what is the reason why luca can't be a chemoheteterotoph?

One of the earliest adaptations made by hominids was bipedalism, and there are several theories as to how the human ancestors acquired it. One of them claims that after a group of our ancestors started living in Savannah habitats, bipedalism emerged (open areas covered with grasses). The Savannah lineages didn't have many trees to climb, so the upright posture let them see predators in the distance. Other lineages remained in the forests, where they could use the treetops and branches for protection and to collect food.

The second theory links the use of tools to the evolution of human bipedalism. The two forelimbs are free to explore the environment, aid in the use of tools, and even gather food while moving because a species does not move on all four limbs.

With this knowledge, we can conclude that bipedalism gave the human race a free arm to build technology and allowed them to move more slowly while walking, among other benefits.

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Explanation:

a living system is a system in an organism consisting of organs. each organs carry out different functions to ense life processes can be carried out effectively. The function of the organs are determined by the cells which make up the tissues. The connections are important to remove wastes/toxins out of the body and help absorb nutrienys, in some cases produce hormones as a form of homeostasis to ensure the body remains in a healthy optimised state constantly.

The conclusion from the data is that the salinity increases as you get deeper into the ocean.

Salinity means the level of salt in water. The salinity of water tends to increase as the depth of water increases. This means that the water becomes saltier as it gets deeper. Similarly, the temperature decreases with increasing depth.

Hence, the conclusion from the data is that the salinity increases as you get deeper into the ocean.

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Answer:

An allele frequency changes in a population

Explanation:

Because alleles are alternative forms of a gene that arise from mutation.

Answer:

The idea model is used to for relationships between variables, such as time and distance, that can be graphed or be placed into an equation. A physical model, on the other hand, is generally used for objects, such as a cell, to show the various parts and their orientation in respect to each other. A computer model is used to track weather patterns and other factors to predict natural events.

Explanation:

Answer:

The idea model is used to for relationships between variables, such as time and distance, that can be graphed or be placed into an equation. A physical model, on the other hand, is generally used for objects, such as a cell, to show the various parts and their orientation in respect to each other. A computer model is used to track weather patterns and other factors to predict natural events.

Explanation:

THE PERSON ABOVE IS CORRECT

Answer:

This question lacks options, options are: A) DNA replication is semiconservative. B) DNA replication is conservative. C) RNA synthesis is conservative. D) DNA replication is not conservative. The correct answer is A.

Explanation:

Watson and Crick proposed the semi-conservative hypothesis (later demonstrated by Meselson and Stahl in 1957), according to which new DNA molecules formed from an old one have an old and a new strand. This replication model assumed that the double helix DNA separates its two strands and each one serves as a template to synthesize a new strand following the complementary rules of nitrogenous bases. This model was called Semiconservative, since the two newly synthesized double helices have an old strand (an old half) and a new strand (a new half).

The process of the formation of new DNA from the older DNA is called replication.

The answer to the following question is semi conversation of DNA.

In the replication, there are two-strand in which one stand is template strand and the other stand is called leading strand. Both the strands act as a template strand and is being copied by the DNA polymerase.

These template strands formed the new DNA and joined it by the DNA ligase to complete it.

Hence, In DNA replication, the resulting daughter molecules contain one strand of the original parental DNA and one new strand. This phenomenon is known as semi-conservation.

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Answer:

Phosphate heads are hydrophilic and the fatty acid tails are hydrophobic

Answer:

I think it's a Power slam-

Explanation:

Sorry if it's wrong

Plants help humans in many ways. The food that we eat, the home that serves as our shelter, the medicine that cure our illnesses, as well as the fuel that is used by our automobiles are all from plants.

From the options provided, the following are ways where plants help humans.

1. Plants act as a carbon sink. They are the one responsible for the absorption of CO2 from the atmosphere in the process of photosynthesis.

2. Plants aid in the absorption of water in the soil to prevent flooding and erosion.

3. Bioremediation is a technology that uses plants in order for humans not to fell the harmful effect of environmental hazards. This process is a way for the cleaning of water resources as well as improvement of the quality of air.

Abscission is the separation of a the part of the plant to its organ.

Answer:

Uncontrolled cell division is often, but not always, a characteristic of cancer.

Explanation:

Answer:

Uncontrolled cell division is a characteristic of tumors/cancer.

Answer:

Median Nerve

Explanation:

In Carpal Tunnel Syndrome the Median Nerve is compressed. This can cause tingling sensations in the fingers. This is caused by pressure on the nerve.

The chromosomal theory of inheritance is directly related to Mendel's findings as it provides a physical basis for the inheritance patterns observed by Mendel in his experiments with pea plants.

Mendel's findings established the fundamental principles of inheritance, such as dominance, segregation, and independent assortment. The chromosomal theory of inheritance, proposed by Walter Sutton and Theodor Boveri, linked these principles to the behavior of chromosomes during meiosis. It suggests that genes are located on chromosomes and are responsible for the traits Mendel observed. The chromosomal theory of inheritance essentially connects the concepts of genetics and cytology.

