Answer:
The most significant experiment performed to date on the formation of organic molecules remains that of Miller and Urey in 1952 when they sought to test the hypothesis of Oparin and Haldane that the organic building blocks of life emerged from a reducing atmosphere (Miller, 1953). Miller filled a flask with the four gaseous elements of the reductive atmosphere: methane, ammonia, hydrogen and water. He then passed electrical discharges through them to simulate lightning. After 125 h of the experiment, using the equipment available to him at the time, Miller identified several alpha amino acids contained within the residues.
I can bench 315, I got money, im 8% bodyfat and I dress pretty good and I'm 6 ft 1. why do I still get no girls????? also I got money.
maybe cause you asking this on brainly
PLZZ HELPPPPP ASAPPP!!!
!!!!30 points !!!!
Using two heterozygous tall pea plants, so Tt is the genotype.
T t <---- alleles from parent one
T TT Tt
t Tt tt
^alleles from parent two on the left
Results: TT, Tt, Tt, and tt
Genotype ratio: 1/4 TT, 1/2 Tt, 1/4 tt
Phenotype ratio: T is dominant over t, so 3/4 tall and 1/4 short pea plants
Vegetative reproduction is a type of asexual reproduction
in which nonreproductive parts of an organism can break
off and develop into new individuals.
Which event is an example of vegetative reproduction in plants?
A. Pine trees produce seeds in cones.
B. Mosses form spores in capsules.
C. Sunflower plants produce seeds in their flowers.
D. Kalanchoe plants produce plantlets on their leaves.
Answer:
wait what was it
Explanation:
I know it isn't A. or B.
Answer:
The answer is D.
Explanation:
All the other options are sexual reproduction, not asexual.
PLSS HELP!!
explain in detail different types of receptors
Answer:
Chemoreceptors detect the presence of chemicals. Thermoreceptors detect changes in temperature. Mechanoreceptors detect mechanical forces. Photoreceptors detect light during vision.
I hope it's helpful!
Tumor of the parathyroid gland often result in secretion of excess parathyroid hormone. Considering the function of this hormone, predict the effects of such a tumor.
Answer:
heloooooooooooooooooooooooooooooooooooooooooooooooooo
A break in Earth’s lithosphere?
Answer:
A fault is a fracture, or break, in Earth's lithosphere, along which blocks of rock move past each other.
I hope it's helpful!
3. Describe What are two functions of the fluids in semen?
Answer:
motility, transportation, capacitation, and fertilising ability. Once in contact with females, seminal fluid may stimulate ovulation, modulate immune activity, provide nutrition, alter reproductive-tract pH, and form mating plugs.
Explanation: Brainlest plz?
Answer:
Here the answer
Explanation:
mark me as brainliest pla
help please asap
Directional selection differs from stabilizing selection in that:
a.Directional selection favors one extreme phenotype, whereas stabilizing selection favors intermediate over extreme phenotypes
b.Directional selection requires new mutations whereas stabilizing selection uses existing variation
c. Directional selection operates only in small populations, whereas stabilizing selection only works in large populations
d. they both do nothing, these are terms I made up while writing this retake
Answer:
a. Directional selection favors one end of the phenotype distribution, whereas
stabilizing selection favors intermediate over extreme phenotypes
Explanation:
Directional selection is called directional because it favors one phenotype over another, and stabilizing selection finds a balance between phenotypes.
Directional selection differs from stabilized selection in that it prioritizes one end of the phenotypic distribution, but stabilized selection prioritizes the middle over extreme phenotypes.
What is phenotype selection stabilization?The stabilized choice is the opposite of a destructive choice. Prefer intermediate varieties rather than individuals with extreme phenotypes. Stabilization of choice tends to remove more serious phenotypes and results in reproductive success of standard or average phenotypes.
What is an example of a stabilization choice?Stabilization of selection If the evolutionary pressure selects for two extremes of the trait, the population experiences stabilization of selection. For example, plant height can be affected by stabilizing choices. Plants that are too small may not be able to compete with other plants for sunlight.
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Day three code word
Answer:
Explanation: lol
how your innate immunity protects you from the pathogens you encounter.
