BIOLOGY HIGH SCHOOL

According to the fossil record, which of these evolved after amphibians? Select two options.mammals
sponges
fish
bacteria
reptiles

the subject is science

Answers

Answer 1
Answer:

Answer:

The correct answers are Reptiles and Mammals.

Explanation:

I took the test on ed and got it correct

Answer 2
Answer:

a and e is the answer i have writ more so don't forget to rate pls and thx

Related Questions

which of the following species demonstrates a matriarchal structure? a.) Chinook salmon, b.) gannets, c.) orcas, d.) sea turtles
During periods of stress, the brain signals the adrenal glands to produce this hormone that stimulates the sympathetic nervous system:
The goals of biodiversity conservation include all of the following EXCEPT (1 point) protecting individual species. introducing exotic species into new environments. preserving habitats and ecosystems. making sure local people benefit from conservation efforts.
Harnessing the sun's energy to produce heat or electricity is
Mr. Potter’s physical science classes conducted an experiment to determine the density of aluminum. Here are the density values each class period came up with: 1st hour = 3.1 g/ml, 2nd hour = 3.05 g/ml, 3rd hour = 1.9 g/ml, 4th hour = 2.35 g/ml, 5th hour = 4.2 g/ml, and 6th hour = 4.0 g/ml. If Aluminum’s true density is 2.7 g/ml, how would you group the class values based on accuracy?a. Group: 1st, 3rd, 5th, and 6th hours, with one recorded decimal place in their values Group: 2nd and 4th hours, with two recorded decimal places in their values b. Group: 3rd and 4th hours, with values under the true density Group: 1st, 2nd, 5th, and 6th hours, with values over the true density c. Group: 3rd hour, with a 1 value Group: 4th hour, with a 2 value Group: 1st and 2nd hours, with 3 values Group: 5th and 6th hours, with 4 values d. Group all classes as accurate

Beetle pollinators of a particular plant are attracted to its flowers' bright orange color. The beetles not only pollinate the flowers but mate while inside of the flowers. A mutant version of the plant with red flowers becomes more common with the passage of time. A particular variant of the beetle prefers the red flowers to the orange flowers. Over time, these two beetle variants diverge from each other to such an extent that interbreeding is no longer possible. What kind of speciation has occurred in this example, and what has driven it? A. Allopatric speciation, ecological isolation.
B. Sympatric speciation, habitat differentiation.
C. Allopatric speciation, behavioral isolation.
D. Sympatric speciation, sexual selection.
E. Sympatric speciation, allopolyploidy.

Answers

Answer:

B. Sympatric speciation, habitat differentiation.

Explanation:

The right answer to our question is B, Sympatric speciation, habitat differentiation.

Edward Bagnall Poulton derived the term sympatric speciation in 1904. It is a mode of speciation, which entails new species emerging from an ancestral species that is still alive and extant. Both the emerging and ancestral species will exist in the same zone.

This speciation is found more in plants. There are different types of these speciations. Habitat differentiation is seen within sympatric speciation. It is found when mutations that exist in the same zone can make use of varying conditions. Allopatric speciation and parapatric speciation are the other types of speciation.

Final answer:

In the given scenario, Sympatric speciation driven by habitat differentiation has occurred. The different 'habitats' are represented by the flower color preferences of the beetle variants, leading them to diverge to the point of becoming distinct species.

Explanation:

The type of speciation that has occurred in the provided scenario is Sympatric speciation, driven by habitat differentiation. In this context, sympatric speciation refers to the process where new species evolve from a single ancestral species while inhabiting the same geographic region. In this case, the 'geographic region' is the color of the flowers. The red and orange flowers represent different 'habitats' for the beetles.

In terms of what has driven this speciation, it is habitat differentiation. This is because even though the beetles are occupying the same general physical area, their 'habitat' in terms of the color of the flowers they prefer has caused a divergence in their mating and, hence, their gene pools. Over time, this leads to the two beetle variants becoming so different that interbreeding is no longer possible, effectively rendering them distinct species.

Learn more about Sympatric speciation here:

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CRISPR-Cas9 technology is very innovative and made a breakthrough in biomedical science. What aspect of CRISPR-Cas9 making special from traditional PCR-based base changes? Briefly describe.

Answers

Here we go I got this for you:

CRISPR-Cas9 technology is indeed groundbreaking in biomedical science, and its key distinction from traditional PCR-based base changes lies in its precision and versatility.

**Precision:** CRISPR-Cas9 allows for highly specific and targeted modifications to an organism's DNA. It can precisely edit or replace individual DNA sequences with a high degree of accuracy. In contrast, traditional PCR-based methods are less precise and can introduce unintended mutations.

**Versatility:** CRISPR-Cas9 can be used not only to introduce base changes but also to perform a wide range of genetic manipulations, including gene knockout, gene activation, and gene insertion. It offers a versatile toolkit for genetic engineering and gene therapy applications. Traditional PCR-based methods are primarily focused on amplifying and sequencing DNA, lacking the versatility for such precise genome editing.

In summary, CRISPR-Cas9's precision and versatility make it a revolutionary tool for genetic editing, going beyond the capabilities of traditional PCR-based methods.

What term is defined as mathematical equations based on rules of physics

Answers

The answer is scientific laws. Laws vary from scientific theories in that they do not postulate an explanation of occurrences: they are simply refinements of the outcomes of recurrent observation. As such, a law is partial in applicability to conditions like those previously experimental, and may be create false when inferred.

How much of the worlds water is saltwater?

Answers

97.5% of the worlds water is salt water leaving 2.5% to be fresh water. 

a. Describe three conditions that create opportunities for normal microbiota to become an opportunistic pathogen. b. Explain three ways in which a bacterium could gain resistance to an antibiotic. c. You are a food manufacturer and you need to sterilize one of your products: powdered milk contained in a glass jar, what would be the best way to do this? d. Explain the mechanism of action of the aminoglycoside group of antibiotics? e. Explain two mechanisms which antibiotic resistant bacteria would be using to be resistant? f. Ten people a stuck in an elevator with a clumsy scientist who drops a vial containing 11 million cells of dangerous bacteria. When the vial breaks the sample aerosolizes. The ID50 of this organism is 5X105 cells and the LD50 is 1X106. How many of these people will potentially get sick and how many could die? Explain your answer

Answers

B.
genetic variation causes antibiotic resistance

Antibiotics, in one way or another, come from bacteria and fungi themselves. These antibiotics are produced naturally by the bacteria and fungi to eliminate competition with other bacteria present. With such great discovery in this endeavor, many lives were saved. It was not long that bacteria found ways to be resistant to antibiotics. Bacteria that was found on frozen dead bodies are resistant to modern antibiotics. There are two currently known ways as to how bacteria builds resistance against antibiotics. One would be mutation. Due to continued exposed to the antibiotic, the bacteria would adapt to it and cause themselves to mutate to combat antibiotic. The second one would be the swapping of DNA or as what scientists call the horizontal gene transfer. This only applies though to some or few bacteria that already has this feature built-in to them.

What is the difference between apoptotic and necrotic cells?

Answers

Answer:

Necrosis is an uncontrolled and passive process that usually affects large fields of cells, whereas apoptosis is a controlled and energy (ATP)-dependent event usually limited to individual or small clusters of cells.
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