Answer:
B
Explanation: Seems like the most relevant answer.
This Roman snail, this cuttlefish, and this mussel have similarities and differences in their body structures. What does the information about these structures tell you about the ancestors of these species
Complete question:
This Roman snail, this cuttlefish, and this mussel have similarities and
differences in their body structures. What does the information about these
structures tell you about the ancestors of these species?
a) None share an ancestor population because different species cannot share an ancestor population. It is a coincidence that these species have some of the same body structures.
b) The Roman snail and the cuttlefish share an ancestor population, but they must not share an ancestor with mussels because mussels have no radula.
c) All three species share an ancestor population, but Roman snails and
cuttlefish share a more recent ancestor population. This is why they share
the radula structure.
d) We cannot make observations of ancestor populations from the past. It is
impossible to explain ancestors with only the information about the body
structures of different species.
Answer:
The correct answer is option C. All three species share an ancestor population, but Roman snails and cuttlefish share a more recent ancestor population. This is why they share the radula structure.
Explanation:
The three species belong to the mollusk phylum, and to the placophore group.
Each of them belongs to a different class.
The Roman snail belongs to the Gasteropod class, The cuttlefish belongs to the Cephalopod class, The mussel belongs to the Bivalve class.The tree classes share a common ancestor from which all the placophores evolved. Among them, we can mention the monoplacophore, gasteropod, cephalopod, bivalve, and scaphopods. Three branches diverged from this common ancestor. The first one originated the monoplacophore. The second one originated the common ancestor of gastropods and cephalopods. And the third one originated the common ancestor of bivalves and scaphopods. The tree-mentioned species inherited the mantle and the radula from their foreign common ancestor. But later in time, individuals that originated bivalves lost the radulla. This is why the three species have a mantle, but only gastropods and cephalopods have a radula. When each of these classes evolved, they developed their own traits,
Gastropods → muscular foot used for moving Cephalopods → pallial cavity for swimmingBivalves → byssal threads to attach to the rocksYou will find an image in the attached files that will help you understand this explanation.
What are wildfires? (With detail)
Answer:
A wildfire is an unplanned fire that burns in a natural area such as a forest, grassland, or prairie. Wildfires are often caused by human activity or a natural phenomenon such as lightning, and they can happen at any time or anywhere. In 50% of wildfires recorded, it is not known how they started.
Answer:
sự kiện lửa phát sinh trong một khu rừng, tác động hoặc làm tiêu hủy một số hoặc toàn bộ các thành phần của khu rừng đó.
Explanatin
Consider these phylogenetic trees. The first tree is based on physical characteristics. The second tree is based on structure, genetics, and evolutionary history. 2 phylogenetic trees are shown. The first tree has 3 branches that go to duck, platypus, and opossum. The second tree has 2 branches that go to duck and platypus. Opossum branches off of the platypus branch. Which can be concluded from a comparison of the two phylogenetic trees?
Complete question:
Consider these phylogenetic trees. The first tree is based on physical characteristics. The second tree is based on structure, genetics, and evolutionary history. Which can be concluded from a comparison of the two phylogenetic trees?
Phylogenetic trees are not subject to change. Classification can change with new discoveries and evidence. Classification does not change with more evidence. Phylogenetic trees are inaccurate.Answer:
2. Classification can change with new discoveries and evidence.
Explanation:
In phylogenetic trees, two species are more related if they have a recent common ancestor. On the other hand, two species will be less related if their common ancestor is not a recent one and is located far away in the tree.
The phylogenetic tree is composed of,
• Lineages → These are the taxonomic groups of interest placed in the extremes of the lines called branches.
• Nodes → These are the ramification points, which are also known as divergence points. They represent the location of the most recent common ancestor.
• Root → This is the older common ancestor that all lineages share. The first one in the tree.
Two or more lineages are more related to each other if they share a recent common ancestor. 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.
There are also different phylogenetic relationships between lineages.
• Apomorphies
• Plesiomorphies
• Homoplasy
In the exposed example, we have two trees.
Tree 1 ⇒ based on physical characteristicsTree 2 ⇒ based on structure, genetics, and evolutionary historyTree 1 reflects that the three species share a common ancestor that is far away in history. From this common ancestor (the blue point in the image), the duck first diverged. Later in evolution, Platypus diverged, and finally, Opossum diverged. The three species are morphologically well-differentiated from each other.
