Answer:
The presence of appropriate receptor dictates which cells will be receptive to a particular signal.
Explanation:
Some cells only respond to certain molecules because they have receptors to accept those molecules. Hence, due to this, only some molecules can be accepted by the cells.
How does a particular cell accept the molecules?Hormones are secreted by endocrine glands into the blood. The endocrine glands, such as the pituitary gland, secrete their hormones directly into the blood, but not all cells of the body can bind to the molecule and perform the cellular functions.
The cells' surface has receptors for molecules such as peptide molecules or polar hormones that can't directly enter the cell. Hence, they bind to the cell surface receptors and send signals with respect to those hormones.
A hydrophobic hormone can directly enter the cell as it can easily pass the plasma membrane. After entering the cell, it has some receptors in the nucleus or in the cytoplasm. This hormone can perform functions such as gene activation after binding with them.
Hence, after binding with receptors, they show their performance, and not every cell has the same receptors for a single molecule.
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A population of birds can have large, heavy beaks or thin, long beaks.
What can we say based on this data?
Select one:
We cannot conclude anything without having more data.
Having heavier beaks is a survival advantage.
Having longer beaks is a slight survival advantage, but having more data would help to confirm.
undo
There is no survival advantage between having heavier beaks and longer beaks.
Answer:
We cannot conclude anything without having more data.
Explanation:
All the statement says it that the birds have different types of beaks. There is no mention of information that the beak difference brings advantage or not. If the question were to say the heavy beaks survive more, then the answer would be those birds have an advantage- because it does not, the answer is we need more data
ASAP
In multicellular organisms, what do groups of cells form?
A. Prokaryotes
B. Homeostasis
C. Tissues and organs
D. Cell walls
Answer:
Letter c
Explanation:
tissues and organs
Listeriosis is of particular concern for pregnant women because pregnant women are more likely than other population groups to get listeriosis. listeriosis can cause fetal death. Listeria bacteria can cross the placenta and infect the fetus. All of the choices are correct.
Answer:
The correct answer is ''All of the choices are correct.''
Explanation:
Pregnant women are a risk group for listeriosis, the disease caused by the Listeria monocytogenes bacteria found in contaminated food. This organism can cross the placenta and affect the fetus. Due to the decrease in cellular immunity, pregnant women are part of the population at risk and are 17-20 times more likely to develop listeriosis after the consumption of contaminated food and it usually occurs from the third trimester and appears as a disease mild with not very high fever, joint and muscle pain. Listeriosis can cause miscarriages during the first three months of pregnancy. As the third trimester is reached, the mother is at greater risk. It presents a 40-50% fetal or neonatal mortality. In the first or second trimester it produces septic abortions and intrauterine fetal death, in the third trimester she produces chorioamnionitis and premature labor. In 1/3 cases it can occur asymptomatically in the fetus / neonate. In newborns, listeriosis can cause blood infections and meningitis.
Which of the following cell membranes is the most fluid?
Membrane A, because it is composed of saturated fatty acids that have one or more cis bonds that form stable aggregations
Membrane A, because it is composed of saturated fatty acids that lack weak hydrogen bonds that continually break and reform to permit macromolecule movement
Membrane B, because is it composed of unsaturated fatty acids that form weak covalent bonds at the site of their cis bonds, which permit easy movement
Membrane B, because it is composed of unsaturated fatty acids that have one or more bends, which prevent tight packing
Answer:
Membrane B, because it is composed of unsaturated fatty acids that have one or more bends, which prevent tight packing.
Each chromosome is like a package that contains numerous _____. Dna molecules. Traits. Genes. Cells. Help needed ASAP
Answer:
Each chromosome is like a package that contains numerous genes.
I hope this helps
eople that have a single allele (gene copy) for sickle cell anemia are typically not sick from the disease and are said to be carriers of sickle cell trait. These people will more often live in the malaria belt of sub-Saharan Africa. The most likely explanation for this is ________. malaria is a cause of sickle cell trait people with sickle cell trait have a better chance of surviving malaria sickle cell trait is passed on to the biting mosquitoes as malaria There is no correlation between a single allele for the pathology and the ability to survive or fight malaria.
Answer: people with sickle cell trait have a better chance of surviving malaria.
Explanation:
Malaria is a very prevalent disease in the malaria belt of Sub-Saharan Africa which includes much of western and central Africa. The people here have therefore grown to have better immunity to malaria by developing the sickle cell trait.
This has helped them survive both malaria and sickle cell anemia which doesn't affect them even though they carry the sickle cell trait.
Can someone answer both pls
Answer:
Not clear picture!!!!!!!!
