Why natural selection is not just a theory?

EcoR1 creates 4 nucleotide sticky ends with 5' end overhangs of AATT.

These are the two options (i) and (iii) and the red marks indicate how the segment would be cut. So, the correct answer is option (iii)

Please give me brainliest

Answer

B. when there is no evolution

Explanation

Recessive allele: Ebony and stubble bristles.

We take it as

ssee- the small letter will show that it is recessive.

Biology > Ecology > Air pollution

Burning fossil fuels such as gasoline or oil generates numerous pollutants, such as ashes, sulfur and carbon dioxides, which contaminate the environment, affect air quality and contribute to global warming.

One of the compounds not generated during this process is copper sulfates. Therefore, the answer is A.

Water is needed for all life forms, including microorganisms, removing the water from food to preserve it means the microorganisms cannot perform the chemical reactions needed to consume the food, so the food is preserved for a longer time (option B is the right answer).

The blue trait is most likely caused by a dominant allele (e.g. allele A), while the white trait is caused by a recessive allele (allele a). However, for the diagram to be correct, individuals 1I and 2I must have genotypes Aa (blue) and aa (white) respectively, thus making the punnet squares, the genotypes of their offspring would be Aa (blue) and aa (white). In turn, we can verify that this is correct by observing the third generation since if the blue individuals of the second generation had genotype AA, they could not have white offspring (aa). If we make all the crosses, the genotypes would be as follows:

1 I: Aa 2 I: aa

1 II: Aa 2 II: aa 3 II: aa 4 II: aa 5 II: Aa 6 II: aa 7 II: Aa 8 II: Aa

1 III: Aa 2 III: aa 3 III: aa 4 III: aa 5 III: aa 6 III: Aa or AA 7 III: aa 8 III: Aa or AA 9 III: aa

General category: Biology.

Sub-category: Ecology

Topic: Population growth

Introduction:

The Biotic potential is described by the unrestricted growth of populations. This event causes the maximum growth of that population.

By definition, when a population reaches the biotic potential, then the species has its highest birthrate or a high number of births or accelerated population growth and lowest mortality rate.

we can conclude that the correct answer is:

D. Biotic Potential

Explanation:

Step 1: Initiation

Initiation is the beginning of transcription. It occurs when the enzyme RNA polymerase binds to a region of a gene called the promoter. This signals the DNA to unwind so the enzyme can ‘‘read’’ the bases in one of the DNA strands. The enzyme is now ready to make a strand of mRNA with a complementary sequence of bases.

Step 2: Elongation

Elongation is the addition of nucleotides to the mRNA strand. RNA polymerase reads the unwound DNA strand and builds the mRNA molecule, using complementary base pairs. During this process, an adenine (A) in the DNA binds to an uracil (U) in the RNA.

Step 3: Termination

Termination is the ending of transcription, and occurs when RNA polymerase crosses a stop (termination) sequence in the gene. The mRNA strand is complete, and it detaches from DNA.

The all three process of cellular respiration produces 18 times more ATP than glycolysis alone.

As there are 4 ATP produced in glycolysis from one molecule of glucose,2 from Krebs cycle, and rest 34 from electron transport chain.

These three process made total of 38 ATP

The hemophilia gene is an X-linked recessive gene. This means that a person will be hemophiliac if has two copies of the recessive "h" allele (in the case of females) or if has one copy (in the case of males). This also means that if the individual possesses the dominant H allele, he or she will not have hemophilia. Therefore, when performing the punnet table of section 2, we can observe that only one of four descendants would present hemophilia and in this case, it would be a male with genotype X^h Y (25% male), and only one of four would be a carrier that doesn't present hemophilia and in this case, it would be a woman with genotype X^H X^h (25% female)

Answer:

Grasslands (?)

Explanation:

You didn't give much context, but grasslands have warm temperatures and are generally dominated by grass--

Tropical grasslands have dry and wet seasons that remain warm all the time.

Temperate grasslands have cold winters and warm summers with some rain.

The most likely answer is tropical grasslands because they are warm all the time. (grasslands is a more open answer)

The two types of digestion include the following below:

This is referred to as the process in which food is broken down into smaller substances so as to be acted on by enzymes and assimilated into the bloodstream for the optimal functioning of the body.

Mechanical digestion happens in the mouth and it involves processes such as chewing while chemical digestion involves the breakdown of food through enzymatic actions.

Read more about Digestion here https://brainly.com/question/21470803

#SPJ1

The telencephalon is formed by four major structures: cerebral cortex (the hemispheres parts of the brain), limbic forebrain (brain part where you can find amigdala), basal ganglia, and the olfactory system. There are also the subcortical structures that includes the hippocampus (part og hippocampal formation in the brain), and amygdala (brain center to regulate memory and others associated functions). The telencephalon is the farthest end of the neural tube, being during the developtment of the organism divided into two structures that will form the cerebral hemispheres. The cerebral cortex is also divided into prefrontal cortex, motor cortex, occipital cortex, and so on.

