals, to survive. Multicellular autotrophs are typically plants; whereas multicellular heterotrophs include all animals, fungi and some parasitic plants. Finally, chitin is a polysaccharide (polymer) of N-acetylglucosamine, which is found in the cell wall of fungi, as well as in the exoskeleton of some animal groups such as, for example, insects, crustaceans, etc.
How can ecological factors influence in pond ecosystem? Discuss it with suitable examples with respect to its structural and functional aspects?
The ecological factors influence in pond ecosystem by providing the basic structure and materials that the ecosystem needed.
Oxygen, carbon dioxide, water, light and nutrients are the abiotic factors whereas the biotic components are algae, bacteria, protozoa and other organisms are the ecological factors that greatly influence the pond ecosystem. If one of the factor is missing or eliminated from the pond ecosystem the whole ecosystem will disturb and can't work properly. For example, if light is eliminated from the ecosystem, no producers can grow and ultimately death and destruction of the whole ecosystem occurs.
https://brainly.com/question/24312891
Ecological factors, such as temperature or trophic relationships between organisms, influences the characteristics of a population in a certain habitat because they make it possible for organisms to have everything they need in the environment to feed, reproduce and survive.
An ecosystem is a system that groups together different populations of animal and plant species which share all the resources available in the same environment. Interactions develop between the elements of an ecosystem, such as energy exchange, food or trophic relationships and all this makes it possible to maintain life in the ecosystem. There are many natural habitats where an ecosystem develops, such as rivers, forests, swamps, deserts, among others. However, there are also artificial habitats created by humans, such as ponds. Ponds have fresh water like lakes, but are smaller (although it is important to consider that ponds can also be formed naturally by water retained or stagnant in a depression in the ground that is usually formed by rain water). Some of the organisms in this ecosystem live in ponds all their lives, while others are transient and visit them only to reproduce and/or feed. Ponds, being habitats where animal and plant species coexist, are susceptible to the influence of environmental factors.
Ecological factors influence the life of any living organism. They can be:
Abiotic: non-living elementsSunlightTemperatureWindHumidityAtmospheric pressurePresence of metals in the soilThe pH of the water2. Biotic: living organisms
Presence of other species that can be preys, competitors, predators or parasites.We have to consider that in a pond we can find microscopic algae that use sunlight and mineral substances in the water, perform photosynthesis and then are eaten by herbivorous animals such as fish, frogs and toads (which can also eat insects as do shrews). These, in turn, are eaten by carnivorous animals, such as herons.
It must be taken into account that for life to take place in a correct and natural way, it is necessary that all the ecological factors are correct. So, the presence and quantity of ecological factors influences how the habitat develops since, for example, with the necessary and sufficient amount of sunlight, plants survive by photosynthesizing and these plants are food for herbivorous animals that in turn will be food for other carnivorous animals. This would then alter the food chain, as the population of the different species would start to decrease because it represents a series of organisms that eat each other in such a way that energy and nutrients flow from one to another.
In addition, the temperature must be adequate for vegetation to grow and for animals to survive. Therefore, it is important that the environmental factors present in the habitat are the right ones and in the right quantity, otherwise the balance of the ecosystem can be lost and thus seriously threaten the survival of the species. In this way, any factor that is altered will affect the ecosystem of the pond.
Learn more about ecosystems here: https://brainly.com/question/21299195
Which of the following statements about proto-oncogenes is false? - Proto-oncogenes are normal genes with the potential to become oncogenes. A mutation must occur in a cell's DNA for a proto-oncogene to become an oncogene. Many proto-oncogenes code for growth factors. If a proto-oncogene's gene product is produced in smaller quantities, a cell may become cancerous.
Answer:
If a proto-oncogene's gene product is produced in smaller quantities, a cell may become cancerous.
Explanation:
The transformation of a cell to a malign cell occurs by mutations accumulation in some specific genes. These genes are grouped into two groups or families:
ProtooncogenesTumor suppressor genesProtooncogenes direct the production of proteins of varying locations and functions that play a significant role in cell proliferation and differentiation. The proteins include cyclins, growth factors, receptors, etcetera. These genes are proteins codifiers and influence the cell cycle by favoring proliferation or inhibiting senescence and apoptosis.
Depending on the organism´s development stage, these genes can be physiologically active or reprimed.
Certain structural or functional changes in protooncogenes contribute to turning them into oncogenes. When protooncogenes mutate into oncogenes, they are capable of controlling cell multiplication and massively synthesize uncontrolled division triggers.
What is not an issue regarding DNA identification?