Tree 2 suggests a common ancestor of the three species (the blue point in the image), placed far away in history. From this common ancestor, the duck first diverged. But later in evolution, there was a second branch that diverged, and later originated Platypus and Opossum. According to the information provided by structure, genetics, and evolutionary history, Platypus and Opossum share a most recent common ancestor (the red point in the image).
Both trees provide equally important information. However, tree 2 is more detailed about evolutionary events because it involves many aspects of the animals´ history. Using one of the trees or the other, or both, will depend on the goals of the experiment.
The conclusion we can get from this comparison is that as long as there are discoveries and scientific advances, there will be a constant influx of information useful to recreate or explain evolution. Classification will keep changing with discoveries and evidence.
Answer
Classification can change with new discoveries and evidence.
Explanation:
I got 100% on the test
In activating cytokine receptors, a: Please choose the correct answer from the following choices, and then select the submit answer button. Answer choices cytokine dimer interacts reversibly with a receptor homodimer. cytokine monomer interacts reversibly with a receptor homodimer. cytokine dimer interacts reversibly with a receptor heterodimer. cytokine monomer interacts reversibly with a receptor heterodimer. None of the answers is correct.
Answer:
ewan ko hahahah ano ba dapat sagot comment kayo hahahha
El efisema pulmonar,provocado princioalmente por el consumo de cigarro, es una lesion que genera destruccion de los alveolos y, por lo tanto, zonas en las que no se produce el intercambio de gases ¿que consecuencias puede tener esta lesion en el organismo?
Answer:
El enfisema pulmonar disminuye la cantidad de tejido pulmonar, disminuyendo de este modo la cantidad de oxígeno que llega a la sangre (hipoxemia). El enfisema está asociado a diferentes trastornos incluyendo infecciones respiratorias recurrentes, pérdida de peso, debilidad muscular e hinchazón de los miembros inferiores.
Explanation:
El enfisema pulmonar es una enfermedad causada por la destrucción de los alvéolos pulmonares la cual está asociada a un aumento en la dificultad para respirar. Las principales causas de esta enfermedad son la exposición continua al humo del cigarrillo y otras sustancias nocivas para la salud, como así también a contaminantes presentes en la atmósfera. El enfisema pulmonar va progresivamente destruyendo las paredes alveolares pulmonares y los vasos sanguíneos que las recorren, disminuyendo así la elasticidad pulmonar, aumentando la proporción de aire que recorre los pulmones y de este modo también aumentando la distensibilidad pulmonar. Esta enfermedad disminuye la capacidad de oxigenar la sangre, generando una sensación constante de falta de aire (disnea) y cuadros progresivamente más severos de hipoxemia. Cuando el enfisema pulmonar se encuentra en grado avanzado, la única opción viable es el reemplazo del órgano dañado mediante un trasplante pulmonar. El enfisema puede estar asociado a infecciones respiratorias recurrentes (resfriados, gripe), pérdida de peso, debilidad muscular e hinchazón de los miembros inferiores (tobillos, pies y piernas).
Solve for the percentage of Feed B to be used in the ration?
Answer:
b
Explanation:
i used the formula to eliminate c, a, and d
Los métodos hormonales son eficientes porque: * A: impiden la entrada de los espermatozoides C: Se inhibe (no se desarrolla) la ovulación B: El óvulo jamás se encuentra con el espermatozoide D: Los espermatozoides quedan atrapados y no llegan al óvulo
Answer: C: Se inhibe (no se desarrolla) la ovulación.
