As an animal ages and its hair turns white, the medulla becomes filled with
A. water.
B. melanin.
C. air.
D. fat.
Answer:
B. melanin.Explanation:
Melanin is a type of pigment that make our hairs coloured. When ages past, this pigment is produced in minor quantities, that's why we lost that natural colour in our hair.
The specialized tissue in the root that functions in food storage is the
Describe the pathway of sound from the point where it enters the outer ear to the point in which the sound information travels to the brain. Briefly describe the structure and function of each organ along the pathway.
@ColdStare
while you first pay attention to a legitimate, it travels to the auricle which is likewise referred to as the pinnae. that is the part of the ear you can see you the human eye. It then moves through the ear canal, till it reached the tympanic membrane (additionally known as the eardrum). When it reaches the eardrum the noise begins to vibrate. Then alerting the 3 tiny bones inside your inner ear called the ossicles. those bones have names of routes. they are referred to as the malleus (which is called the hammer), incus (that is referred to as the anvil), and stirrup (which is referred to as the stapes). when the ossicles flow the fluid inside the cochlea, the tiny hair that is in our ears (I recognize gross right) then we could the mind know. The system seems lengthy but happens so speedily within our frame.
what is the precise pathway for sound to the brain?The auditory pathway starts at the cochlear nucleus, then the advanced olivary complex, then the inferior colliculus, and finally the medial geniculate nucleus. The information is decoded and incorporated through every relay nucleus inside the pathway and subsequently projected to the auditory cortex.
What are the 2 sound pathways for hearing?
Auditory messages are conveyed to the mind thru types of pathway: the number one auditory pathway which exclusively carries messages from the cochlea, and the non-primary pathway (also referred to as the reticular sensory pathway) which contains all kinds of sensory messages.
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For their summer holiday, Jane and her family are visiting places surrounding the Mediterranean Sea. Which type of biome is Jane and her family visiting? rainforest shrubland tundra coniferous forest
The correct answer is Shrubland.
Jane and her family is going to visit shrubland biome. This biome generally get more than land than the desert and the grasslands but the rainfall is less than forested area. Some places that are found surrounding the Mediterranean Sea is California, Mexico, Chile, et cetera.
In an attempt to deal with his severe, untreatable epileptic seizures, h.m. had portions of his _____, including the brain structure called the _____ surgically removed.
How does mitosis in plant cells differ from that in animal cells? A. Plant cells lack a cell membrane. B. Plant cells lack spindle fibers. C. Animal cells lack a cell plate. D. Animal cells lack cytokinesis
Plant cells have cell walls and chloroplasts, while animal cells lack these structures. Plant cells form a cell plate during mitosis, while animal cells do not.
Explanation:Plant cells and animal cells have several differences when it comes to mitosis. One major difference is that plant cells have a cell wall, while animal cells do not. This means that during mitosis, plant cells form a cell plate, which eventually becomes a new cell wall, while animal cells do not have this structure.
Another difference is that plant cells have chloroplasts, which are responsible for photosynthesis, while animal cells do not. Additionally, plant cells have plasmodesmata, which are channels that allow for communication between neighboring cells, while animal cells lack this structure.
What nursing action is essential when a client experiences hemianopsia as the result of a left ischemic stroke?
What is meant by the following statement about the cell membrane? The cell membrane is said to be semipermeable.
The cell membrane or a plasma membrane is a semipermeable membrane which means that this is a layer that allows only certain molecules that can pass through it. This allows the cells to keep their materials and the contents parted from the environment and from the other cells. This also makes the phospholipid bilayer an outstanding semipermeable membrane and protects the intracellular organelles from the environment that is outside from the cell.
PLEASE ASAP suppose you use a microscope to look at a cell from the skin of a onion. What structure will you see that would not be found in a cell from your skin? A. Endoplasmic reticulum B. Golgi Apparatus C.Cell wall D. Plasma membrane
What is the term for the layers of bony matrix surrounding the cell at a?
