Within a flock of birds, some birds have long narrow beaks, and other birds have short wide beaks. Environmental changes happen that make it harder for birds that have short wide beaks to find food. After several generations, most of the flock has long, narrow beaks. Which statement best describes the trait of the type of beak that a bird in this flock has?
A)Having a long, narrow beak is an inherited trait that is genetically passed down.
B)Having a long, narrow beak is an acquired trait that is determined by the availability of food.
C)Having a short, wide beak is an acquired trait that is found in birds that have learned to adapt to the environmental changes.
D)Having a short, wide beak is an inherited trait that is chosen by the bird as a result of its experiences.

Ans.

According to the study, H. erectus had a larger brain as compare to A. boisei and A. africanus, while A. boisei had a larger brain than A. africanus. It means the H. erectus had much advanced tool-making abilities as compared to A. boisei, so A. boisei would have been able to make less advanced tools than that of made by H. erectus.

Thus, the correct answer is option (C).

There are different kinds of studies. The toolmaking abilities of A. boisei would have compared to the A. boisei would have been able to make tools that were less advanced than H. erectus.

Based on the study carried out, H. erectus is known to have a larger brain when compare to A. boisei and A. africanus and also the A. boisei also has a bigger brain when compared to A. africanus.

This implies that the H. erectus has high abilities in terms of tool-making than A. boisei.  Boisei is known to be a Latin word that implies 'strongly built' which connote a specie that has a robust skulls and jaws.

Therefore, the correct answer is option (C).

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Answer:

If your using science to sovle problems that means you used scientific method like testing, conclusions, or hypothesis

Explanation:

Solving problems with science means that to solve the problem the scientific method is used. This method includes observing, research, hypothesis , test and conclusion with a help of lot high level theory.

Without science there is not strict process to follow in order to resolve the problem end get to a solution.

The correct answer is hypothesis.

The hypothesis can be defined and a statement, which is a possible answer to a scientific question. The hypothesis is proposed on the basis of the researches and the tests, which are already performed. the hypothesis can be tested through different experimental processes and can be proved or disproved according to the results obtained by the experimentation.

Answer:

Living cells can be observed using a light microscope; this is not possible with an electron microscope.Unlike electron microscopes, light microscopes allow scientists to observe changing movements in living cells.

Explanation:

The genetic makeup of an individual

Answer:

A

Explanation:

Answer: D.Specific enzymes break down starch into simple sugars.

Explanation:

The digestion of food in animals and in humans begins with mouth. In the mouth the teeth grind and mix the food contents with the saliva. The saliva is a fluid which contains enzymes such as salivary amylase which breaks down the starch into simple sugar molecules. Hence, facilitates in the digestion process.

Starch digestion begins in the mouth with the enzyme salivary amylase breaking starch down into maltose. This process continues in the small intestine, where pancreatic amylase further breaks it down into glucose or simple sugars.

Starch digestion begins in the mouth where the enzyme salivary amylase, present in saliva, starts the breakdown of starch into maltose, a simpler sugar. This is known as the process of starch digestion. Thus, the correct answer to your question is 'Specific enzymes break down starch into simple sugars' (Option D). Digestion continues in the small intestine where another enzyme, pancreatic amylase, continues this process turning the maltose into glucose, the simplest form of sugar that the body can use for energy.

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RuBP              is the answer for sure.

With the given results, in order for the nurse to identify the clinical manifestations of diabetic ketoacidosis in which the client would likely have, she needs to observe the following manifestations such as; rise of the blood glucose level which beyond the normal range, there is a rapid breathing which would likely occur that he or she finds it difficult to breathe normally, there is a presence of pain in the abdomen, excessive need of fluids as he or she manifest excessive thirst and lastly, his or her results in the plasma bicarbonate is in the low level. These manifestations could indicate that the client has diabetic ketoacidosis.

Answer:

the answer is Brc2 bc of the changes in the mutation

Explanation:

BRCA1 and BRCA2 mutations both increase the risk of certain cancers, primarily breast and ovarian cancer. However, BRCA1 mutations have been associated with a higher risk compared to BRCA2 mutations.

Answer: Clothing is made from plant fibers.

Plants are the greatest source of fibers used by textile industry for production of cloths. A fiber is obtain from a natural plant source it is spun into yarn and yarn is converted into fabric used for making cloths. Natural plant fibers are cotton, jute, linen, corn and coir(coconut) fibers are necessary for textile industry.