By observing chromosome behavior during meiosis, Sutton and Boveri discovered that chromosomes segregate and assort independently, similar to Mendel's principles. This established a direct relationship between Mendel's findings and the chromosomal theory of inheritance. In this context, Mendel's "factors" or units of heredity can be considered genes that are located on chromosomes. The chromosomal theory of inheritance further validates and expands upon Mendel's principles by providing a physical basis for how these genetic factors are inherited and expressed.

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The brain is an organ composed of a significant amount of nerve tissue that is shielded by the skull. It affects almost all of the major body systems.

Lobes of the brain:

The frontal lobe is in charge of planning, decision-making, memory, emotion, and movement.

The parietal lobe is responsible for controlling mathematical and spatial reasoning as well as sensations including touch, pressure, temperature, and pain.

The temporal lobe is involved in memory, language, and hearing.

The occipital lobe is in charge of vision and the interpretation of visual data.

The information about the body's internal state, such as hunger, thirst, and pain, is processed by the insula lobe.

What is the function of the brain?

Processing sensory data, controlling blood pressure and respiration, and releasing hormones are some of the brain's primary functions.

The greatest portion of the brain is called the cerebrum. It has two halves, known as hemispheres. The cerebellum is situated directly below the occipital lobes in the back of the brain. Fine motor abilities, or the coordination of smaller, or finer, motions, particularly those involving the hands and feet, are involved. For messages entering the brain, the thalamus functions as a form of relay station. Additionally, it affects alertness, pain perception, and attentiveness.

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false the codon of trna is not complementary to the anticodon of mrna

Transfer RNA, often known as tRNA, is a tiny RNA molecule that is essential for the production of proteins. Between the messenger RNA (mRNA) molecule and the expanding chain of amino acids that make up a protein, transfer RNA acts as a link (or adapter).

An anticodon is a trinucleotide sequence that is complementary to a matching codon in a messenger RNA (mRNA) sequence and is found at one end of a transfer RNA (tRNA) molecule.

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Answer:

range

Explanation:

The geographic area where a given population is found is referred to as its distribution range. The geographic or physical boundaries that make up a given population of organisms are represented by the distribution range.

On the other hand, carrying capacity refers to the most members of a species that a particular habitat or ecosystem can support over the long term. It is the maximum population that may exist indefinitely without seriously affecting the environment or exhausting its resources.

A measure of how packed or concentrated a population is in a given area is called population density. The usual unit of measurement is the number of people per unit of habitat or land area. Within a distribution range, population densities can change between areas, indicating how individuals are dispersed within the available environment.

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Answer:

growth!

Explanation:

when the duck grows, it'll gain stronger muscles which leads to stronger endurance

The molecule that crosses the luminal membrane of intestinal cells by facilitated diffusion is glucose. This is because glucose is a monosaccharide and is able to be transported across the membrane with the help of transport proteins. Lactose and fructose are disaccharides that require further digestion before they can be absorbed.

The molecule that crosses the luminal membrane of intestinal cells by facilitated diffusion is: C. Fructose.


1. Among the given options (A. glucose, B. lactose, C. fructose), we need to identify the molecule that uses facilitated diffusion to cross the luminal membrane of intestinal cells.
2. Glucose (option A) is primarily absorbed through the luminal membrane via a secondary active transport process, called the sodium-glucose linked transporter (SGLT).
3. Lactose (option B) is first hydrolyzed into glucose and galactose by the enzyme lactase, and then glucose and galactose are absorbed through secondary active transport and facilitated diffusion, respectively.
4. Fructose (option C) is absorbed through facilitated diffusion using a specific transporter called GLUT5.

So, the correct answer is C. Fructose, which crosses the luminal membrane of intestinal cells by facilitated diffusion.

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Answer: The shape (structure) of a protein determines its function. For example, there are two basic shapes for proteins: fibrous and globular (round). Fibrous proteins, such as collagen (Figure 18.1), are shaped like a rope and give strength to our skin to prevent it from tearing.

Explanation:

Answer:

Density-dependent factors include disease, competition, and predation. Density-dependant factors can have either a positive or a negative correlation to population size. With a positive relationship, these limiting factors increase with the size of the population and limit growth as population size increases.

Explanation:

Answer:

They are all organelles in a cell

Explanation:

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The sporophyte of the mosses and liverworts is never an independent plant, which can be explained by the fact that these organisms exhibit a unique form of alternation of generations, known as the gametophyte-dominant life cycle.

In this life cycle, the gametophyte generation is the dominant and persistent phase, while the sporophyte generation is relatively short-lived and dependent on the gametophyte for nutrition and support.

During the alternation of generations, the gametophyte produces gametes (sex cells) through mitosis, and these gametes fuse during fertilization to form a zygote. The zygote then develops into the sporophyte, which remains attached to and dependent on the gametophyte for nutrients. The sporophyte produces spores through meiosis, which are dispersed to new environments where they can germinate and develop into new gametophytes.

In the case of mosses and liverworts, the sporophyte generation lacks the specialized structures and adaptations necessary for independent growth and survival. Instead, it relies on the gametophyte's ability to photosynthesize and provide nutrients. This arrangement ensures the continued development and dispersal of the species while maintaining the dominance of the gametophyte generation.

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Given a bacteria culture starts with 2000 bacteria. a) It take 2.93 hours for the number of bacteria to double ; b) It will take  4.21 hours. for the bacteria population to grow to 90000.

a) After 6 hours the estimated count is 60 000. Round your answer to 2 decimal places of an hour. For calculating the time taken for a number of bacteria to double, we use the formula, t = (ln 2)/k where, t = time, k = doubling time (in hours), and ln = natural logarithm. Given that the initial number of bacteria is 2000 and the number of bacteria after 6 hours is 60 000. The estimated growth rate, k = (ln N₁  - ln N₀ )/(t₁  - t₀ ) where N₁ is the final number of bacteria, N₀ is the initial number of bacteria, t₁ is the final time, and t₀  is the initial time. So, we have k = (ln 60 000 - ln 2000)/(6 - 0) = 1.418 / 6 hours = 0.236. Therefore, t = (ln 2)/k = (ln 2)/0.236 = 2.93 hours (approximately) to double the number of bacteria. Hence, the answer is 2.93 hours.

b) Assume the doubling period was half an hour.  Round your answer to 2 decimal places of an hour. Given that the doubling period was half an hour. Therefore, the growth rate, k = 1/doubling time = 1/0.5 = 2 per hour. Let t be the number of hours to grow to 90,000 bacteria. Then, we have 90,000/2000 = 2^(t/0.5) => 45 = 2^(t/0.5) => ln 45 = (t/0.5) ln 2 => t = (ln 45)/(0.5 ln 2) = 4.21 hours (approximately). Therefore, the answer is 4.21 hours.

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At low light levels, green leaves are most efficient at photosynthesis. But well yeah, in sunny days, red light will work the same as green light

The paragraph describes monthly measurements of environmental factors and nutrients in two sampling sites, including seawater temperatures, salinity levels, pH, and nutrient concentrations.

The paragraph provides a summary of the monthly measurements of various environmental factors and nutrients in two sampling sites. The seawater temperatures ranged between 18 and 36 °C, with the lowest temperature observed in early January and the highest temperatures recorded at the end of August. Minor variations in temperature between the two sites were likely due to the timing of sampling.

Seawater salinity levels ranged between 43 and 46 psu, reflecting the high salinity typically found in the Arabian Gulf. The lagoon showed slightly higher salinity levels than the marina, despite receiving low-salinity water from mariculture facilities.

pH levels ranged from 7.3 to 7.9, with slightly higher averages in the marina compared to the mariculture centre.

The mariculture centre had higher levels of dissolved nutrients, including ammonia and phosphate, compared to the marina. Concentrations of ammonia, phosphate, nitrate, and nitrite were all higher in the mariculture centre.

Principal Component Analysis (PCA) revealed a strong correlation between nutrients (ammonia, nitrate, nitrite, and phosphate) and salinity with the mariculture centre.

Overall, the paragraph presents an overview of the monthly environmental measurements, highlighting variations in seawater temperature, salinity, pH, and nutrient concentrations between the two sampling sites.

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Cnidarians, including hydra, are classified based on their developmental features such as germ layers and symmetry. Cnidarians have two germ layers, the endoderm and ectoderm, which form during early embryonic development. They also exhibit radial symmetry, meaning their body parts are arranged in a circular pattern around a central axis. These characteristics are unique to cnidarians and allow them to perform specialized functions such as capturing prey with their tentacles and stinging cells.

Planarians, on the other hand, are classified as flatworms and exhibit bilateral symmetry. They have three germ layers, the endoderm, mesoderm, and ectoderm, which form during embryonic development. This allows them to have a more complex body structure and perform specialized functions such as regeneration.

Overall, the developmental features used to categorize the phylogenetic position of cnidarians such as hydra, including germ layers and symmetry, differ from those of planarians. These differences are important in understanding the evolutionary relationships and adaptations of these organisms.

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Answer:

The answer is ALLELES.

Explanation:

Different forms of a gene that occur at the same locus is ALLELES.

A single common ancestor evolving into the current 28 species of silversword plants found among the Hawaiian islands is an example of adaptive radiation.

In this process, a single ancestral species diversify into multiple new species, each adapting to different environments and filling various ecological niches within their habitats.

Adaptive radiation occurs when a single ancestral species evolves into various forms adapted to specific environmental niches. In the case of the silversword plants in Hawaii, the common ancestor evolved into 28 species with unique adaptations to the different environmental conditions found on the various islands.

This is an example of how evolution can result in species diversification, leading to the development of new species with specialized characteristics that allow them to survive in specific environments.

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Answer:

Kidneys

Explanation:

The reason for this is because we digest and it goes through our kidneys

Answer:

Honey bees are social insects because they live together in large, well-organized family groups. A single honeybee cannot grow or survive by itself. The three distinct kinds of honeybees in a colony are queen, worker, and drone.

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