The endosymbiotic theory states that some organelles in eukaryotic cells are original from prokaryotic microbes (bacteria), being mitochondria and chloroplast the example of the theory. Therefore, for the students demonstrate the endosymbiotic theory with the biological material that was offered to them they have to show the big bacteria ingesting the small one.

Genetic diseases or abnormalities can be inherited or a result of a mutation, which is a change in the nucleotide sequence in the DNA of the organism.

Mutations can happen as a result of errors during mitosis or meiosis, as well as by damage from exposure to UV radiation or a chemical substance.

So, the right answer is mutation (option A)

EXPLANATION/ANSWER:

The term "plankton" comes from the Greek word "planktos" which means wandering. Planktons are microscopic organisms that are floating and being carried by tides and currents. There are two types of planktons: phytoplankton and zooplankton. Phytoplanktons are aquatic microorganisms that have chlorophyll and can make food from sunlight. Zooplanktons are aquatic microorganisms that consume phytoplanktons or other zooplanktons.

The correct option is species. Species are individuals linked by their reproductive characteristics and often by their evolutionary mechanisms and history.

Though DNA is responsible for the instructions for the assembly process, it is RNA that synthesizes (assemles) the proteins.

The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach in 1905. The diagram is used by biologists to determine the probability of an offspring having a particular genotype.

Answer: Punnet Square

The correct answer is Artificial selection.

Humans interfere in the natural process of organisms that they slect the desirable trait for the organisms that they think best will help the organisms to adapt well into their environment.

Giraffes are believed to have short necks but there was a chance in neck length variations. Some giraffes have a little longer compared to the average length. The main source of nutrition for giraffes is tree leaves. Maybe there was an environmental change that occurred that there was a limited source of leaves and as a result, there were more giraffes than trees; therefore, there is a struggle for existence.

In this event, variation, fitness differences, and inheritance (3 ingredients of natural selection) must occur for the species to survive. Longer necked giraffes are more likely to reach the leaves of the trees and have a higher chance of survival and reproduction; thus, they have greater fitness. This trait (long necks) was passed on to the offspring and eventually, all giraffes have long necks.

The allele frequency of the population of giraffes eventually changes to favor the trait that will give the species a higher chance of survival in their environment.

Answer:

Cofactors are inorganic or small organic molecules that bind enzymes to enable or enhance their activity. Common inorganic cofactors are metals, including but not limited to magnesium, manganese, zinc, molybdenum, cobalt, and copper.

Explanation:

Fragmentation and regeneration are forms of asexual reproduction.

There are no sexual cells involved, and they divide by mitosis, giving genetically identical individuals.

River ecosystem is also referred to as lotic ecosystem. Important descriptions of a river ecosystem includes the temperature, flow of water, floods, sediment transport, river bed features, and structure of habitat. It can also include the geographical area. Biotic factors can include the other plants and animals around the river including the land and aerial animals. Abiotic factors can also include substrate and composition aside from the temperature and light factors you already mentioned.

If the parents have XXrgrg and XYrg genotype, they have a 50% chance of producing an individual XX with red-colour deficiency.

Therefore, their offspring has 0% chance of being XY with normal colour vision.

The correct answer is TRUE,

Cells divide for three reasosn: growth, reproduction and repair.

Onion root tips and whitefish embryos presents cells that's always undergoing mitosis.

Onion root tips are always growing to get more water and nutrients from the soil, therefore mitosis is always occuring to duplicate the cells and maintain a growing rate.

Whitefish embryos have cells that are undergoing mitosis rapidly, as it is a phase of intense growing and formation of the embryos to become fish.

It wouldn't be respiration, because it has no direct relation to procreation. It wouldn't be independent assortment also, because this is the phenomenon that would explain the expected result. It also wouldn't be cytokinesis because this phenomenon is related to cell division, in which the combinations are already set. So, it is crossing-over, because this phenomenon occurs when ther is a switch between homologous chromatids occured during meiosis, which means that the chromosomes are so close to each other that they can trade parts of itselfs with other chromosomes, unexpectedly providing a different outcome than the one that was expected. So, the answer is crossing-over.

We have to consider that sexual and asexual reproduction differs in that the first one requires both organisms, one male and one female, to produce genetically different offspring, while the second one requires only one organism to produce genetically identical offspring.

About the kind of organisms mentioned in the answer options, we can say Protista includes Fungi, so the answer options that include both of them can be excluded, mainly due to choosing one of those options would exclude other organisms that can be in fact sexual or asexual.

Having this clear, we can say that organisms such as those belonging to the Plantae, Fungi, and Animalia kingdoms can reproduce in these two ways (unlike Archaea, and Eubacteria).

In the pictures below we can see examples of organisms of these species that can reproduce both asexually and sexually. In them, we can see ants (which can produce eggs with only the genetic load of one parental organism), plants (which can reproduce through branches, but also through seeds), and fungi (which can reproduce also mitotically and meiotically), as in the second answer option.

The renewable resources, that do not run out, but are continually renewed by nature, are:

I. Wind

II. Solar

III. Tidal

But not biomass.