Scientists recently discovered that three different types of squid, a marine animal, previously thought to be three different species, were actually all members of one species. Their earlier ideas were based on using squid carcasses (dead bodies). The new, more accepted classification is most probably based on an analysis of
A. a greater number of squid carcasses
B. the feeding habits of the three different species
C. a number of newly found squid fossils
D. the DNA present in the cells of squid

Answer:

Continental shelf

Explanation:

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continental shelf exposed during glacial periods but covered by ocean water during non-glacial periods.

The undersea boundary of a continent is known as a continental shelf. The seven major divisions of land on Earth are called continents. From a continent's shoreline to a point known as the shelf break, a continental shelf runs.

Due to its relative accessibility, the continental shelf is the area of the ocean floor that is most understood. The continental shelf is where the majority of commercial sea resource extraction occurs, including the extraction of hydrocarbons, non-metallic ore, and metallic ore.

Thus, the continental shelf is exposed during glacial periods but covered by ocean water during non-glacial periods.

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Answer:

All cells have a cell membrane, cytoplasm, and DNA. cells differ in how their genetic information is contained. All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.

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Explanation:

Answer:

Survival of the fittest, term made famous in the fifth edition (published in 1869) of On the Origin of Species by British naturalist Charles Darwin, which suggested that organisms best adjusted to their environment are the most successful in surviving and reproducing. Darwin borrowed the term from English sociologist and philosopher Herbert Spencer, who first used it in his 1864 book Principles of Biology. (Spencer came up with the phrase only after reading Darwin’s work.)

Herbert Spencer's Principles of Biology (1864) first introduced the expression “survival of the fittest.”

Darwin did not consider the process of evolution as the survival of the fittest; he regarded it as survival of the fitter, because the “struggle for existence” (a term he took from English economist and demographer Thomas Malthus) is relative and thus not absolute. Instead, the winners with respect to species within ecosystems could become losers with a change of circumstances. For example, fossil evidence supports the notion that the mammoth (Mammuthus) was more fit during the most recent ice age (which ended roughly 11,700 years ago), but it became less fit as humans hunted it and the world’s climate warmed; fossil evidence suggests that the mammoth succumbed to extinction a few thousand years later.

Darwin’s theory of evolution by natural selection entailed three crucial elements: variation, reproduction, and heritability. Variations in the physical features of organisms that tend to benefit an individual (or a species) in the struggle for existence are preserved and passed on (or selected), because the individuals (or species) that have them tend to survive. The success or failure of a given variation is not known when it emerges; it is known only retrospectively, after organisms that possess it either grow and mature and pass it to their own offspring or fail to mature and reproduce.

Importantly, Darwin was influenced by the thinking of English physicist and mathematician Isaac Newton, whose system emphasized experimentation, mathematics, and logic over subjective sense experience. During Darwin’s time, his evolutionary theory was an attempt to construct a similar system for the living world, a frontier not yet crossed in the biological sciences.

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Some philosophers and scientists have suggested that the notion of survival of the fittest is an example of circular reasoning—that is, a tautology (a statement framed in such a way that it cannot be falsified without inconsistency). In tautologies, any true statements that follow are a matter of definition. Indeed, describing those that survive as the fittest is similar to stating that those that survive survive. British philosopher Karl Popper considered “survival of the fittest” self-evident at first; however, he changed his mind after realizing that Darwin posited variation axiomatically; that is, Darwin noted that all individuals did not start with the same set of characters (or traits). Therefore, the forces affecting survival did not weigh on individuals and species equally; there were always variations, some of which would prove favourable and confer fitness over others.

Explanation:

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Answer:

D. The nucleus regulates all cellular activity

Answer: D. The nucleus regulates all cellular activity

The process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).

Meiosis is a cell division process that generates four daughter cells having half of the DNA when compared to the parental cell.

Meiosis needs first the duplication of the genetic material by means of a synthesis stage (S phase).

In conclusion, the process that must happen before meiosis can begin is that DNA doubles and produces sister chromatids (Option C).

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The process that leads to the formation of structure X in the diagram would be meiosis.

The diagram is that of the female's reproductive structure showing the uterus, ovary, and fallopian tubes.

The ovary is diploid (2n), but gives rise to haploid (n) eggs by meiotic division. Thus, meiosis is referred to as reductional division.

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Explanation:

when glucose concentration is high the pancreas secretes more insulin while if the glucose level falls the pancreas secretes glucagon to raise them

Answer:

d

Explanation:

Answer:

C. to regions with low pressure

Explanation:

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1. The energy lost to disorder - [tex]\boxed{ entropy }[/tex]

2. Related to or possessing motion - [tex]\boxed{ kinetic }[/tex]

3. All of the chemical reactions in an organism required for maintenance of the processes of life - [tex]\boxed{ metabolism }[/tex]

4. Possible; ability to go into action or perform work - [tex]\boxed{ potential }[/tex]

5. The study of energy and its transformations - [tex]\boxed{ thermodynamics }[/tex]

[tex]\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}[/tex]

Answer:

"scattering" that would be the correct answer :)

Explanation:

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Answer:

B

Explanation:

Answer:

B. nucleic acid

Explanation:

DNA is a type of Nucleic acid.

Answer:

the plasma is go out from the capillaries, therefore the capillary is incomplete because in the capillaries the plasma is recused, So the plasma is create illustration

Answer:This pattren makes sense for what we see evryday is beacause each skin color come from somewhere like the skin color white it moslty comes from english speaking countries.

Explanation:Hope it helped

Answer: The answer is c

Answer:

c. Mitochondria have their own DNA

Explanation:

Answer:

B. extremophiles

Explanation:

Archaea are often called extremophiles because they live in areas where most living things couldn't survive.

Answer:

B. extremophiles

Explanation:

Archaea are called as extremophiles. So, option (B) is correct. Hope it helps you!!!

Answer:

4.Diffusion

Explanation:

Diffusion if the movement of particles from a region of high concentration (where there is many) to a region of low concentration (where there is less) until it is evenly distributed.

Answer:

this is not a correct Q

this is wrong

Answer:

The sun, the star Proxima Centauri, and the star Polaris.

Explanation:

The sun and stars emit light on their own, therefore they are luminous.

Answer:

A. A change in the gene pool over time

Explanation:

The evolution is the change in the gene pool over time. Therefore, the option (A) is the correct answer.

Answer:

Different types of cells have different jobs that are necessary to keep organisms alive. And cells also give the living animal more support. They also hold the genetic information of that organism in their nucules. This is with most cells but bacteria cells do not contain nucules.

Small shrubs are the kind of organisms that start secondary succession after a forest fire. The correct option is A.

Thus, the term "secondary succession" describes the ecological recovery process that follows a disruption like a fire. Small shrubs have developed survival strategies that enable them to swiftly colonize damaged environments.

They have the capacity to emerge from subterranean structures once again or to create seeds that will take root in newly accessible sunshine and nutrients. Due to their quick growth and capacity to keep the soil stable, these shrubs facilitate the establishment and flourishing of other plant species.

Thus, the ideal selection is option A.

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Answer:

the surface of the earth absorbs. 51 percent of the insolation

Answer:

Explanation: