Scientists think that dolphins and whales may have evolved from a common ancestor because they have similar anatomies.
What is a common ancestor?A common means different animals now, have evolved from a single ancestor or animal.
These animals may share common characters and structures.
Whales, dolphins, and porpoises are evolved from a common ancestor; cetacean.
The animals that evolved from cetaceans are all aquatic, primitive cetaceans were amphibians too.
Thus, the correct option is B) They have similar anatomies.
Learn more about ancestors
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Genes determine the______ of organisms.
Can you please help me with both
he coral reef ecosystem is full of interactions among organisms. Large fish called barracuda feed on smaller fish called parrot fish. The parrot fish feed on algae. Which of these living things would be responsible for releasing oxygen from the process of photosynthesis?
Answer:
algae because algae is an aquatic plant.
Answer: The answer should be algae! I just had to take a quiz on this.
Explanation:
PUNTOS POSIB!
25 Zoogeographic regions are characterized by the presence of specific groups of animals. These
regions are determined by the taxonomic or phylogenetic relationships of animals. The map
shows the zoogeographic regions proposed by the naturalist Alfred Russel Wallace in 1876.
Zoogeographic Regions
Nearctic
Palearctic
Ethiopian
KEY
Neotropical
Geographical barriers
such as mountains or
bodies of water
Australasian
The similarities of organisms in which two areas numbered above provide the best evidence
for common ancestry between the organisms in both locations?
Aim
When dividing the world into zoogeographical regions, Alfred Russel Wallace stipulated a set of criteria by which regions should be determined, foremost the use of generic rather than species distributions. Yet, recent updates of Wallace's scheme have not followed his reasoning, probably explaining in part the discrepancies found. Using a recently developed quantitative method, we evaluated the world's zoogeographical regions following his criteria as closely as possible.
Location
Global.
Methods
We subjected presence–absence data from range maps of birds, mammals and amphibians to an innovative clustering algorithm, affinity propagation. We used genera as our taxonomic rank, although species and familial ranks were also assessed, to evaluate how divergence from Wallace's criteria influences the results. We also accepted Wallace's argument that bats and migratory birds should be excluded (although he was contradictory about the birds) and devised a procedure to determine the optimal number of regions to eliminate subjectivity in delimiting the number of regions.
Results
Regions attained using genera (eight for mammals and birds and six for amphibians) strongly coincided with the regions proposed by Wallace. The regions for amphibians were nearly identical to Wallace's scheme, whereas we obtained two new ‘regions’ for mammals and two for birds that largely coincide with Wallace's subregions. As argued by Wallace, there are strong reasons not to consider these as being equivalent to the six main regions. Species distributions generated many small regions related to contemporary climate and vegetation patterns, whereas at the familial rank regions were very broad. The differences between our generic maps and Wallace's all involve areas which he identified as being uncertain in his regionalization.
Main conclusions
Despite more than 135 years of additional knowledge of distributions, the shuffling of generic concepts, and the development of computers and complex analytical techniques, Wallace's zoogeographical regions appear to be no less valid than they were when he proposed them. Recent studies re‐evaluating Wallace's scheme should not be considered updates as such because they have not followed Wallace's reasoning, and all computer‐based analyses, including this one, are subject to the vagaries of the particular methods used.
Answer:
When dividing the world into zoogeographical regions, Alfred Russel Wallace stipulated a set of criteria by which regions should be determined, foremost the use of generic rather than species distributions. Yet, recent updates of Wallace's scheme have not followed his reasoning, probably explaining in part the discrepancies found. Using a recently developed quantitative method, we evaluated the world's zoogeographical regions following his criteria as closely as possible.
Pick the correct order for the level of organization in a living organism. (from smallest to largest)
Tissue, cell, organ, organism, organ system
Organism, organ, organ system, tissue, cell
Cell, tissue, organ, organ system, organism
Answer:
cell, tissue, organ, organ system, organism
Explanation:
a group of cell make tissue.....
If a ⊥ b and b ∥ c, then _____
a ∥ b.
a ∥ c.
a ⊥ c.
b ⊥ c.
THE ANSWER IS NOT A//C
Answer:
a is perpendicular to c will be the answer.
Kingdom Fungi
Question 11 options:
Eukaryotic
Prokaryotic
Unicellular
Multicellular
Autotrophic
Heterotrophic
Answer:
Eukaryotic in nature. They are higher classes of Eukaryotic organisms
A dendrochronologist interprets:
A: fossils
B: pollen grains
C: tree rings
D: rock formations
help me please......