The process of joining nucleotides to build a new strand of DNA is carried out by an enzyme called DNA polymerase. DNA polymerase plays a central role in DNA replication, repair, and synthesis during processes like DNA transcription and DNA repair.

During DNA replication, DNA polymerase catalyzes the formation of phosphodiester bonds between adjacent nucleotides, thereby linking them together to form a new DNA strand complementary to the template strand. This process occurs in the 5' to 3' direction, meaning that nucleotides are added to the growing DNA strand at the 3' end.

DNA polymerase requires several components and cofactors for its activity. These include a template DNA strand, a primer (a short strand of RNA or DNA complementary to the template DNA), deoxyribonucleotide triphosphates (dNTPs) as substrates, magnesium ions (Mg2+) as cofactors, and other accessory proteins that assist in the replication process.

The mechanism of DNA synthesis by DNA polymerase involves several steps:

1. Initiation: DNA polymerase binds to the primer-template junction, forming a complex known as the DNA polymerase-DNA complex.

2. Elongation: DNA polymerase adds nucleotides to the 3' end of the primer strand in a stepwise fashion, using the template DNA strand as a guide. Each incoming nucleotide forms base pairs with the complementary nucleotide on the template strand, and DNA polymerase catalyzes the formation of a phosphodiester bond between the 3' hydroxyl group of the last nucleotide in the growing strand and the α-phosphate group of the incoming nucleotide.

3. Termination: DNA polymerase continues synthesizing the new DNA strand until it reaches the end of the template strand or encounters an obstacle. Once replication is complete, the newly synthesized DNA strand dissociates from the DNA polymerase-DNA complex.

DNA polymerases are highly accurate enzymes, with built-in proofreading mechanisms that help to maintain the fidelity of DNA replication by correcting errors in base pairing. However, errors can still occur, leading to mutations. In such cases, other DNA repair mechanisms come into play to correct the errors and maintain the integrity of the genetic material.

In summary, DNA polymerase is responsible for joining nucleotides to build a new strand of DNA during processes like DNA replication, repair, and synthesis. Its ability to catalyze the formation of phosphodiester bonds between nucleotides is essential for the accurate transmission of genetic information from one generation to the next.

The complete question is:

Which item is responsible for joining nucleotides to build a new stand of DNA?

Answer:

The domain is the least specific level of classification.

Explanation:

The levels of classification for life, or taxonomic rank, ordered from least specific to most specific, are:

We can remember the sequence of these terms using a mnemonic device (a memorable sentence, in which the first letter for each word corresponds with a level):

Did King Philip come over for gremlin soup?

There three domains are:

Bacteria and archea are both prokaryotes, meaning they do not have a membrane-bound nucleus.

Eurkarya, which includes the animal kingdom (and thus the human species), have a membrane-bound nucleus.

In biological taxonomy, the 'Domain' is the least specific level of classification. It covers a broad range of organisms, while 'Species' is the most specific level, referring to a certain kind of organism.

The least specific level of classification in biological taxonomy is Domain. Here's an explanation to help you understand:

Biology classifies all living things using a hierarchical system starting with the broadest categories and ending with the most specific. The order from least specific (broadest) to most specific (narrowest) is: Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species. So, a Domain includes a large number of different organisms, while Species refers to a specific type of organism. For example, in the 'Domain' category, you might have 'Eukarya' which covers all organisms with eukaryotic cells, including plants, animals, fungi, and protists. But in the 'Species' level, you get to a specific type, like 'Homo sapiens' (human beings).

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Answer:

Which evidence supports the endosymbiotic theory?

Mitochondria and chloroplasts have a separate, simpler DNA from the nucleus DNA of a eukaryotic cell. These organelles' DNA resembles the DNA of prokaryotic cells.

Mitochondria and chloroplasts self-replicate by a cell division process similar to binary fission, which is the way prokaryotes divide.

The way mitochondria and chloroplasts synthesize proteins within the eukaryote cell is more similar to prokaryotes than to eukaryotes.

There are living examples of prokaryotes, like cyanobacteria, that share similar features with both mitochondria and chloroplasts of eukaryotic cells.

Observations of prokaryotic cells engulfing other prokaryotic cells and the engulfed cells becoming the organelles have been recorded.