What differences do insects and arachnids have?
Answer:
The main difference between the two is that arachnids have eight legs (four pairs of legs) while insects have six (three pairs of legs).Another clear difference is that arachnids don't have antennae or wings all insects, though, have antennae, and also have wings
Explanation:
HOPE IT'S HELPFUL FOR U MATE
What can you learn about by studying DNA?
Answer:
Explanation:
The study of human DNA and genetics can be intellectually fascinating, but it also has plenty of practical applications. From the use of DNA in court cases to the discovery of new therapies for genetic diseases, a thorough understanding of the human genome can have important medical, social and legal impacts.
Determine whether the following statement is true or false. If false, select the choice that will make it true. "Aerobic respiration produces Glucose."
A. True
B. False, it produces proteins.
C. False, it breaks ATP into ADP.
D. False, it produces ATP.
Answer:
D. False, it produces ATP
The statement "Aerobic respiration produces Glucose" is false. This is because it produces ATP. Thus, the correct option is D.
What is Aerobic respiration?Aerobic respiration may be defined as a chemical process in which oxygen is utilized in order to construct energy from carbon dioxide and water. This type of respiration typically takes place in the presence of oxygen to catalyze a given set of reactions.
Aerobic respiration occurs in presence of water. It takes place with help of glucose further convert into pyruvate to derive carbon dioxide, water, and energy in form of ATP. The process of aerobic respiration is also known as oxidative metabolism and cell respiration. In this process, glucose reacts with oxygen to form ATP.
Therefore, the statement "Aerobic respiration produces Glucose" is false. This is because it produces ATP along with carbon dioxide and water. Thus, the correct option is D.
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what type of energy transfer happens when something freezes
Which of the following products is an example of innovation and technology in plant science?
A prepotted herb garden
A potted fern
The use of GPS data
USDA hardiness zones
Explanation:
A prepotted herb garden is the answer
hope this helps you
have a nice day:)
The molecules of water move farther apart in the water cycle and water changes from the?
Explanation:
I think the ans is evaporation
what is photosynthesis???
the process green plant taking food from sun light is called photosynthetis
Answer:
Photosynthesis is a process through which plants and other organisms transform light energy into chemical energy, which is then released to power the organism's metabolic processes through cellular respiration.
~OAmalOHopeO
In the scientific process, what is the correct sequence for the following steps: A: Recognizing a problem/Asking a question; B) Testing a hypothesis; C Drawing inferences
Group of answer choices
ABC
ACB
CAB
BCA
Answer:
ABC
Explanation:
Ask questions, make a hypothesis, test the hypothesis, analyze results, draw conclusions, communicate results.
PLEALES HELP NOW!
Which of the following is the best example of potential energy?
A baseball player hitting the ball
A horse trotting in an open field
A noodle cooking in boiling water
A runner positioned at the start line
Answer:a runner positioned at the start line...
The consensus is that the coelacanths and lungfishes (Sarcopterygii) represent an evolutionary link between ray-finned fishes and tetrapods. What is the major feature in the Sarcopterygii that supports this hypothesis?
Answer:
Choana, paired fins with a fleshy base over a bony skeleton, persisting notochord, 2 dorsal fins and nares.
Explanation:
Sarcopterygii also known as lobe-finned fishes which usually possess a choana, paired fins with a fleshy base over a bony skeleton, persisting notochord, 2 dorsal fins and nares are present internally. The lungfishes are considered the closest living relatives of tetrapods because of the presence of some common features. The African lungfish has epithelial crypts located at the base of the lamellae of the olfactory epithelium that express markers of the vomeronasal receptors in tetrapods.
Each allele for a gene is found on a separate _____________.
A. gene
B. heterozygous chromosome
C. homologous chromosome
D. nucleus
Answer:
Homologous chromosome
Explanation:
As compared to the circulatory system of most fishes, the circulatory system of adult amphibians has the advantage of a single circuit. partially-separate circuits for gas exchange and systemic delivery of blood. complete separation between oxygenated and deoxygenated blood. a four-chambered heart. a pocket of the gut that serves as an air bladder.
Answer:
Partially separate circuits for gas exchange and systemic delivery of blood.
Explanation:
Adult amphibians have separate circuits for gas exchange and systemic delivery of blood. Fishes usually breathe through gills and very few have nostrils. The fishes can breathe underwater with the help of their gills.
Which best describes a difference between transcription and DNA
replication?
Answer:
DNA replication involves synthesis of DNA molecules, while transcription is a process that involves synthesis of RNA molecules. In both processes, DNA acts as template and provides information for synthesis of new daughter DNA or RNA strand.
