Within certain synovial joints, the fibrocartilaginous pads that cushion and guide the articulating bones are called ________________________.

Answer:

The plasma membrane, also called the cell membrane or phospholipid bilayer, is the sack that surrounds cells. ... The plasma membrane maintains homeostasis in the cell by keeping cell contents in and foreign material out, and by providing controlled avenues for the transportation of fuel, fluids and waste

Answer:

In mine own answer, I think light is a source people use to see in the dark or for other reasons it's like something we need in life. Without light how would we live? Where does light come from? I feel like people ask this most of the time. How do we know what light is? All we probably know is that it's a source of light coming from some sort of powerful energy. So basically, light is a type of electromagnetic radiation that allows people to see more clearly in the dark.

Explanation:

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Commensalism relationship is shown between cattle egret and cattle.

Usually cattle egrets follow herds of large hoofed mammals such as cattle, buffalo. They eat the insects that have been stirred up by the buffalo as they move. This relationship is commensalism, because the birds benefit but the ungulate is neither harmed nor helped.

The cattle egret and grazing cattle in a close association is a classic example of commensalism. It is a common sight in rural areas where one can see ticks hovering over the cattle. They feed on cattle's blood and hence are harmful to them as they can transmit several diseases. The cattle egret and grazing cattle in a close association is a classic example of commensalism. It is a common sight in rural areas where one can see ticks hovering over the cattle. They feed on cattle's blood and hence are harmful to them as they can transmit several diseases.

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Answer:

Human heart rate in normal condition is between 70-100 bpm, but this number increases dramatically for Daphnia (260 bpm). This major difference can indicate chemicals may have different effects on the heart rate of different organisms.

Explanation:

Commonly the place where a population lives is described was a habitat, forming a biological community, however there is not an option with that term, but between the present terms the one that is closer to a term for the area where a population lives is D. Geographic Distribution, since all the other alternatives are related to different factors of ecological studies.

The addition of mitosis-promoting factor (MPF) to germinal cells in the skin arrested in G2 would lead to the initiation of mitosis and progression through the cell cycle.

Mitosis-promoting factor (MPF) is a complex of proteins that plays a key role in promoting the progression of cells through the cell cycle, specifically from the G2 phase to the M phase (mitosis).

When germinal cells in the skin are arrested in G2, it means that they have temporarily halted their cell cycle progression and are not actively dividing.

Adding MPF to these arrested cells, would activate the necessary signaling pathways to trigger the initiation of mitosis and allow the cells to proceed through the cell cycle.

MPF helps to overcome the checkpoints and regulatory mechanisms that keep cells arrested in specific phases of the cell cycle. It phosphorylates various target proteins, leading to the breakdown of the nuclear envelope, the condensation of chromosomes, and the formation of the mitotic spindle, ultimately resulting in cell division.

Therefore, the addition of MPF to germinal cells arrested in G2 would stimulate their entry into mitosis and enable them to resume the cell cycle progression. This process is crucial for the generation of new skin cells and the maintenance of tissue homeostasis.

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Answer:

D

Explanation:

Arthropods have book lungs, gills, and air tubes but they don't have lungs

Answer:

A. Hard

D. 10 days to 8 weeks

D. 5-7 days

A. 10-15 days

Explanation:

By the end of the 2nd trimester, the baby's skeleton is hard. This means that the bones have developed to a point where they can be seen on an X-ray.

The baby is called an embryo from 10 days to 8 weeks after fertilization. During this time, the embryo is undergoing critical development of its major organs and structures.

The blastula or blastocyst stage occurs from 5-7 days after fertilization. This stage is characterized by the formation of a fluid-filled cavity called the blastocoel, which will eventually become the embryo's digestive system.

The morula stage occurs from 0-4 days after fertilization and is characterized by a solid ball of cells that will eventually develop into the blastula.

The placenta begins to form around 10-15 days after fertilization. This structure serves as a vital connection between the mother and developing embryo/fetus, providing nutrients and oxygen while removing waste products.

Answer:

Both parents were heterozygous for black fur.

The flu and the cold are diseases that usually present in mild symptoms, but to be able to say why we can catch them more than once, we need to know that.....

Influenza, is a viral infection of the respiratory system. It is caused by the Influenza virus, which can be type A or B. It is mainly characterized by a picture of symptoms that leaves the person feeling very down and tired, causing a lot of discomfort.

Cold is and how it differs from the flu. To begin with, it is worth noting that it is also a viral respiratory infection. The difference between a cold and the flu is that it can be caused by other types of viruses, such as the more frequent Rhinovirus and Parainfluenza.

The good news is: no, you can't. The bad news is, there are a lot of viruses and germs flying around this time of year, and instead of catching the same one, you have a high chance of catching another.  

The body's immune system recognizes and fights off germs, such as viruses that have invaded your blood, the viruses that cause the flu can change each year, so even if you've had the flu recently, it's recommended that you get a vaccine that matches the new viruses that may be circulating each year.  Because the flu is caused by several viruses, the immunity you naturally develop after infection will only protect you against that type, so you can catch it from another one as well.

With this information, we can conclude that, we can have flu and cold more than once, because we will be in contact with many viruses that cause the flu and the cold.

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Answer:

The cell membrane is selectively permeable . It lets some substances pass through rapidly and some substances pass through more slowly, but prevents other substances passing through it at all. Some small molecules such as water, oxygen and carbon dioxide can pass directly through the phospholipids in the cell membrane

Answer:

Microtubules have shapes like a spindle and are arranged to form centrosome and a cluster of such microtubules form centriole.