Answer:
1) g
2) d
3) f
4) c
5) b
6) a
7) e
How would you convert a spring into a straight piece of metal using the same approach as topoisomerase in DNA replication?
Answer:
It would be necessary to make small breaks in the spring and then align the pieces, forming a straight piece.
Explanation:
Topoisomerase is the enzyme responsible for unwinding the DNA molecule during replication. To do this, topoisomerase makes small breaks in the DNA molecule, but uses covalent bonds to hold these small pieces of DNA, causing the strands of DNA to pass over each other, aligning in a rectilinear topography.
What is one drawback of a field experiment?
A) It does not reflect complex interactions.
B) It cannot be controlled.
C) It is difficult to determine the cause and effect.
D) There are no manipulated variables.
Im not sure if it is B or C...
Answer:
B) It cannot be controlled
Answer:
B) It cannot be controlled.
Can you help me with both
Answer:
8. decisions
9. studied
What does a phylogenetic tree represent?
Answer:
A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.
Answer:
A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.
Explanation:
hey guys this is my question:
This is something that you have to do yourself but i suggest doing some research ^-^
A cell's mRNA loses all of its uracil. What will happen next?
If a cell's mRNA loses all of its uracils, then it will not undergo a protein synthesis or translation process.
as defected mRNA will not be able to form all anticodon thus there is no codon formation takes place for protein synthesis.
What are codon and anticodon?Codon: A codon is a trinucleotide sequence of DNA or RNA that corresponds to a specific amino acid.
Anticodon: An anticodon is a trinucleotide sequence complementary to that of a corresponding codon in a messenger RNA (mRNA) sequence.
Hence, If a cell's mRNA loses all of its uracils, then it will not undergo a protein synthesis or translation process.
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Have a question on a science quiz.
Answer:
4 C 5 B 6 B
Explanation:
Carrying capacity is defined as the
number of individuals that
can support.
Answer:
an area ig ......its of species ... individual that species can support
The organism shown is___
and it is a____
OA. single-celled; plant
ОВ.
multi-celled; plant
OC.
single-celled; bacteria
OD.
multi-celled; fungi
Answer: B
Explanation:
All vascular plants are multicellular.
How are alleles represented in genetics?
Biologists refer to dominant alleles as uppercase letters and recessive alleles as lowercase letters when referring to genotype.
What are alleles?Genetics and evolution define an allele as a variant of the same sequence of nucleotides at the same location on a lengthy DNA molecule.
The variant DNA sequences at a locus are known as alleles, and the chromosomal or genomic location of a gene or any other genetic element is referred to as a locus.
Alleles can be identified using just one capital or lowercase letter, two, three, or more letters, or letter/number combinations. Superscripts, subscripts, or both may be present in alleles.
Alleles that are recessive are denoted by lowercase letters, while dominant alleles are denoted by capital letters.
Thus, this way, the alleles are represented.
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At ground level, how are rain and hail similar?
Answer:
Sleet and hail are similar forms of precipitation. ... Sleet is partly frozen rain, and precipitation in the form of hail is basically ice balls. Graupel is formed from ice-coated snow crystals that fall to the Earth's surface. After falling to the ground, graupel is generally called snow pellets.
Explain how the data supports your hypothesis.
If needed, you can change your poison selection (above).
Answer: It is verified by testing it. If the data supports the hypothesis, then we consider the hypothesis to be verified and true. If however, the data does not support the hypothesis or refutes it, then the hypothesis is in trouble, and we have to come up with a different hypothesis to explain the observations.
Explanation:
Locate and name 3 of the circular muscles that control the movement of food through the system
Answer:
Peristalsis Is the Contraction of Muscle Tissue That Helps Move and Break Down Foodstuffs. The walls of the alimentary canal include layers of smooth muscle controlled by the autonomic nervous system. Alternating contraction and relaxation of these muscles is called peristalsis.
Explanation:
GIVING BRAINLIEST!!!! PLS HELP!!!!!! ;-;
Two adaptations are described below:
A porcupine has quills on its back which helps protect it from predators.
An opossum will pretend to be dead and become stiff when threatened.
Which statement is true about these adaptations?
A) Both the porcupine and the opossum are showing examples of physical characteristic adaptations.
B) The porcupine is showing a behavioral adaptation and the opossum is showing a life cycle adaptation.
C) Both the porcupine and the opossum are showing examples of behavioral adaptations.
D) The porcupine is showing a physical characteristic adaptation and the opossum is showing a behavioral adaptation.
Answer:
i am preety shure it is d
Explanation:
Answer: It's D
Explanation:
Quills are physical since u can see and touch them
Acting dead is behavioral since it's a behavior
Will mark brainliest!