Answer:
General defenses are the first line of defense and are collectively called: the Innate Immune System. This system is called "innate" because it is genetically encoded, the traits that protect us from infections can efficiently be transmitted to our offspring.The innate immune system recognizes molecular structures that are produced by pathogenic microorganisms. Microbial substances that stimulate innate immunity are often shared by different classes of microbes and are called molecular patterns associated with pathogenic microorganisms
Explanation:
The first defenses that external agents face when trying to penetrate the body are totally nonspecific and are made up of the anatomical, physical, chemical or biological barriers characteristic of each location, while some, such as temperature, are systemic. Between all they make up innate immunity. The importance of these barriers is reflected in the ease with which infections are acquired when one of them fails. Innate cell recognition systems are based on surface or intracellular proteins of epithelial cells, neutrophils, macrophages, and dendritic cells and on soluble cytoplasmic receptors. All these receptors are generally called PRRs (Pattern Recognition Receptors) and bind to PAMPs (Pathogen-associated Molecular Patterns) molecules expressed only by the pathogen (bacterial lipopolysaccharides, carbohydrates and lipoproteins, peptidoglycans, RNA, DNA, etc.). Innate immunity constitutes a less evolved and specific defense than the adaptive one, since the same mechanism (cells, soluble factors, etc.) acts against different agents. Furthermore, repeated exposures to a foreign molecule or agent elicit a similar response and with the same intensity in all of them; that is, it lacks immune memory. The fact that it is a less evolved and specific response is compensated by its speed, since it occurs in hours, and because its intensity is not linked to a previous contact with the foreign agent. Furthermore, its action is essential for the subsequent development of the adaptive immune defense, to which the agent must be exposed once these barriers have been overcome.
The gene for a long neck also gives stronger, faster muscles, which gives tortoises with this trait
an advantage in catching insects. How would this advantage affect the population of tortoises from
Generation 1? How may that affect subsequent generations?
Answer:
it would help them thrive
Explanation:
because it anables them to catch more with there stronger faster necks
The shift in the traits of tortoises in the population states how natural selection drove the evolution of the tortoises.
Why do tortoises shift in their traits?During the evolution, with an extended period of time, the shorter vegetation became less available and tortoises with short necks had the disadvantage to survive in that area.
Tortoise develops genes for a long neck and having stronger, faster muscles, which gives tortoises with this trait an advantage in catching insects.
This natural selection helps the tortoises, to survive by catching more food in a particular area, it states tortoises with long necks are the only tortoises living during evolution.
Therefore, this advantage increases the survival rate of the tortoise population.
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Blood pressure is different in different parts of the body.
A.
true
true
B.
false
false
Answer:
A true
Explanation:
because blood pressure is a major nerve cell like when someone says oh my blood pressure is high leave me alone
Which of these choices is a benefit of the Endangered Species Act?
A. Can restore balance to ecosystems
B. Can cost a lot of money to enforce
C. Can interfere with economic progress
D. Can prohibit removal of dangerous animals
Answer:
A
Explanation:
A benefit of the Endangered Species Act is to restore balance to ecosystems.
What is Endangered Species Act?The Endangered Species Act refers to the law implemented for the protection of biodiversity by a country. Its purpose is to prevent the extinction of at-risk plants and animals and to increase their population.
So we can conclude that a benefit of the Endangered Species Act is to restore balance to ecosystems.
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Most of the ocean floor is a type of rock called basalt. At the edge of continents, this basalt erodes and becomes small particles. Over time, the particles are compressed and form what type of rock? A. Igneous B. Basinic C. Metamorphic D. Sedimentary
Answer: D. Sedimentary
Explanation:
Sedimentary rocks are formed overtime are different particles of sand, shells, pebbles and other fragments of materials form layers and harden into rock.
The particles are compressed and form sedimentary rocks in the ocean floor. Ocean floor is the bottom of the waterbody. Thus, the correct option is D.
What is Ocean Floor?The seabed or ocean floor is the bottom of the ocean. All the floors of the ocean are known as 'seabed'. The structure of the ocean floor of the global ocean is governed by the plate tectonics.
Most of the parts of the ocean are deep, whereas the ocean floor is known as the abyssal plain. The seabed also known as the seafloor, ocean floor, and ocean bottom is the bottom of the ocean.
The ocean floor can be divided into three distinct regions which are the continental margins, abyssal plains, and the mid-ocean ridges. The ocean floor has rocks which are called basalt. Here, the basalt particles are compressed which forms the sedimentary rocks. Sedimentary rocks are formed by accumulation of minerals.
Therefore, the correct option is D.
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Why do animals become adapted to their environments?
