Darwin’s finches evolved on an island. What is the main reason that islands often provide good examples of evolution?
Answer:
They allow for automatic biogeographic isolation. In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils.
Explanation:
(found it on quizlet feel free to rewrite in you own words)
A species of wasp dies out in a prairie ecosystem. This species used to perform the important task of pollinating a widespread plant species. This ecosystem will be less damaged by this local extinction if
Answer:
C.
there are other insect species that also pollinate the plant.
Explanation:
Selecting resources with reliable credentials and expertise is _____________________________.
A. important for scientific research only
B. important for any information you look up, on any topic
C. not important, everyone’s ideas are equally valid
D. only important when you are looking for medical advice
Answer:
B. important for any information you look up, on any topic
Explanation:
You want reliable information whenever you are trying to understand something that is unknown to you (not just when you are doing research or need medical advice), and you get reliable information from people with the right credentials and expertise on the given matter.
Red rose color is produced by either of two genes, R/r and I/i. The dominant alleles of both these genes produce red pigment, and one of these genes is enough to produce a red flower. The recessive alleles are nonfunctional and produce no pigment (remember that no pigment = white.
Required:
What is the overall phenotypic ratio from the cross above?
Answer:
3:1
Explanation:
To find out the phenotypic ratio, we need to do a Punnet Square.
We know that R and I are the dominant alleles that produce red flowers, and r and i are the recessive traits.
║R ║ r
I ║RI║Ir
i ║Ri║ir
The genotype ratio would be 3 because the dominant traits are present three times (RI, Ir, and Ri) and 1 for the recessive trait since it only appears once in the Punnet Square (ir). In conclusion, the phenotypic ratio form the roses are 3:1
Complete question:
Red rose color is produced by either of two genes, R/r and I/i. The dominant alleles of both these genes produce red pigment, and one of these genes is enough to produce a red flower. The recessive alleles are nonfunctional and produce no pigment (remember that no pigment = white.
a. Given the allele combinations below, state the phenotype and expected ratio (as a fraction that would result from a cross of two dibybrid roses. (Ex: A B : Green 9/16)
R-I-
rrI-
R-ii
rrii
b. What is the overall phenotypic ratio from the cross above? (Ex black: 3 yellow : 1 green)
c. What type of epistasis is this? (Note there is a word bank below) Dominant epistasis, Dominant suppression, Duplicate gene action, Recessive epistasis, Complementary gene action No Epistasis
Answer:
9/16 R-I-, 3/16 R-ii, 3/16 rrI-, 1/16 rrii15:1Duplicate gene actionExplanation:
Available data:
Red rose color produced by two diallelic genesGene 1: Dominant allele RRecessive allele r
Gene2: Dominant allele IRecessive allele i
The dominant alleles of both these genes produce the red pigmentOne of these genes is enough to produce a red flowerThe recessive alleles produce no pigmenta. Given the allele combinations below, state the phenotype and expected ratio (as a fraction) that would result from a cross of two dibybrid roses.
R-I-
rrI-
R-ii
rrii
Cross: Two dihybrids
Parentals) Rr Ii x Rr Ii
Gametes) RI, Ri, rI, ri
RI, Ri, rI, ri
Punnett square) RI Ri rI ri
RI RRII RRIi RrII RrIi
Ri RRIi RRii RrIi Rrii
rI RrII RrIi rrII rrIi
ri RrIi Rrii rrIi rrii
F1) 9/16 individuals are expected to be red R-I-
3/16 individuals are expected to be red R-ii
3/16 individuals are expected to be red rrI-
1/16 individual is expected to be white rrii
b. What is the overall phenotypic ratio from the cross above? (Ex black: 3 yellow : 1 green)
Red individuals 15/16
White individual 1/16
Phenotypic ratio → 15:1
c. What type of epistasis is this? Dominant epistasis, Dominant suppression, Duplicate gene action, Recessive epistasis, Complementary gene action No Epistasis
Duplicate gene action. There are two genes involved in the expression of a phenotype, and the presence of at least one dominant allele is enough to produce the dominant phenotype (in this case, red color). The phenotypic ratio of this interaction is always 15:1. This is an example of dominant duplicate genes.
Drag the tiles to the correct boxes to complete the pairs.
Match the mRNA sequences to their DNA sequences.
AUUACGCAU
CCGAAAUGU
GAUCAUUAC
UUUUUAACG
AAAAATTGC
arrowRight
GGCTTTACA
arrowRight
TAATGCGTA
arrowRight
CTAGTAATG
arrowRight
Answer:
mRNA sequence1=AUUACGCAU
DNA sequence1=TAATGCGTA
mRNA sequence2=CCGAAAUGU
DNA sequence2=GGCTTTACA
mRNA sequence 3=GAUCAUUAC
DNA sequence3=CTAGTAATG
mRNA sequence4=UUUUUAACG0
DNA sequence4=AAAAATTGC
Currently, two of the living elephant species (X and Y) are placed in the genus Loxodonta, and a third surviving species (Z) is placed in the genus Elephas. Assuming this classification reflects evolutionary relatedness. Draw the most accurate evolutionary tree.