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Though they are constantly changing, ecosystems are naturally _____.
consistent
crowded
species-rich
balanced
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Which often results from great variations in a habitat’s abiotic conditions?
increased moisture
more niches
fewer organisms
lower temperatures
What would you expect to see in a blood sample of a person who has drowned in salt water? Explain in terms of osmosis.
All of the organisms in the Kingdom Planta, except mosses, are vascular.
Which description is common to all organisms in the Kingdom Planta?
A.
produce pollen
B.
have stamens and pistils
C.
produce cones
D.
use photosynthesis to get nutrients
Answer:
It's use photosynthesis to get nutrients.
Explanation:
So the answer is D.
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Which statement is not true of grasses?
They are similar to succulents.
They are resistant to extreme temperature.
They include grains.
They are the most widely distributed flowering plant
In biology class one day, Mrs. Chabon wrote six physiological functions on the board. Then, she asked groups of students to each choose the three functions that are purposes of the excretory system. These are the lists they made. Group 1: maintaining pH level of blood; transporting hormones throughout the body; regulating growth Group 2: removing wastes from the body; digesting solid foods; maintaining salt and water balance Group 3: maintaining salt and water balance; maintaining pH level of blood; regulating growth Group 4: removing wastes from the body; maintaining pH level of blood; maintaining salt and water balance Which group correctly listed the functions of the excretory system? group 1 group 2 group 3 group 4
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The desert fennec is a small fox that lives in the Sahara Desert. It has long limbs and long ears.
Compared to the desert fennec, you might expect the Arctic fox to have _____.
shorter fur
larger eyes
longer legs
shorter ears
Answer:
shorter ears
Explanation:
The main goal of cellular respiration is the production of ___ molecules.
Which statement accurately describes DNA?
A. DNA is found on genes.
B. DNA is replicated by mRNA.
C. DNA is a molecule that contains genes.
D. DNA is a molecule made up of chromosomes.
Because homeostasis is vital for survival, _______ mechanisms have evolved that maintain a stable internal environment.
To maintain homeostasis, redundant mechanisms are present in the body so that when one of the systems fails, other complementary or backup systems can help to compensate and ensure the survive of the organism by maintaining homeostasis. Examples of these redundant systems involve blood pressure regulation, temperature regulation, breathing and pH control in the body during exercise.
How does a growing embryo inside a seed obtain food?
1) It uses food stored within the seed.
2) It undergoes photosynthesis to make its own food.
3) It absorbs food from the outside environment.
4) It takes in food provided by the seed coat.
Answer:
1) it uses food stored within the seed.
Explanation:
just got it right...
A developing embryo inside a seed uses food stored inside the seed to gain nutrition. So, the correct option is A.
What is an Embryo?The embryo is created shortly after fertilization when the zygote divides multiple times in accordance with the patterns unique to each species. An embryo with differentiated radicle, plumule, and cotyledons is enclosed in the seed coat.
The plumule produces the aerial shoot, whereas the radicle, when it becomes longer, produces the major root. There may be one cotyledon (monocotyledons) or two cotyledons (as in dicotyledons).
Sometimes they act as food reserves, storing grains, peas, almonds, cashews, and other foods, or they act as photosynthetic cells in immature seedlings. The hypocotyl is the portion of an embryonic axis that lies between both the radicle and the cotyledon's attachment point. In a similar vein, the region of a embryonic axis between both the plumule as well as the point of attachment of cotyledons is called epicotyl.
Thus, the correct option is A.
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which of the following is extrusive?
Magma
Lava
Laccolith
Batholith
Answer:
Lava
Explanation:
Extrusive igneous rocks form when magma reaches the Earth's surface a volcano and cools quickly. Most extrusive (volcanic) rocks have small crystals. Examples include basalt, rhyolite, andesite, and obsidian.
What were some of the earliest forms of life on Earth?
Answer:
The first life forms were (3.8 to 2.5 billion years ago), the Archean Period and the world's landmasses began to form in the Archean Period. Earth's initial life forms were bacteria, which could survive in the highly toxic atmosphere that existed during this time.
Explanation:
Right on ED2021 practice, goodluck!