Answer:
An adaptation is a way an animal's body helps it survive, or live, in its environment. Camels have learned to adapt (or change) so that they can survive. Animals depend on their physical features to help them obtain food, keep safe, build homes, withstand weather, and attract mates.
Explanation:
:)
Answer:
All organisms need to adapt to their habitat to be able to survive. This means adapting to be able to survive the climatic conditions of the ecosystem, predators, and other species that compete for the same food and space. ... An animal may adapt to its habitat in different ways.
Explanation:
30 extinct species name
Answer:
Dodo.
Great Auk.
Stellers Sea Cow.
Tasmanian Tiger.
Passenger Pigeon.
Pyrenean Ibex.
Baiji White Dolphin.
West African Black Rhinoceros.
Woolly Mammoth
Sabre-toothed Cat
Desert rat-kangaroo
Tasmanian tiger, or Tasmanian wolf
Toolache wallaby
Desert bandicoot
White-footed rabbit-rat
Bulldog rat
Aurochs
Red gazelle
Schomburgk's deer
Falkland Islands wolf,
Sea mink
Japanese sea lion
Caribbean monk seal
Giant fossa
Madagascan dwarf hippopotamus,
Bluebuck
Jamaican monkey
Will it be enough????
What makes up the central nervous system?
Answer:
The Central Nervous system is made out of spinal cords that connect to the brain.
Explanation:
Brain and spinal cord
Which of the following is not used during photosynthesis
Water
Solar energy
Oxygen
Carbon dioxide
Answer:
I think it's oxygen. Sorry if i'm wrong!
Answer:
I believe the answer is oxygen
Explanation:
because oxygen is produced and used
In one species of bird, there are three varieties of feather color. What is this an example of?
ecosystem diversity
species diversity
genetic diversity
color diversity
Answer:
The answer is C, genetic diversity.
Explanation:
The three varieties of feather color is an example of genetic diversity.
WHAT IS GENETIC DIVERSITY?Genetic diversity is the variation that occurs within the genetic material of organisms.
The genes are responsible for the phenotypic expression of traits.
Three varieties of feather color in a poultry animal is an example of diversity in the genetic content.
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why are summer days longer than winter days on earth ?
Answer:
3. The region of Earth => away from the sun.
Explanation:
In the summer months, the northern half of the Earth, where we live, tilts towards the Sun. The seasons are caused as the Earth, tilted on its axis, travels in a loop around the Sun each year. Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun. This means we get more sunlight, making the days longer.
what is the definition respration
Answer:
the action of breathing.
Explanation:
Lipids are
A. polar molecules.
B. protein molecules.
C. similar to water molecules.
D. nonpolar molecules
Answer:
nonpolar molecules
Explanation:
Red flowers (allele CR) are incompletely dominant over white flowers (allele CW), resulting in three possible phenotypes: red, pink, and white flowers. Both parents express pink flowers.
a. What is the genotype of the parents? ______ and _____
b. What is the gametes coming from both the parents? _____
c. What is the probability of having pink flower in the offspring? _______
d. What is the probability of having white flower in the offspring? _____
Answer:
answer below
Explanation:
a. What is the genotype of the parents? dna and genes
b. What is the gametes coming from both the parents? Child seeds
c. What is the probability of having pink flower in the offspring? High/30%
d. What is the probability of having white flower in the offspring? low/93%
A food development company is interested in making on-the-go powder-based snacks in which consumers can "just add water" before eating. During market tests there are complaints that the powder does not dissolve well in water.If you were a food scientist, how might you modify the formula so that it will more easily dissolve in water? Provide your answer in 1-2 complete sentences.
The correct answer to this open question is the following.
Although there are no options attached we can comment on the following.
I might modify the formula so that it will more easily dissolve in water in the following way. I would ask my scientist in the laboratory to modify the formula. To make the formula more soluble when it makes contact with water, the addition of polar hydrophilic side groups to the molecule will help the formula to be soluble.
That is why it is very important to do focus groups to taste the product before launching it commercially and send the product to the stands of supermarkets, pharmacies, or grocery stores. If it is not previously tasted, you could encounter many difficulties. Furthermore, the FDA requires the best quality of the product so you have to make sure it works as it says in your advertisement.
