Answer:
In mammals (like cat and dog pets), external respiration takes place by the exchange of gases in the alveoli of the lungs
Explanation:
External respiration refers to the process of exchange of gases, i.e., oxygen (O2) and carbon dioxide (CO2), with the environment. In mammals like humans, dogs and cats, external respiration occurs in the millions of alveoli in the lungs and the capillaries that are located in the walls of the alveoli. This process (gas exchange) happens due to simple diffusion. The O2 is taken from the environment (by inhalation) and travels from the alveoli to the blood in the capillaries that surround the alveoli, while and CO2 diffuses from the blood capillaries to the alveoli (where this gas is exhaled).
NEED HELPPPPPPPPP
!!!!!!30 points!!!!!!
Answer:
Genotype Ratio: 1:4
Phenotype Ratio: 1:4
Explanation:
Tt x tt
So, it tells us that for sure the mother has 2 recessive alleles and the father has for sure at least 1 dominant allele and 1 recessive allele (we know this because the offspring can only have a recessive trait if the offspring has 2 recessives, this can only happen if the father has a dominant and a recessive allele). If you put this into the Punnett Square you should find that the probability of Tt is 50% and tt is also 50%.
this would make both the Genotype and the Phenotype 1:4
Snow owls prey on lemmings in their arctic habitat, and their survival is closely linked to the abundance of lemmings. In years when there are many lemmings, snowy owls may raise a dozen babies. How might a scarcity of lemmings affect the snowy owl population?
As you mentioned, the snow owls are linked with the lemmings. This is true of any predator-prey population model. If there aren't many lemmings (prey), then the owl population will go down. This is due to lack of food. The unlucky members will starve and die off. As the predator owl population decreases, the lemming population will go back up. This is because the lemmings aren't being eaten by the predators (as there are less owls to be eating the lemmings). Then as the lemming population goes up, so does the owl population.
As one population goes up, the other does too. This is until they reach the carrying capacity and the populations go down. This cycle repeats itself. It's quite common to find populations in flux all the time like this. Keep in mind that we're only focused on the food aspect and not other factors such as habitat. If the lemming habitat is severely compromised, then that will also affect the lemming population. To keep things relatively simple, we'll assume the habitat stays constant.
Side note: The common misconception is that lemmings jump off cliffs on purpose, and kill themselves, but this is a myth that was unfortunately spread around. Lemmings do not do this. If they did, then the species would have died off long ago.
The innate (non-specific immunity) immune system Select one:
A. is based on phagocytes and antimicrobials contained therein
B. kills bacteria according to the same principle as immunoglobulins
C. requires recognition of a surface epitope by immunoglobulins
D. None
Answer: A. is based on phagocytes and antimicrobials contained therein
Explanation:
The innate immune system a person has is the one that they were born with to help them counter all foreign organisms as it views them as threats to the immune system.
It is based on phagocytes as well as natural antimicrobials that will immediately go into action once foreign organisms are detected in the body to eliminate any threats these organisms might pose.
Look at the species name for each alien. How do you think these names were chosen?
plz answer
Complete question:
You will find the complete question in the attached files
Answer:
1)
Alienus quadlegicus: Mouth opened and no armsAlienus hairicus: Mouth opened, hairyAlienus tritoothicus: Mouth opened, not hairyAlienus stripicus: Mouth not opened, hornsAlienus bloblicus: Mouth not opened, No legsAlienus fuzzicus: Mouth not opened, Legs2) Genus Alienus
3) Morphological characteristics of aliens are used to identify them and to name them.
Explanation:
1) The dichotomous keys give you information about the groups that are being differentiated to correctly identify them. All you need to do is follow the description of the organisms and the numbers where each description drives you. If you observed correctly the organism, you will reach the scientific name, or genus, or any other taxonomic group you are looking for.
2) Taxonomy is the study of different organisms, their classification into categories according to their morphological and molecular characteristics and their evolutionary relationships. A binomial name is assigned to each organism, composed of a genus and the epithet.
Among all the categories where organisms are classified, we can find the genus, which includes many species that share some common characteristics that are used to group them together.
In this example, Alienus is the genus of all these aliens species.
3) Morphological characteristics of aliens are used to identify them and to name them.
Alienus quadlegicus: Four-legged alienAlienus hairicus: Hairy alien.Alienus tritoothicus: Alien with three teethAlienus stripicus: Alien with striped hornsAlienus bloblicus: Alien with no shape. Shapeless massAlienus fuzzicus: Short fine-haired alien.
What would happen with an increase of plants on earth?
Answer:
I don't think much would change more animals would have lot of food and we would have lot of air
why is a lagging strand not needed during protein synthesis?
Answer:
template 5'->3"
Explanation:
As we all know, with a linear chromosome, on the lagging strand (template 5'->3') of DNA replication, when the last piece of RNA primer at the 3' end is removed, the DNA cannot be extended and this creates the end replication problem.
Giving everything!!!!!!!!! Plzzzz help!!!!!!!!!!! ASAP!!
Most forms of vaccination consist of injecting a person with inactive viruses. How do the proteins from the inactive viruses protect the person from later infections by those viruses?