In multicellular organisms what is an important job of all tissues, organs and organ systems?
Answer:
Answer choice 3
Explanation:
For example...
Liver- filter blood
Bladder- eliminate waste
Heart- pump blood
Etc..
Answer:
To maintain homeostasis
Explanation:
I did it and got it correct
A chemical equation uses symbols to show reactants and products of a chemical reaction tRUE OR FALSE
Answer:
True
Explanation:
This is because a chemical equation is the equation where chemical reactions are represented with symbols involving both reactants and products.
The reactants are written on the left hand side and products are written on the right hand side. Symbols are use to represent the chemical elements involved in the reaction. Solid, liquid and aqueous are also use as indicator whether the reactions are in that form.
17. Identify How would the
shuttle's motion change if
there were no gravitational
force between it and Earth?
Answer:
Gravity is one of those things we take completely for granted. And there are two things about it that we take for granted: the fact that it is always there, and the fact that it never changes. If the Earth's gravity were ever to change significantly, it would have a huge effect on nearly everything because so many things are designed around the current state of gravity. Before looking at changes in gravity, however, it is helpful to first understand what gravity is. Gravity is an attractive force between any two atoms. Let's say you take two golf balls and place them on a table. There will be an incredibly slight gravitational attraction between the atoms in those two golf balls. If you use two massive pieces of lead and some amazingly precise instruments, you can actually measure an infinitesimal attraction between them. It is only when you get a gigantic number of atoms together, as in the case of the planet Earth, that the force of gravitational attraction is significant. The reason why gravity on Earth never changes is that the mass of the Earth never changes. The only way to suddenly change the gravity on Earth would be to change the mass of the planet. A change in mass great enough to result in a change in gravity isn't going to happen anytime soon.
Explanation:
But let's ignore the physics and imagine that, one day, the planet's gravity turned off, and suddenly there was no force of gravity on planet Earth. This would turn out to be a pretty bad day. We depend on gravity to hold so many things down -- cars, people, furniture, pencils and papers on your desk, and so on. Everything not stuck in place would suddenly have no reason to stay down, it would start floating. But it's not just furniture and the like that would start to float. Two of the more important things held on the ground by gravity are the atmosphere and the water in the oceans, lakes, and rivers. Without gravity, the air in the atmosphere has no reason to hang around, and it would immediately leap into space. This is the problem the moon has -- the moon doesn't have enough gravity to keep an atmosphere around it, so it's in a near-vacuum. Without an atmosphere, any living thing would die immediately and anything liquid would boil away into space. In other words, no one would last long if the planet didn't have gravity. If gravity were to suddenly double, It would be almost as bad, because everything would be twice as heavy. There would be big problems with anything structural. Houses, bridges, skyscrapers, table legs, support columns, and so on are all sized for normal gravity. Most structures would collapse fairly quickly if you doubled the load on them. Trees and plants would have problems. Power lines would have problems. The air pressure would double and that would have a big effect on the weather. What this answer shows you is just how integral gravity is to our world. We can’t live without it, and we can't afford to have it change. It is one of the true constants in our lives!
Capital P represents purple lowercase p represents white. What color would a flower be if it was Pp?
Answer:
It depends:
Complete Dominance: Purple only
Incomplete Dominance: A Magenta Type Color
Co-Dominance: Purple and White at the same time
Which of these is digested by protasse
Answer:
C) Amino Acid
Explanation:
Protease breaks down proteins into amino acids
write a brief defintion of the term protist
Answer:
A protist is a eukaryote that isn't an animal, plant, or fungus.
Answer:
a single celled organisms of the kingdom Protista, such as a protzoan or simple alg.
If the normal spermatogenesis is disrupted, the gametes can have different chromosomes than expected. Which of the following is the most likely cause of one of the four gametes having two X
chromosomes and one having neither an X nor a Y chromosome?
Nondisjunction of the chromosomes during meiosis I
Nondisjunction of both the X and Y chromosomes during meiosis II
G
Nondisjunction of the Y chromosome during meiosis II
Nondisjunction of the X chromosome during meiosis II
Answer:
Nondisjunction of the X chromosome during meiosis II
Explanation:
Nondisjunction refers to the failure of homologous chromosomes and/or sister chromatids to separate during the process of cellular division. This phenomenon leads to daughter cells with aneuploidies, i.e, cells that have an abnormal number of chromosomes. In this case, non-disjunction of the X chromosome during spermatogenesis will lead to gametes having two X chromosomes and gametes without this sex chromosome.