Answer:
Explanation:
The evolutionary tree is composed of,
Lineages → These are the taxonomic groups of interest placed in the extremes of the lines called branches ⇒ Elephant species X, Y, Z Nodes → These are the ramification points, which are also known as divergence points. They represent the location of the most recent common ancestor ⇒ The red spot in the graph shows the location o the most recent ancestor between species X and Y Root → This is the older common ancestor that all lineages share. The first one in the tree ⇒ The blue spot in the graph show the oldest common ancestor shared by the three speciesTwo or more lineages are more related to each other if they share a recent common ancestor -In this example, X and Y are more related to each other-. This means that they all diverge from the same node.
Two or more lineages are less related to each other if they lack a recent common ancestor. This is, the node from which these lineages diverge is placed far away in the tree.
What is the complimentary dna strand for TCTTAAATGATCGAT
Answer:
AGAATTTACTAGCTA
Explanation:
The DNA strand pairs are:
Adenine (A) -- Thymine (T)
Cytosine (C) -- Guanine (G)
and vice versa.
The given strand:
TCTTAAATGATCGAT
Based on the given pairs above, your answer will be:
AGAATTTACTAGCTA
~
How vulnerable
How vulnerable is the human body? I was told to never be afraid of anyone
Answer:
I don't know what you mean but emotionally the human body is very fragile and physically the human body is very strong
ba kiểu truyền tín hiệu của tế baò
write paragraph about digestion of food in brief
Answer:
Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream.
Explanation:
according to wikipedia!
Digestion is nothing but breaking down of substances into simpler forms, which the body can use. We eat many things and they have very complex compounds, our body cannot use these compounds. So, different parts of our digestive system breaks down different compounds to simpler forms, so that our body can use it for different functions.
IMPORTANCE OF ENZYMES??
Answer:
Enzymes create chemical reactions in the body. They actually speed up the rate of a chemical reaction to help support life. The enzymes in your body help to perform very important tasks. These include building muscle, destroying toxins, and breaking down food particles during digestion.
Explanation:
Where do stars form?
Answer:
Stars are formed within clouds of dust...
Ari drew a diagram to show organisms in an ecosystem.
A flowchart. Cycle 1: 1, Grass. 2, Grasshopper. 3, Shrew or Mouse. 4, Fox. Cycle 2: 1, Grass. 2, Mouse. 3, Fox or Snake. Cycle 3: 1, Grass. 2, Rabbit. 3, Fox.
What did Ari draw?
a food chain
a trophic chain
a food web
an energy web
Answer: Ari draw a food web.
Explanation:
A single ecosystem which contains all the food chains is called a food web.
In a food web each living thing present in a food web is a part of multiple food chains. Hence, food webs tend to represent the overlapping of food chains in that ecosystem.
The flow chart drawn by Ari represents that the living things present in cycle 1 are part of cycle 2 and cycle 3. Also, living things present in cycle 2 are part of cycle 1 and cycle 3.
A food chain is basically a single path where each organism is dependent of the other as a source of food without any overlapping.
Thus, we can conclude that Ari draw a food web.
Answer:
c
Explanation:
Describe sea turtle populations during the late 1400’s
Answer:
6.5 million sea turtles
Recent estimates show us that there are nearly 6.5 million sea turtles left in the wild with very different numbers for each species, e.g. population estimates for the critically endangered hawksbill turtle range from 83,000 to possibly only 57,000 individuals left worldwide.
Explanation:
hope it helps you
porfavor especifica que quieres que te diga
Explanation:
Is it true or false?????
Answer:
Explanation: true
The young, coiled-up leaf in true ferns is called what
fiddleheads is the answer ~~~~
4. The inner membrane of the mitochondria is impermeable to ions. How does this fit with what
you've learned about membrane structure? Why is this important to cellular respiration?
Answer:
The inner mitochondrial membrane contains proteins involved in the electron transport chain. This chain releases energy that is then used to generate an electrochemical gradient, which is subsequently used to synthesize ATP
Explanation:
Mitochondria are membrane-bound organelles that have an inner membrane separated from an outer membrane by the intermembrane space. Moreover, the mitochondrial matrix is located within the inner membrane. The inner mitochondrial membrane contains proteins involved in the electron transport chain and ATP synthesis. Oxidative phosphorylation (electron transport chain) is the third stage of cellular respiration in aerobic organisms in which ATP is generated by transferring electrons from NADH or FADH2 to O2 by a series of electron carriers located in the inner mitochondrial membrane. The trans-membrane complexes of electron carriers are multiprotein enzyme complexes (I–V) and electron carriers (i.e., coenzyme Q10 and cytochrome c) required for the communication between complexes. The electron transport chain is coupled to proton transfer from the matrix out to the intermembrane space, thereby generating a proton gradient which is then used by ATP synthases to synthesize ATP.