Microbes, the earliest known life forms, left traces of their existence in rocks that were 3.7 billion years old.
What are microbes?Microbes are extremely minute living entities that are all around us and are invisible to the unaided eye.
They are aquatic, terrestrial, and avian organisms. Millions of these bacteria, which are also referred to as microorganisms, reside in the human body. While certain microorganisms make us ill, others are vital to our wellbeing.
A microorganism, often known as a microbe, is technically a tiny organism. The term "microbiology" refers to the study of microorganisms.
Bacteria, fungus, archaea, and protists are all types of microorganisms. Prions and viruses are not considered microbes because they are considered non-living in general.
The earliest known life forms, microbes, left behind signs of their presence in 3.7 billion year-old rocks.
Thus, microbes are some of the earliest forms of life on Earth.
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In any food web, which organism has the least available energy?
A.birds
B plants or producer
C fungi or decomposers
D animals or carnivores
Answer:
d
Explanation:
Schizophrenia is a disorder that is most often treated _______.
a. over an extended period of time
b. over a short period of time
c. only in its acute phase
d. primarily by the use of psychotherapy
Schizophrenia is most often treated: a. over an extended period of time
Schizophrenia can be described as a chronic mental health disorder which is usually complex and is characterized by delusions, disorganized speech and behavior, impaired cognitive ability and hallucinations.
Serious of treatment can be employed, which involves medications and psychotherapy. Generally, the treatment of schizophrenia takes no shorter than 6 years. It can extend to long period of time.
Therefore, Schizophrenia is most often treated: a. over an extended period of time
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While mRNA strands are being created a sequence is sometimes miscopied. What is the best possible outcome, the worst possible outcome and the long-term effect on the cell if mRNA strands were miscopied?
Your textbook describes a field experiment using guppies that was conducted to test natural selection. complete the sentences about this experiment with the correct terms.
John Endler's field experiment with Trinidad guppies demonstrated how selection pressure and genetic variability drive natural selection in guppy populations. The shift in guppy coloration in different environments highlights the tradeoff between sexual selection and predation risk. These factors all play a role in the stability of guppy populations and ecosystems.
Explanation:The guppy field experiment conducted by John Endler in Trinidad serves as a strong example of selection pressure affecting genetic variability and natural selection. By relocating drab-colored guppies from an area with predators (area 3) to an area without predators (area 1), it was observed that, over time, these guppies developed brighter colors. This change suggests that genetic variability did exist in the original guppy population, as there were alleles present for both bright and drab coloration traits. The presence of predators in the original habitat (area 3) creates selection pressure for more camouflaged, drab colors to avoid predation, whereas, in the absence of predators (area 1 after relocation), sexual selection favored brighter colors which are more attractive to female guppies.
If guppies from a predator-free environment (area 2) were moved back to the predator-filled environment (area 3), it can be predicted that over time, the bright colors would diminish as predators would more easily catch the more conspicuous guppies. Furthermore, if female preferences shifted from coloration to size, we would expect the selective pressure to shift accordingly, and larger fish, regardless of their color, would become more prevalent in the population. This sort of selective breeding would also affect the stability of the guppy population and potentially the ecosystem, as different traits become advantageous or disadvantageous depending on the environment and predation pressure.
Which of the following plants do NOT have swimming sperm?
ginkgos
cycads
both a and b
none of the above
Answer:
None of these.
Explanation: The plants like cycads and ginkgos have swimming sperms. they need water to complete their life cycle.
There are many adaptations seen in the plants like liveworts, ferns and mosses in which they require water to complete its life cycle. This adaptation is not only restricted upto cyptograms. This can also be seen in the plants like ginkgos and cycads. Their sperms are very strange.
What can you conclude if the protein with an apparent mass of 45 kda is not detected in individuals who lack the dominant allele? that protein is probably coded for by the recessive allele that protein is probably coded for by the dominant allele that protein is probably expressed only when the recessive and dominant alleles are both present?
For many species living in variable environments, sexual reproduction has proven to be a better solution for reproduction than asexual reproduction because sexual reproduction ______________ .