Explanation:
Los métodos anticonceptivos se utilizan prevenir el embarazo no deseado, evitando que el esperma fertilice a un óvulo. Hay distintos tipos, los cuales se clasifican en:
Anticonceptivos hormonales: Contienen hormonas, tales como estrógeno y progesterona, que previenen la ovulación (es decir, la liberación de óvulos de los ovarios). De esta manera, al no haber óvulo disponible, por mas que hayan espermatozoides, no va a ocurrir ninguna fecundación. El método mas conocido es la píldora o pastilla anticonceptiva. Anticonceptivos de barrera: Proveen una barrera física que impide la fecundación al impedir el encuentro entre el óvulo y el espermatozoide. Por ejemplo, el uso de preservativos o condones. En estos métodos, se impide la entrada de los espermatozoides, no se encuentran con el óvulo y la esperma queda atrapada dentro del condón. Anticonceptivos permanentes: Proveen un método permanente como por ejemplo el Dispositivo Intrauterino que se coloca en el tracto uterino con una vida media de meses o años y posee un efecto espermicida que mata a los espermatozoides (por lo que no lograrán encontrar un óvulo). Otro ejemplo es la vasectomía, la cual es una cirugía que corta los conductos deferentes que transportan a los espermatozoides por lo que ya no pueden salir de los testículos para producir la fecundación (quedan atrapados dentro de los testículos, no entran al tracto uterino y no encuentran al óvulo)Tanto los métodos de barrera como los permanentes, no inhiben la ovulación aunque si impiden que el óvulo se encuentre con el espermatozoide. Entonces, los métodos hormonales son los únicos que logran inhibir la ovulación. Las píldoras que poseen las hormonas previamente mencionadas pero fabricadas sintéticamente. Las mismas mimetizan el efecto de las hormonas naturales producidas por el cuerpo, alterando el ciclo menstrual regular y así evitan el embarazo ya que no habrá óvulo disponible para fecundar. Además, también pueden alterarla mucosidad en el cuello del útero para que los espermatozoides no pueden atravesarlo y llegar al óvulo. De todas maneras, el objetivo principal y mas importante de los métodos hormonales es bloquear la ovulación.
Define (Chlorophyll)
Thank you!
Answer:
a green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis. Its molecule contains a magnesium atom held in a porphyrin ring.
Answer:
Chlorophyll is a green pigment that is in all green plants and cyanobacteria. It is responsible for the absorption of light that provides energy for photosynthesis.
Explanation:
Name this phase of mitosis *
•spindle disappears
chromosomes
start to
decondense
•nuclear
membrane
re-forms
-nucleolus
reappears
telophase
O anaphase
O metaphase
O prophase
Answer:
metaphase
Explanation:
A hunter illegally kills a wolf in Yellowstone National Park and attempts to bring the wolf's skull back to Florida. Which law is the hunter violating?
the National Park System Act
the Lacey Act
EPA
CITES
Answer:
the Lacey Act
Explanation:
on edge
Answer:
> The answer to your query is the Second Answer Choice, or “The Lacey Act”
Explanation:
> The National Park System Act installed the National Park System agency, and ensures that they keep the National Parks safe and as they are intended.
> The Lacey Act prohibits the transportation, trade, selling, or simply possessing, any illegally caught or killed wildlife.
> The EPA (Environmental Protection Agency) makes sure that people and the environment are kept safe from health risks (Pollution, etc). They also enforce regulations on things that may cause harm to people and the environment.
> CITES (Convention on International Trade in Endangered Species) makes sure that there is no INTERNATIONAL trade on endangered species. This is between other countries, and with species that are becoming (or at risk of becoming) exctinct.
> We can match our story to the descriptions and find that it matches up with the second one, or the Lacey Act. Since he had killed a wolf on National Park Territory, and transported and possessed it, he is responsible for breaking the law prohibiting just that.
> Once again, the correct answer is the Second Answer Choice (The Lacey Act).
> I hope this helped you with your query, along with any other questions you may have had on the subject. #LearningWithBrainly
In which order do organisms return
to an ecosystem during primary
succession after an area's ecosystem
has been wiped out?
A. trees, hearty shrubs, lichens
B. lichens, trees, hearty shrubs
C. lichens, hearty shrubs, trees
Answer:
lichens, hearty shrubs, trees
Explanation:
Order:
I-bare rocks,
II-pioneers (mosses, lichen, algae, fungi)
III-annual herbaceous plants
IV-perennial herbaceous plants and grasses
V-shrubs, VI-shade intolerant trees, VII-shade tolerant trees.
(please mark me brainliest) :)
Lichens, hearty shrubs, and trees is the correct order in which the organisms return to an ecosystem during primary succession after an area's ecosystem has been wiped out. Thus, the correct option is C.
What is Primary Succession?Primary succession is the ecological succession which begins in essentially the lifeless areas, such as the regions in which there is no soil or where the soil is incapable of sustaining life where no life form ever existed because of recent volcanic eruption, newly formed sand dunes, or rocks that are left from a retreating glaciers.
