Where do stars form?
Answer:
Stars are formed within clouds of dust...
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)
I need help on this please and thank you!
Answer:
I think it's probably 2,3, and 4 :))
Answer:
renewable resources can be replenished.
most renewable resources are easily available in nature.
all renewable resources are cost effective.
Receptors trigger one of two effector pathways resulting in changes in neuronal activity. These changes will, ultimately, effect gene expression. Which effector pathway is characterized by ion flux through transmitter-activated channels resulting in an altered membrane potential and neuronal activity
Complete question:
Receptors trigger one of two effector pathways resulting in changes in neuronal activity. These changes will, ultimately, effect gene expression. Which effector pathway is characterized by ion flux through transmitter-activated channels resulting in an altered membrane potential and neuronal activity?
A. Slow effector pathways
B. Modulated effector pathways
C. Rapid effector pathways
D. NMDA glutamate receptor pathways
Answer:
D. NMDA glutamate receptor pathways
Explanation:
The NMDA glutamatergic receptor is a cationic channel receptor modulated by a ligand that allows the transport of Na+, K+, and Ca2+. Under certain situations, it exhibits particular permeability to Ca2+. The receptor has different regions that are susceptible to modulation by endogenous and exogenous agents. The receptor can be found at most excitatory synapses, where it responds to the neurotransmitter glutamate. During synapsis, the presynaptic membrane releases L-glutamate, which is received by NMDA glutamatergic receptor. The receptor plays a regulatory role because activates signaling cascades that depend on calcium.
These receptors are involved in normal synaptic transmission, in a diverse physiological phenomenon, and might be responsible for neurodegenerative processes.
The NMDA glutamergic receptor is characterized by ion flux through transmitter-activated channels resulting in membrane potential.
What are transmitter-activated channels?Transmitter-activated channels are channels through cell membranes which are activated by binding of transmitters.
An example of a transmitter-activated channels is the NMDA glutamergic receptor.
The NMDA glutamergic receptor is a ligand-gated cationic channel that allows calcium, potassium and sodium ions through it.
Learn more about transmitter-activated channels at: https://brainly.com/question/17710689
Communication in the nervous system is called electrochemical. Why is this so?
Answer:
The movement of the action potential down the length of the axon is an electrical event, and movement of the neurotransmitter across the synaptic space represents the chemical portion of the process.
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.
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.
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
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
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
Does the number of cell layers or the cell shape play a role in the function of the epithelial tissue
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
How were the governments of Japan and Italy similar in the 1930s? Check all that apply.
Both were headed by groups of military leaders.
Both used extreme nationalism to win support.
Both were supported by citizen armies.
Both began programs of aggressive expansion.
Both were known as militarist governments.
Answer:
The correct answers are:
B. Both used extreme nationalism to win support.
D. Both began programs of aggressive expansion.
The governments of Japan and Italy similar in the 1930s because they both used extreme nationalism to win support and began programs of aggressive expansion.
Explanation:
Both governments (Japan and Italy) used extreme nationalism to win support and both began programs of aggressive expansion.
Similarity between government of Japan and Italy in 1930The governments of Japan with its territory in Asia had a similarity in government with that of government of Italy located in Europe.
In 1930 both governments (Japan and Italy) used extreme nationalism to win support in order to have more allies and they also began programs of aggressive expansion to increase their colonies.
Thus, the correct options include, both used extreme nationalism to win support and both began programs of aggressive expansion.
Learn more about extreme nationalism here: https://brainly.com/question/1112701
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.
Plants convert ________.
Answer:
sunlight into energy
Explanation:
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:
The young, coiled-up leaf in true ferns is called what
fiddleheads is the answer ~~~~
Now differentiate between laws and theories
Answer:
laws are so far permanent and can be amended, other-wise they can't be removed
theories, are different, theories are just theories that are ready to become something like a law, it is still in testing mode, it is like a bill in terms of law and has a possibility to become a passed law, just needs more hypothesis's and conclusions
Explanation:
law = law that is passed
theories = bills in law
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.
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.
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:
what is a Businesses favor:
Answer:
Like what would you want to do to start a business
Explanation:
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.
Hellooooooooooooooooooooooooo
Answer:
howwwwwww areeeee youuuuuuuu
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:
Short Answer Questions
What TWO things are necessary for evolution by natural selection to
occur?
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
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