(A) It is not very reliable
(B) Having databases of millions of DNA profiles can result in more incorrect coincidental matches with partial samples
(C) There is disagreement about whose DNA should be included in the database
(D) Private information related to peoples genetic makeup could get out, which could result in discrimination against them on that basis
Answer:
(A) It is not very reliable
Explanation:
Having a database would cause lots of issues and disagreements
Anthropologist have a keen interests in honey bees .why?
Answer:
But extrapolate to all the bees in a beehive and that singular moment is multiplied tens of thousands of times. ... The honey bee and flowering plants represent one of the most successful examples of mutualism in nature. Our food chain depends very heavily on the role of the bee as it pollinates.
how many known enzymes are there in human body
Answer:
there are about approximately 1300 enzymes found in the Human body
What does the Hardy-Weinberg principle relate to?
Answer:
The Hardy-Weinberg equilibrium is a principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.
Explanation:
Which was most likely an effect on society that resulted from improvement in handling blood during world war l and world war ll?
Answer:
Effective food supply was most likely an effect on society that resulted from improvements in blood handling during World War I and World War II.
Explanation:
The compound 2,4-dinitrophenol (DNP) is a lipid soluble compound that has been used as a weight loss agent. It functions this way by causing the inner mitochondrial membrane to become leaky with respect to protons. Which result might be expected if cells treated with DNP were examined in detail
Answer:
ATP production would be slower in these cells than in untreated cells
Explanation:
Oxidative phosphorylation is the third stage of cellular respiration, which occurs in the mitochondria of animal and plant cells. Oxidative phosphorylation represents the most efficient pathway to generate energy in animal cells by the production of Adenosine triphosphate (ATP) as a consequence of the transfer of electrons from nicotinamide adenine dinucleotide (reduced form) (NADH) or flavin adenine dinucleotide (reduced form) (FADH2) to molecular oxygen (O2) through a sequential series of electron carriers. The 2,4-Dinitrophenol (DNP) poison is an uncoupler of oxidative phosphorylation that carries protons across the mitochondrial membrane, thereby leading to a rapid consumption of energy without the production of ATP. This mitochondrial uncoupler (DNP) has been used as a dieting drug during the 30's decade (1930), but was rapidly banned due to its side effects, which include, among others, tachycardia, hyperthermia, tachypnea, and metabolic acidosis.
Where are protons located?
A. Outside the nucleus of an atom
B. Inside the nucleus of an atom
C. Inside the nucleus of agell
D. In the cell membrane
Answer:
B
Explanation:
both the protons and neutrons are located in the nucleus.
I hope this helps
An atom with 17 protons 17 neutrons and 17 electrons has a net charge of what
Answer:
0
Explanation:
Since we have the same amount of protons and electrons, our net charge is 0.
Hope this helped,
~cloud
Unique feature of osmosis is that
(1) energy is required
(2) it involves movement of solutes
(3) it occurs across membranes only
(4) it is seen only in animals
Answer:
I believe the answer is (3)
Explanation:
"Osmosis is a special type of diffusion, namely the diffusion of water across a semipermeable membrane"
"Osmosis only occurs with a semipermeable membrane"
Khan and sciencedirect
Which characteristics belong to a eukaryote?
is usually multicellular
contains a nucleus
contains one cell type
contains membrane-bound organelles
Answer:
all are correct... it all belongs to eukaryote
Answer:
[tex]{ \sf{ - \: is \: usually \: multicellular}} \\ { \sf{ - \: contains \: a \: nucleus}} \\ { \sf{ - \: contains \: one \: cell \: type}} \\ { \sf{ - \: contains \: membrane-bound \: organelles}}[/tex]
All the above is ✔
What would be the electrostatic force between two charges of equal magnitude if the distance between them is halved
Answer:
the forces between the two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them
Answer:
The force becomes 4 times as much when the distance is halved.
Explanation:
F1 = k*q1 * q2/r^2 = kq^2/r^2
F2 = kq^2/1 / (r/2)^2
Set up a proportion using F1/F2 as you reference.
Notice that you don't know any number that can be used in this equation. However k q^2 does not change as you move the two charges closer together. That being so, you can still show what happens to F1 and F2.
F1/F2 = 1/r^2 // 1/(r^2/4)
Take the denominator, invert the fraction and multiply. That creates another cancellation.
F1/F2 = 1/r^2 * r^2 /4 1
F1/F2 = r^2 // r^2/4 which allows you to cancel r^2
F1/F2 = 1/4 Now you need to interpret F1 and F2. Cross Multiply
4F1 = F2