The correct order of the Primary Succession is:
Stage I- Bare rocks,
Stage II- Pioneer species such as mosses, lichen, algae, and fungi
Stage III- Annual herbaceous plants
Stage IV- Perennial herbaceous plants and grasses
Stage V- Shrubs, shade intolerant trees, and shade tolerant trees.
Therefore, the correct option is C.
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Sodium metal reacts whit hydrochloric acid to produce salt and hydrogen gas. What are the reactants in this chemical reaction
Answer:
Na (sodium) and HCl (hydrochloric acid)
Explanation:
The products are the salt and hydrogen gas
Whenever you see the word react it means those are the reactants (usually whatever compound comes before and after the word). Because they are reacting with each other.
Whenever they say "is produced" those are the products
Name the gametes a pea with the genotype Gg makes Group of answer choices
A gametes with the G gene
B gametes with the g gene
C gametes with G and gametes with g
Answer:
C
Explanation:
both parents have a 50% possibility to have this phenotype no matter what order
Which of the following statements BEST outlines why the coral reefs in the Caribbean are at risk?
a) There has been overfishing of invasive species
b) The Caribbean is a popular tourist destination
c) There have been many hurricanes in the Caribbean
d) There has been a decrease in the volume of sewage flowing into the reefs
Answer:
j5tj th hr rg eg eg ry rh gr df un j
Explanation:
r h h5 h5
Answer:
b) The Caribbean is a popular tourist destination
Please help me with this
Answer:
Its a semipermaeble mambrane
Explanation:
Semipermeable membrane is a type of biological or synthetic, polymeric membrane that will allow certain molecules or ions to pass through it by diffusion.
How do white blood cells protect the body against infections
Answer:
White blood cells, which are also called leukocytes or white corpuscles, are a cellular blood component that does not include hemoglobin, have a nucleus, are motile, and protect the body from infections and diseases through ingestion of foreign materials and cellular debris, destruction of infectious agents and cancer cells or production of antimicrobials.
Explanation:
There are 4,500 to 11,000 cells in the white blood of a healthy adult person per cubic mm of blood. During the day, fluctuations in the number of white cells take place; lower values during rest and higher during exercise are attained. The quantity of white cells increases abnormally, while the number decreases abnormally, Leukopenia.
Intensive physical activity, seizures, extreme emotional response, pain, pregnancy, labor, and specific conditions such as infections and intoxications may increase the counting of white cells. In reaction to some types of infections or medication, or in conjunction with certain illnesses such as chronic anemia, malnutrition, or allergy, the number may drop.
with reference to enzymes, what does "denatured" mean?
Answer:
Enzymes work consistently until they are dissolved, or become denatured. When enzymes denature, they are no longer active and cannot function. Extreme temperature and the wrong levels of pH -- a measure of a substance's acidity or alkalinity -- can cause enzymes to become denatured.
1. Which statement best describes the effects on an organism when
their environment changes?
O Some changes to an organism have helpful effects and some have harmful
effects.
Changes to an organism's environment often have no effect on the organism.
All changes to an organism's environment are harmful.
All changes to an organism's environment are helpful.
Answer:
firsttttttttttttttt.........................
Human activities would have the least immediate impact on A. The formation of fossil fuels B. Coral bleaching C. Overpopulation D. Eutrophication
Answer:
A. The formation of fossil fuels
Explanation:
Human activities would have the least immediate impact on the formation of fossil fuels because the fossil fuels are not affected the formation of fossil fuels. The formation of fossil fuels takes millions of years because it is a very slow process. Human activities greatly affected the coral reef bleaching, over population and Eutrophication due to the release of pollutant gases in the atmosphere that greatly impact the environment.
please help me please help me please help me please help me please help me please help me please help me please help me please help me please help me please help me please help me please help me please help me
Answer:
1. endothermic
2. exothermic
3. endothermic
4. exothermic
5. exothermic
Explanation:
what is the basic unit of matter?
Answer: Atoms constitute the fundamental units of matter, and are a constituent of each element. In large part, the mass of an atom is determined by its positively charged protons and neutral neutrons.
Explanation:
ya welcome BCHHHHHHHH
How do the process of DNA replication and the laws of inheritance help cells and individuals pass on their
traits?
DNA copying is otherwise known as DNA replication which is the process of producing 2 identical copies of DNA from one original DNA molecule during cell division. DNA copying is important because it generates variation during sexual reproduction which leads to evolution. Also, DNA copying helps in transfer of information or characters from the parents to the offsprings.