A. The proteins cause a mild infection that prevents the person’s body from responding to later infections.
B. The proteins bond with receptors on the cells of the person so that later active viruses cannot bind with them.
C. The proteins stimulate an immune response, which produces memory cells that can generate antibodies when new active viruses try to infect cells.
D. The proteins remain in the body and serve as a food source for later active viruses instead of feeding on the person’s tissues and causing the infection.
Answer:
C
Explanation:
Because when you get a vaccine the proteins and bacteria are working against each other so when the doctor says its normal to run a low fever thats why.
❗❗❗❗❗❗❗❗❗❗ help pls ASAP
How are fungi helpful to humans?
Question 7 options:
Can be eaten (yeast, truffles, mushrooms)
Damage crops causing corn smut, cotton root rot, wheat rust, and grain mold
Medicine (penicillin)
Both A and C
Answer:
A and C
Explanation:
they provide food and have helped with medicinal discoveries
Answer:
a c
Explanation:
What is the role of microfilaments in cell division?
Answer:
The pull the cell membrane in.
Explanation:
I took the quiz.
Please help!!!!
Can someone please give a small description on these words based off of animals cell
Golgi body
Cell membrane
Centrosome
Nucleus
Vacuole
Mitochondrion
Answer:
1.A Golgi body, also known as a Golgi apparatus, is a cell organelle that helps process and package proteins and lipid molecules, especially proteins destined to be exported from the cell.
2.The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
3.The cytocenter or centrosome is a cellular organelle that is not surrounded by a membrane; ... " centrosome- related bodies " (CRBs for centrosome- related bodies) are often seen at ectopic sites.
4.The nucleus is a membrane-bound organelle that contains genetic material (DNA) of eukaryotic organisms. As such, it serves to maintain the integrity of the cell by facilitating transcription and replication processes. It's the largest organelle inside the cell taking up about a tenth of the entire cell volume.
5.A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products.
6.power house of the cell
Explanation:
Why is the surface of the organelle so twisty?
Answer: the winding structure of the ER results in a large membrane surface area that supports its function
Explanation:
In order for a dam to work, ______ must be present.
A) a windy field
B) a lot of heat to boil water
C) a lot of fast moving water
D) oil
A 450 kg horse starts a running. If the horse is accelerating at 1.2 m/s2,
which force is closest to the net force acting on the vehicle?*
Answer:
Force of 540 Kgm/s^2 is closest to the net force acting on the vehicle.
Explanation:
Force is the change in momentum per unit time
This relationship is equivalent to product of mass and acceleration
Thus F = Mass * acceleration
Substituting the given values in above equation we get -
F = 450 Kg * 1.2 m/s^2
F = 540 Kgm/s^2
Why do plants use gravity?
Answer:
Gravity perception is important to plants because they need to send their roots downwards towards water and nutrients and their shoots upwards towards light. Plants are known to detect gravity using statelets, which are small starch-filled packets that settle at the bottom of gravity-sensing cells
Explanation:
Hope this helps.
Complete this food web by moving the organisms to the correct locations in the diagram. Arrows point in the direction that energy flows from one organism to another.
Answer:
1. Red-Tailed Hawk
2. Field Mouse
3. Bacteria
4. Grass
5. Earthworm
Explanation:
I got this question wrong multiple times in Discover Ed - Relationships among Organisms, and so I got the answers.
Sorry I couldn't phrase why, but I am 100% sure this is the right answer, and if you want further information, please go on Discover Ed.
And please please don't report me...
Thank you,
Have a great day!
What is the violent shaking of Earth's crust as built-up energy is released.
O earthquake
O epicenter
O fault
O focus
How fast the continents move?
Answer: A
Explanation:
Answer:
3-4 inches per day
Explanation:
Luís is a rock collector. He thinks that the material from his favorite sedimentary rock in his collection might have been part of an igneous rock formation under Earth’s outer layer millions of years ago. Could Luís be correct?
a.
Yes, energy from Earth’s interior can cause igneous rock to break into small rock pieces that form sedimentary rock.
b.Yes, if igneous rock is moved to Earth’s surface and exposed to energy from the sun, it could weather into small rock pieces that could form sedimentary rock.
c.No, sedimentary rock can only form out of material from other sedimentary rock. There is no way that sedimentary rock can form from material in igneous rock.
d.No, sedimentary rock forms at Earth’s surface because energy from the sun causes rock to weather, but igneous rock under Earth’s outer layer is not exposed to energy from the sun.
Answer:
i think its b) yes if igneous rock.................................
An air mass acquires the temperature and humidity of its source region.
True
False
An air mass acquires the temperature and humidity of its source region is a true statement, an air mass is a substantial volume of air that contains both temperature and humidity.
What is an air mass?As the name implies, an air mass is a substantial volume of air that contains both temperature and moisture. The temperature will change depending on where the air mass is located, for instance, the temperature will always be lower in the center of the air mass.
Similar to how air mass humidity fluctuates, air mass humidity will not change when air temperature decreases.
However, depending on the environment, it may either gain or lose water mass. Temperature and humidity may change at any time, but the pressure never does.