Describe the environmental conditions that extremophiles are able to live in. Describe the environmental conditions that extremophiles are able to live in. Extremophiles were microbes that could only live in conditions that prevailed early in Earth's history when environments had high temperatures and pressure and lacked oxygen. Extremophiles includes those microbes that thrive in very high-salt, high-temperatures, low-temperature, high-pressure, low-pH, or high-pH harsh conditions. Extremophiles can only survive in habitats where there are extreme changes in close proximity, such as hydrothermal vents at the bottom of the ocean, where water as hot as 300°C emerges and mixes with 4°C seawater. Extremophiles are able to tolerate extreme conditions found in space such as a near vacuum and temperatures in excess of 300°C or several hundred degrees below 0°C.
Answer:
Extremophiles includes those microbes that thrive in very high-salt, high-temperatures, low-temperature, high-pressure, low-pH, or high-pH harsh conditions.
Explanation:
Extremophilic organisms are life forms that can grow in extreme environmental conditions, such as the above mentioned. In general, extremophiles are prokaryotic organisms (i.e., archaea and bacteria), although there are some eukaryotic species that are considered extremophilic organisms. Extremophiles are classified into two main types: 1-microorganisms that live in extreme conditions and 2-microorganisms that have the ability to tolerate extreme environmental conditions. Extremophiles are extremely important both in basic and applied research. An example of this is the thermostable Taq DNA polymerase obtained from the bacterium Thermus aquaticus (an extremophile that lives in areas of high temperature and pressure), which is essential to carry out the Polymerase Chain Reaction (PCR).
Corn kernels can be high in starch (starchy) or high in sugar (sweet). The allele for starchy kernels (H) is dominant to the allele for sweet kernels (h). Each kernel on an ear of corn represents an individual offspring. A particular ear of corn has 92 starchy kernels and 88 sweet kernels. What are the MOST likely genotypes of the parent corn plants that produced this particular ear of corn?
Answer:
Hh, Hh
Explanation:
The allele is the two or more variants of a specific trait present on the genes of the organism that is responsible for giving a particular physical and genetic attribute. The allele can be dominant or recessive.
The most likely genotype of the parent is Hh and hh.
How to know the genotype of the parent plant?The genotype of the parent plant can be estimated by crossing the heterozygous F1 generation with the recessive purebred parent plant. This type of cross is called a test cross.In the question, the offspring with the starchy and the sweet kernels is approximately in a 1:1 ratio. The offspring can be heterozygous dominant for the starchy kernel and purebred recessive for the sweet kernel.The heterozygous dominant offspring is crossed with the recessive purebred parent plant and will give the genotype.Thus, the genotypes are Hh and hh.
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The function of pure lines: ?
Answer:
The definition of a pure line is a result of inbreeding where animals or plants have certain characteristics that are the same through generations. An example of a pure line is the result of inbreeding of a certain flower to help it fight off diseases.
1. Which best describes an organ system?
A. It is made up of similar cells.
B. It is made up of similar tissues.
C. It is made up of different organs
D. It is made up of different organism.
2. Which of the following is composed of tissues that come together to perform a specific function?
A. Cell
B. Organ
C. Organ system
D. Organism
3. Which of the following is a group of similar cells that perform a particular function?
A. Organ
B. Organ system
C. Tissue
D. Organism
4. What is the simplest level of organization in a organism?
A. Organ
B. Organ system
C. Tissue
D. Cell
5. An organ system is a group of organs which _____.
A. Are made of similar cells
B. Are made of similar tissues
C. Is a specific part of the body
D. Work together to perform interrelated function
4. What are two ways that celestial navigation/astronavigation and navigation by GPS differ?
Do they have anything in common?
Differences: Celestial navigation is completely based on the position of sun in the sky. Here, the use of angular measurements can exist among the celestial objects. It is less accurate than the GPS.
The ways that celestial navigation/astronavigation and navigation by GPS differ include:
Celestial navigation is less accurate than GPS.Celestial navigation is an ancient method of navigation while GPS is a newer method of navigation.Celestial navigation is the navigation by the sun, moon, stars, and planets. GPS which refers to the global positioning system refers to the navigation system that's space-based that is important for broadcasting accurate navigation pulses to the users.The global positioning system is also known to be the network of satellites that are used in determining the location of a particular thing.The similarity between them is that they are both ways of locating a particular thing since they're used for navigation.Read related link on:
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what is a magnetic energy??
Answer:
The energy which is stored in the magnet is called magnetic energy.
magnetic energy is a energy moving for electrons