Explanation:

Microtubules are seen in eukaryotic cells to give shape and structure to the cells and they form part of the cytoskeleton. They are known to grow long and are dynamic. Centrosomes are known to be main microtubule that are found in animal cells. They are organelles that are made from the arrangement of clusters of microtubules. The centrioles are organized microtubules that actually help to serve as skeletal system of the cell. These centrioles  help to determine the locations of the nucleus.

Answer:

The complementary DNA strand is:

Explanation:

GCTAGGAAG

According to studies, the development of fingerprints is influenced by both hereditary and environmental variables.

The patterns of skin ridges (referred to as dermatoglyphs) on the pads of the fingers serve as the basis for a person's fingerprints. The soles of the feet, the palms of the hands, and the toes all have these ridges. Although the whorl, arch, and loop patterns are identical in their core, each person's pattern details are unique. There aren't many genes known to play a role in dermatoglyph development. Dermatoglyphs that are aberrant or absent in rare disorders can offer some insight into their genetic origins.

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Answer:

yes you are correct

Explanation:

can i have brainliest please

Answer:

yes the answer is D through erosion and then pressure and cementation

When we say that an organism is haploid, we mean that its cells have a single set of chromosomes. So the correct answer is C.

Haploid organisms have half the number of chromosomes as diploid organisms, which have two sets of chromosomes (one from each parent). Haploid cells are typically found in the reproductive organs of organisms, such as sperm and egg cells in animals or pollen and ovules in plants. During sexual reproduction, haploid cells from two different individuals combine to form a diploid zygote, which then develops into a new organism. Options A, B, and E are incorrect because they refer to variations of having only one chromosome or only a part of one chromosome, Option D is incorrect because it describes a diploid organism.

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Answer:

prions doesn't consist of cells.

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Answer:

the answer is A:aorta

Explanation:

I took the k12 quiz and got 100%

Answer:

It should be C. inner ear

Explanation:

according to the web

Answer:

The sodium-potassium pump is an active transporter because it needs to move sodium and potassium ions against the concentration gradient.

Explanation:

You have to think of it as outside vs inside the cell.

Outside the cell, you have 5mM K and 150mM Na. Inside the cell, you have 100mM K and 10mM sodium. Without the transporter then the ions would go from greater concentration to lower concentration.  Energy keeps the ions going from the way they would naturally happen.

All the members of a single species that occupy a particular area at the same time are known as a Population.

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Around 3.8 billion years ago, near the conclusion of this phase known as the late heavy bombardment, life on Earth first emerged, hence option A is correct.

Even before the 3.5 billion years ago when the oldest fossils on Earth were discovered, just at the conclusion of the time of late intense bombardment, there is evidence of biological activity.

The 3.5 billion-year-old "stromatolites," which are hard structures created by bacteria, also provide evidence of their presence. Stromatolites are produced when microbe-made sticky mats catch and organize sediments into layers.

It has been discovered that trophozoites contain organic material from 3.5 billion years ago. 3.5 billion-year-old rocks have been found to contain microbial remnants, some of the planet's earliest evidence of life.

Therefore, 3.8 billion years ago, near the conclusion of this phase known as the late heavy bombardment, life on Earth first emerged, hence option A is correct.

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Answer:the independent variable is the variable that won’t be artificially changed

Explanation:

for example, if you experiment about how tall a plant will grow by using different solutions, the dependent variable the the solution, the independent variable is the plant height

Answer:

They are all living organisms

Explanation:

A cactus, a house fly, and the grandmother all are living organisms. All the things show characteristics such as growth, metabolism, reproduction, etc. Thus, all can be considered as living things.

A living organism is composed of different types of cells. The cell is the basic unit of life. These cells divide, and the body of the organisms show growth due to the increase in the number of these cells.

A cactus, a house fly, and the grandmother all are living organisms and show the defining properties of living things. These properties include growth, metabolism, and reproduction.

All the organisms grow with time as the cells undergo division and show metabolism as the cells undergo different reactions such as respiration, etc. All these organisms reproduce to form new organisms which are similar to themselves through the process of sexual and asexual modes of reproduction.

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Based on the study of primate ancestors and their morphology, it is generally inferred that the ancestral state for primates had three premolars and a basic ear structure.

How many premolars were present in primates?

Three premolars were present in primates. This is because most primates, both living and extinct, have three premolars, and the basic ear structure is seen in many early primate fossils. However, it is important to note that there may have been some variations in the number of premolars and ear morphology among early primates, and further research is needed to fully understand the ancestral state.

We can infer that the ancestral state for primates likely had a higher number of premolars compared to modern primates, as early primates had more teeth in general. In terms of ear morphology, the ancestral state for primates probably had a less developed outer and middle ear, as these features have evolved over time to improve hearing capabilities in the diverse environments primates occupy.

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Answer: During muscle contractions, myosin motor proteins move across tracks of actin filaments.

Answer:

It is C because lactose has a glucose molecule and a galactose molecule.

Answer:

Burning fossil fuels, manufacturing, oil refineries, electricity generation, and vehicles

Explanation:

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Answer:

enzyme

Explanation:

Enzymes are a type of protein.

Answer:

Enzyme

Explanation:

A person who suffers from phenylketonuria (PKU) is unable to process phenylalanine because of a dysfunctional enzyme, a protein that is encoded by their DNA.