Therefore, air mass acquires the temperature and humidity of its source region is a true statement.
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Please answer i am not having any motivation im very tired please answer giving brainliest look at photo and answer.
Controls body movements such as walking and picking
up objects
Answer:
All of our body are controlled by the brain. One of the brain areas most involved in controlling these voluntary movements is the motor cortex.
Which of the following is an example of how culture can help humans
survive?
A. Inventing tools can help humans survive in their environment.
B. Overusing resources can make a survival practice unsustainable.
O .
C. Developing different religions can lead to conflict among
societies.
D. Having opposable thumbs helps humans grasp objects.
Answer : A
Explanation:
Inventing tools can help humans survive in their environment. Therefore, option (A) is correct.
Why inventing tools help human survive?Culture refers to the shared beliefs, values, practices, and knowledge that characterize a group or society. Humans have relied on culture to survive and thrive for thousands of years. Inventing tools is an example of how culture can help humans survive. By creating and using tools, humans are able to adapt to and manipulate their environment to meet their needs. For example, early humans used tools to hunt, gather food, and build shelters, which helped them survive in their environment.
Overusing resources can lead to unsustainability and environmental degradation, which can threaten human survival. Developing different religions can lead to conflict among societies and does not necessarily help humans survive. Having opposable thumbs is a physical adaptation that has helped humans develop complex motor skills, but it is not an example of how culture helps humans survive.
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Which of these decreases as greenhouse gas pollution increases?
A. Rate of ice-sheet melting
B. Ocean salinity
C. Ocean surface temperature
D. Sea levels
The climate-changing gases present in the atmosphere are greenhouse gases. An increase in greenhouse gas decreases the salinity of the oceans and sea. Thus, option B is correct.
What are greenhouse gases?Greenhouse gases are the major factor contributing to global warming and climate change. They are present in the atmosphere and have increased with a rise in the level of pollution.
The greenhouse gases have an inverse effect on the salinity or the thermohaline circulation. The increased temperature affects the glaciers and results in the melting of the ice caps thereby increasing the water level and surface temperature.
The increased water level and temperature increase the evaporation rate and elimination along with the circulation rate of the water from the poles and equator resulting in decreased salinity.
Therefore, the greenhouse gases decrease salinity.
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please answer quick (:
Why is the term "ectotherm" more accurate than "cold blooded" to describe the snake?
Question 3 options:
The snake's blood/body temperature is not cold, rather the snake's body temperature will match the temperature of the environment
The snake's blood/body temperature is not cold, rather the snake has warm blood
The snake's blood/body temperature stays the same, even as the temperature of the environment changes
The term "cold blooded" is more accurate than the term "ectotherm"
What are two distinguishing characteristics of mammals? Select the BEST two options.
Select 2 correct answer(s)
Question 4 options:
ALL mammals are carnivores
ALL mammals live in water
ALL mammals have hair/fur
ALL mammals feed their young with milk
ALL mammals live on land
Question 5 (0.5 points)
True or False? A female MUST lay an amniotic egg IN WATER.
Question 5 options:
True
False
Question 6 (0.5 points)
The fossil of archaeopteryx demonstrates characteristics of what TWO groups of animals? Select TWO Options.
Select 2 correct answer(s)
Question 6 options:
birds
reptiles
amphibians
mammals
arthropods
Answer:
3.answer
The snake's blood/body temperature stays the same, even as the temperature of the environment changes
4.answer
ALL mammals have hair/fur
ALL mammals feed their young with milk
5.Answer
True
6.answer
Step 1- Investigative Question
What will happen if I submerge a raw egg in vinegar for 24 hours? (Will it
bounce if I drop it or will it crack?)
Explain - Is this question testable or no? Tell me why.
What are the variables in this question?
The variables in this question are apple
The independent variable is
The dependent variable is
Answer:
Eggshells are made of calcium carbonate. If you soak an egg in vinegar the eggshell will absorb the acid and break down, or dissolve. The calcium carbonate will become carbon dioxide gas, which will go into the air.
Explanation:
It will bounce.
I believe that it is testable because you can do it at home.
Independent variable is vinegar.
The ultimate source of energy in an ecosystem is the
a. consumer
b. producer
c. sun
d. decomposer
Answer:
the sun
Explanation:
In most ecosystems, the ultimate source of all energy is the sun.
Answer:
C. Sun
Explanation:
Which of the following is NOT a function of fat in animals?
A. protection
B. energy storage
C. insulation
D. movement
Answer:
D. Movement.
Explanation:
D. Movement.
Which of the following would be a good pair of plants to use for relay intercropping?
an early sprouting, tall corn and a late climbing bean
two early spring, low-growing bush pea varieties
an early sowing of tall corn, and a late sowing of a dwarf corn
an early sowing of lettuce and a late sowing of lettuce
Answer:
two early spring, low-growing bush pea varieties
Answer:
Two early spring, lowgrowing bush pea
Explanation:
Please heeeeelp
Answer and I will give you brainiliest
19
1 point
The Endosymbiont Theory explains how the Golgi body is able to act in modifying proteins.
True
ОО
False
Answer:
Explanation:
This is true