Explanation:
Hemophilia is a sex-linked genetic disorder that inhibits the blood’s ability to clot properly. Is the gene that causes hemophilia recessive or dominant?
Answer:
The gene that causes haemophilia is recessive.
Answer:
It’s recessive. The mother who is a carrier is heterozygous, but she does not have the disease. The only offspring who have the disease are the boys who inherited one mutated gene.
Explanation:
edmentum
What adaptation do seeds dispersed through ballistochory have?
a)
sail-like structure
b)
smooth and aerodynamic
c)
hollow on the inside
d)
pleasant smell and taste
Answer:
smooth and aerodynamic
Explanation:
Seeds are usually smooth, like a baseball, so that they cut smoothly through the air and don't have a lot of wind resistance.
The adaptation that seeds dispersed through ballistochory has smooth and aerodynamic. The correct option is b.
What are adaptations?Adaptation is a biological process that is done by many plants and animals to survive in given conditions. Adaptation is causing the partial or full change in their body or functions to match with the environmental conditions.
Plants with ballistochory means possibly ejects by the seeds full stop this adaptation or evolution happened in which seats are dispersed into many tentacles and seats are dispersed into soils for pollination this comes under wind dispersion.
Seeds launch an angle and release the elastic energy store in the fruit. These adaptations are smooth.
Therefore, the correct option is b. smooth and aerodynamic
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Human Population Growth and Overpopulation
Can someone please help me I don't understand what I have to do.
Answer:
all you're trying to do is create a histogram of what has happened in the past and what could happen in the future.
Explanation:
for example and AD you feel the first little bar because it's not more than a billion and its last therefore it would be the zero billion
and then for 1850 you feel to bars because they had 1 billion people so therefore you feel the 0 billion and the 1 billion part
Which of the following species is Endemic?
A. Geese on the East coast of the US
B. African elephants at the zoo
C. Invading Japanese beetles found eating crops in North American farms
D. Lemurs isolated to the island of Madagascar
Answer:
D. Lemurs isolated to the island of Madagascar
Explanation:
Endemic is to be native and restricted to a certain place.
Endemic species are organisms that are limited and confined to a particular region. Lemurs show endemism as they are isolated to the island of Madagascar. Thus, option D is correct.
What is Endemism?Endemism is a biological term used to depict the distribution of the organism in an area that becomes its habitat. It is shown by species that are limited and bounded to one geographical location.
Endemism is shown by the species due to genetic isolation that separates the population or the species in a geographical area and does not allow the genetic material to exchange by reproduction.
Koalas and Kangaroos in Australia, Lemurs in Madagascar, lion-tail macaque and Nilgiri blue Robin in India, and camellia plant in Japan are some endemic species.
Therefore, option D. the Lemurs in Madagascar are an example of endemic species.
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pls help ill give brainlist!!!!!!!!!
Answer:
Explanation:
Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).
A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance
Lysosomes function as the digestive system of the cell, serving both to degrade material taken up from outside the cell and to digest obsolete components of the cell itself
Centrioles play a role in organizing microtubules that serve as the cell's skeletal system. They help determine the locations of the nucleus and other organelles within the cell.
The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.
The cytoplasm is responsible for holding the components of the cell and protects them from damage. It stores the molecules required for cellular processes and is also responsible for giving the cell its shape.
The organisms native to an area will impact the types of soil found in that area.
Please select the best answer from the choices provided
T
F
HELP ASAP
A sealed Ecosphere is able to perpetually sustain life until what happens?
Answer:Oxygen is DEPLETED
Explanation:
HELP ME PLEASE FASST
Which of the following describes a scenario that could increase the winds of the jet stream?
O Faster global convection currents
O Decreasing radiation from the sun
O Equal heating of the Earth's surface
O Stopping conduction from the ground
Answer:
faster global convection currents!
Fortunately I just took this quiz and received 100%!
The statement that explains scenerio that can bring an increase to winds of the jet stream is A: Faster global convection currents.
Jet streams can be regarded as a fast flowing as well as narrow and meandering, air currents which is found on Earth and other planet. It is a bands of strong wind which moves to east from west in the globe.The wind of jet stream do increase by the action of wind current, because convection current do aid the movement of this this wind from a place to the otherTherefore, option A is correct.
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When does facilitated diffusion occur
Answer:
Facilitated diffusion takes place due to a difference in concentration on both sides of the membrane, in the direction of the lowest concentration, and does not require energy.
What can differentiate between multiple layers of the ocean floor?
sonar
magnetic imaging
x-ray
seismic reflection
Explanation:
seismic reflection is the answer