What are altitudes? help pls
Answer:
Altitude is how high vertically something is by definition
1 : height above a certain level and especially above sea level. 2 : the perpendicular distance from the base of a geometric figure to the vertex or to the side parallel to the base.
what will most likely happen if a population is large and no migration, mutation, or environmental change occurs?
1. natural selection will increase
2. nonrandom mating will start to occur
3. the rate of evolution will increase
4. gene frequencies will remain constant
Density is mass divided by volume (d = m ÷ v). Based on the graph, what happens to a fixed mass of water when it is cooled from 4°C to 0°C?
Answer:
you get -29580 C
Explanation:
you have to add and then multiply 4 by it 4 time and then use the formula and change it to a geometriconaical formula to get that answe
Does the number of cell layers or the cell shape play a role in the function of the epithelial tissue
Short Answer Questions
What TWO things are necessary for evolution by natural selection to
occur?
The diploid number for the tasmanian devil is.
Answer:
14.
Explanation:
A Tasmanian Devil has a diploid number of chromosome which is 14 while on the other hand, there are 7 number of chromosomes in the sex cells. The sex cells i.e. sperm and egg has haploid number of chromosome so the number of chromosomes in sex cells of Tasmanian Devil is 7 while on the other hand, in the somatic cells or body cells there is diploid means double number of chromosome so the diploid number of chromosome for Tasmanian Devil is 14.
When comparing energy and chemicals in an ecosystem?
Answer:
Chemical nutrients and energy tend to flow in the same direction for most of an ecosystem. The big difference is that the chemical nutrients are ultimately recycled in the ecosystem while the energy is ultimately lost from the ecosystem to the universe at large. Energy in any ecosystem ultimately comes from the Sun.
Monocercomonoides are a genus of single-celled organisms that live as parasites in the guts of small animals. They lack mitochondria, but other evidence shows them to be most closely related to members of the excavates. Looking at the tree for eukaryotes, what can you conclude about the Monocercomonoides?
A. Since excavates are eukaryotes, it is extremely unusual for one of them to lack mitochondria.
B. Excavates branched off before the evolution of mitochondria, so the absence is not surprising.
C. Since they are parasites of animals, they should be placed within the opisthokont branch of the tree.
D. A phylogenetic tree reflects evolutionary relationships, so they should be placed within the excavates.
E. Their lineage likely had mitochondria but lost them at some point.
Answer: A. Excavates branched off before the evolution of mitochondria, so the absence is not surprising.
C. Since they are parasites of animals, they should be placed within the opisthokont branch of the tree.
E. Their lineage likely had mitochondria but lost them at some point.
Explanation:
Based on the information given, the conclusion that can be made about the monocercomonoides include:
• Excavates branched off before the evolution of mitochondria, so the absence is not surprising.
• Since they are parasites of animals, they should be placed within the opisthokont branch of the tree.
• Their lineage likely had mitochondria but lost them at some point.
hey loves, im helping a friend do an assignment because they’re sick and in super confused.
Answer:
See below
Explanation:
Sandstone deposited, limestone deposited, shale deposited, limestone deposited, shale deposited, erosion, igneous rock intrusion, fault along XY
3. DNA and Protein similarities are often used for molecular evidence of evolution. What is being compared to show relatedness among species? Explain how this works.
Answer:
The sharing of common ancestors
how does the energy from the sun cause evaporation
Answer:
In the water cycle, evaporation occurs when sunlight warms the surface of the water. The heat from the sun makes the water molecules move faster and faster, until they move so fast they escape as a gas. ... When it is cool enough, the water vapor condenses and returns to liquid water.
what must happen in order for an ecosystem to survive
Hope this helps
Answer:
An ecosystem must contain producers, consumers, decomposers, and dead.All ecosystems require energy from an external source and that would be the sun.Plants need sunlight to photosynthesise and produce glucose, providing an energy source for other organisms.
The predatory bacterium Bdellovibrio bacteriovorus is able to penetrate a gram-negative bacterium that has a slimy cell covering. What is the correct sequence of structures penetrated by B. bacteriovorus on its way to the prey's cytoplasm
Answer:
The order of bacterial structures that the bacteria would penetrate would be:
Capsule.Lipopolysaccharide MembranepeptidoglycanPhospholipids Membrane.Explanation:
A parasite like B. bacteriovorus faces some challenges in getting into a bacterial cell. This is because these cells have devices and strategies to prevent the entry of parasites and ensure the survival of the bacteria. The first challenge would be to penetrate the bacterial capsule. The capsule is a structure that is located around many bacteria. This structure is rigid, with sharp edges and thick thickness, which protects the bacteria from external agents. If B. bacteriovorus manages to go beyond the capsule, it will find a membrane, also thick, composed mainly of lipopolysaccharides, which will also provide protection and try to prevent the entry of the parasite. If this membrane is crossed, B. bacteriovorus will face another layer called peptidoglycan. This layer establishes itself as a cell wall, being very difficult to break. Some bacteria present one more layer after peptidoglycan, which is a membrane made by Phospholipids, which is highly selective and difficult to break, but is more fragile than the previous layers. Only after overcoming all these structures, the parasite will have access to the bacterial cel