Mendel studied traits with only one mode of inheritance in pea plants. The inheritance of the traits he studied all followed the relatively simple pattern of dominant and recessive alleles for a single characteristic. There are several important modes of inheritance, discovered after Mendel’s work, that do not follow the dominant and recessive, single-gene model.
hope it helps
what is a function of ATP?
Answer:
Explanation:
Adenosine triphosphate (ATP) is the source of energy for use and storage at the cellular level. ... In addition to providing energy, the breakdown of ATP through hydrolysis serves a broad range of cell functions, including signaling and DNA/RNA synthesis.
¿Cuál de las siguientes opciones son adaptaciones de las plantas al desierto? a) Las raíces superficiales y extensas. b) Las hojas de color amarillas c) El cuerpo carnoso de las plantas d) Las hojas modificadas en forma de espina
Answer:
a) Las raíces superficiales y extensas
c) El cuerpo carnoso de las plantas
d) Las hojas modificadas en forma de espina
Explanation:
En biología, una adaptación refiere al proceso de cambio evolutivo mediante el cual los organismos de una especie/taxón hacen frente a determinadas condiciones ambientales. Las plantas han desarrollado diferentes adaptaciones en ambientes desérticos a fin de evitar al máximo la pérdida de agua, el factor más limitante en este tipo de ambientes. Las plantas capaces de soportar largos periodos de sequías se denominan xerófitas. En primer lugar, además de servir como una buena defensa contra herbívoros, las hojas en forma de espina le permiten a una planta almacenar agua durante los períodos de precipitaciones. En segundo lugar, las raíces de plantas desérticas pueden disponerse superficialmente con el objetivo de absorber la mayor cantidad de agua posible. En tercer lugar, las plantas suculentas o crasas son aquellas que tienen tejidos carnosos los cuales pueden almacenar agua en sus hojas, tallos o raíces. Durante los periodos de lluvia leve, las suculentas almacenan grandes cantidades de agua para sobrevivir durante la temporada seca (incluso existen especies vegetales que sobreviven solamente durante la temporada húmeda y producen semillas que toleran la temporada seca).
Which of the following is an example of artificial selection?
Answer: last option
Explanation:
artificial selection is when humans basically pick a desirable trait in a species and take steps to enhance or perpetuate that specific trait so that it's more common
the best option to describe this is the last one, because humans have bred domestic dogs to be less aggressive and more playful or friendly
can mercury diffuse in our body using simple diffusion ?
Answer:
No,mercury can't diffuse in our body using simple diffusion.
Explanation:
It is only slowly absorbed through the skin, although it may cause skin and eye irritation. Elemental mercury droplets may be absorbed through eye contact. Ingestion is not an important route of acute exposure as almost no elemental mercury is absorbed through the gastrointestinal tract.
A goal taking which of these lengths of time to achieve is most likely to be a
short-term goal?
A. 25 weeks
B. 25 decades
C. 25 years
D. 25 months
Answer:
A. 25 weeks
Explanation:
It's the shortest amount of time.
Hope this helps! :)
Answer:
25 weeks
Explanation:
25 minutes would probably be a short term goal. If it takes someone only 25 minutes to do, that would be a pretty short and easy goal. It COULD be 25 weeks.
Which is NOT a consequence of increased
temperatures around the world?
A. Melted glaciers
B. Flooding of coastal areas
C greater incidence of skin cancer
D melted polar ice caps
Melted glacier, increased cases of skin cancer, melted polar ice caps are the recent consequences of raised temperature around the world. thus, option" B " is correct.
What is global warming?Due to the increase of greenhouse gases like carbon dioxide, chlorofluorocarbons (CFCs), methane etc. are responsible for the Global Warming which is causing harmful effects to all organisms
The consequences of global warming leads to melting glaciers, skin cancer causing radiation, which will lead to submerging of coastal areas in near future.
Hence, option "B" is correct.
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Which of the following is not a possible pollutant?
a carbon dioxide
b. pesticides
c.fertilizer
d.all are possible pollutants
Answer:
c is the correct answer of this
Carbon dioxide is not a possible pollutants.
Which of the following is not an accessory organ of digestion?
Where is the options.........
Answer:
Uhm wheres thy options? did ya forget to put 'em
Explanation: