"Babies born to HIV-infected mothers can be infected but asymptomatic." This is true. Therefore, option (3) is correct.
Some babies born to HIV-positive moms will contract HIV. Medical care can lower the risk of mother-to-child HIV transmission. The illness can worsen in asymptomatic newborns. HIV is transmitted by body fluids, not fertilisation.
Breastfeeding can transmit HIV, however antiretroviral medication for mum and baby and alternate feeding practises can reduce the risk. Proper medical care and prevention help prevent HIV transmission from moms to their children. Therefore, option (3) is correct.
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Your question is incomplete but your full question was:
Which of the following statements is true of babies born to HIV-infected mothers?
Babies can contract HIV during sperm/egg adhesion in the fertilization process.All babies born to HIV-infected mothers are infected with HIV.Babies born to HIV-infected mothers can be infected but asymptomatic.Babies seldom contract HIV through breast feeding by an infected mother.Need help with this ready to eat foods includes
Answer:
the answer is A
Explanation:
Which level of cellular organization is the most complex?
A.cells
B.organelles
C.organs
D.tissues
The most complex cellular organization is actually the organisms but since its not on the choices its the organs.
The most complex level of organization is the organ level. Details about level of organization can be found below.
What is level of organization?The level of organization of life refers to the hierarchical arrangement of the components that make up life.
The level of organization is from the most simple level to the most complex level as follows:
OrganellesCellsTissuesOrgansSystemsOrganismThis means that the most simple is organelles and the most complex is organism.
Therefore, the most complex level of organization in the options is the organ level.
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1.
Which organelle is present in the cells of a mouse but not
present in the cells of a bean plant?
A. cell wall
B.
chloroplast
C. cell membrane
D. centriole
Answer: Centriole
Explanation:
Centriole is the only cell organelle which is found in the animals cell but not in plant cell. The centriole is a cylindrical organelle which is composed mainly of the protein known as tubulin.
They are mostly found in the eukaryotic cells. It is absent in the plant cell.The centrioles are very important for the cell division and they produce microtubules which gets separated into two identical cells.
Hence, the correct answer is option D
The cell organelle that is present in the cells of a mouse but not in the cells of a bean plant would be the centriole. The correct option would be D.
Plant cells such as the ones in a bean plant have cell wall, chloroplast, and cell membrane. However, centrioles are only found in animals cells.
Centrioles in animal cells such as the one in a mouse functions as the basal bodies of spindle fiber, cilia, and flagella from which the spindle apparatus springs from during mitotic cell division. The spindle apparatus helps to organize microtubules during the mitotic process.
Plant cells have rigid cell walls that can organize microtubules during mitotic divisions. Hence, centrioles are not needed.
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What was the benefit of crop rotation?
A. More land was needed to plant crops.
B. Different crops could be grown on the same land.
C. Crops could be separated into different fields.
D. Land could remain unplanted for long periods of time.
Answer:
B. Different crops could be grown on the same land.
Explanation:
Crop rotation is the process of growing different plants in the same land according to the season. Various kinds of plants require various sorts of supplements from the soil.
Changing crops on a regular basis enables the land to stay rich in nutrients, since not the majority of similar nutrients are being utilized each season. Crop rotation likewise fights against the powers of soil erosion. It also helps to improve the stability of the soil by shifting back and forth between harvests with profound roots and those with shallow roots.
what is the correct MLA format for a works-cited page entry for a magazine article?
Explanation:
First do the Last, First, Then middle names of the author(s). Then the title of the article, then magazine. after that the date it was published and finally the page number the information was found on. example: Last, First Middle "title of article" title of magazine
Which series correctly lists the eight taxonomic levels in order, from the broadest group to the most specific group?
species, genus, family, order, class, phylum, kingdom, domain
domain, kingdom, phylum, class, order, family, genus, species
species, genus, family, class, order, phylum, kingdom, domain
domain, kingdom phylum, order, class, family, genus, species
Answer:
B. domain, kingdom, phylum, class, order, family, genus, species
Explanation:
Answer:
Yes, the answer is B
Explanation:
I had this on a bio test and got this question correct
Which organ is part of the Integumentary system?
lungs
skin
stomach
heart
Answer: Skin
Explanation: The Integumentary system is made up of the skin, hair, nails, and exocrine glands. The only option within this list is skin and the answer is therefore skin.
What is the relationship between the chemical reaction for photosynthesis and the chemical reaction for respiration
Answer:
Photosynthesis and respiration are reactions that complement each other in the environment. They are in reality the same reactions but occurring in reverse. While in photosynthesis carbon dioxide and water yield glucose and oxygen, through the respiration
Explanation:
Answer:
in photosynthesis carbon dioxide and water yield glucose and oxygen, through the respiration
Explanation: please give brainliest
(EASY) answer the question below!
Answer:
Photosynthesis!
Explanation:
This process uses carbon dioxide, or CO2, to create sugar, which is energy!
Answer:
C) photosynthesis is the process by which producers in an ecosystem convert light energy into chemical energy
What atom is a carbon atom?
Please help ASAP will give brainliest
Answer:
B
Explanation:
The carbon atom has 6 electrons. 4 of which are valence electrons.
Answer: b
Explanation: there is four on the outer layer than middle later consist of 2 on the inside!
why does biomagnification has a larger impact on organisms at the top of
the food chain.
Answer:
Biomagnifications largely affects the organisms at the highest trophic level.
Explanation:
The increase in concentration of toxic chemicals while moving up in a food chain is called biomagnification. What starts out as a small concentration at the lowest trophic level turns out to become a higher concentration at higher trophic levels.
Thus it is the organisms at the highest trophic level that are the most affected. This accumulation occurs because the organisms have not evolved enough to posess mechanisms that facilitate detoxification of various substances.
Such substances are called novel substances and DDT is an example. Removal of substances like metals is also difficult. Thus a harmful chemical component travels up various trophic levels increasing in concentration at each trophic level.
Final answer:
Biomagnification results in higher concentrations of toxins in apex predators because they accumulate all the toxins present in the organisms they consume at lower trophic levels.
Explanation:
Biomagnification refers to the increasing concentration of persistent, toxic substances in organisms at each successive trophic level within a food chain. This phenomenon occurs because the toxins accumulate in the bodies of organisms, and when these organisms are consumed by predators, the toxins are transferred and magnify in concentration.
Notably, at the apex of the food chain, organisms such as swordfish have a higher concentration of toxins like mercury because they have ingested all the toxins accumulated in the bodies of organisms at lower trophic levels over time. Consumers of these top predators, including humans who consume fish like tuna or swordfish, consequently face a greater risk of toxic exposure due to the high levels of mercury and other persistent substances that have biomagnified through the food chain.
"Which is a characteristic of atoms?
They come in ten major types.
They are the smallest units of matter,
They can be divided,
They cannot combine together,
they are the smallest units of matter bebe:)
Answer:
The correct answer is- They are the smallest units of matter,.
Explanation:
Atoms are the smallest unit of which a matter composed of. Protons, neutrons, and electrons are present in an atom. Protons and neutrons together make the nucleus of the atom.
Protons are positively charged particles and neutrons are neutral therefore nucleus is having a positive charge due to the protons present in it. Electrons are negatively charged particles that revolve around the nucleus.
The electromagnetic force is generated between the negative charge of electrons and the positive charge of the nucleus which helps the atom to stay together in the matter.
Therefore, the correct answer is atoms are the smallest units of matter.
Select all that apply. What are the nutrients needed for good health?
carbohydrates
sugars
minerals
lipids
vitamins
proteins need some help ill mark as brainliest
Answer:
vitamins prteins minerals
Explanation:
vitamins proteins and minerals
Turn the following statement into a
hypothesis using the "if, then" format.
"Sally is hungry when she eats a snack."
Answer:
If Sally is hungry then she eats a snack.
Explanation:
This is basically like cause and effect. If this certain thing happens, then this will happen.
Answer:
The correct answer will be- " If sally feels hungry, then she eats a snack".
Explanation:
A scientific hypothesis is a predicted statement proposed which explains the natural event to a limited extent. A hypothesis is based on the previous research work so is considered as the educated guess.
A hypothesis is designed in a way that it can be proved or disproved through the experiment so it should contain the variables which could be tested.
In the given question the proposed hypothesis will be-" If sally feels hungry, then she eats a snack" which shows the variables which can be tested.
HELP! True or false. A closed switch mans the electricity can flow freely through the circuit.
Answer:
True
Explanation:
An electric current can
only flow when there is
a closed path in which
electrons can move.
What is not a function of the skeletal system?
A.) providing movement
B.) storing minerals
C.) making vitamins
D.) protecting organs
What is biosphere????
The biosphere is any livable space on Earth.
So any space on Earth that can support
life is considered part of the biosphere.
For example, humans are part of the
biosphere since we are living on the Earth.
WHICH OF THE FOLLOWING CONTAINS A CARBOXYL AND AN AMINO GROUP?
Answer:
Explanation:
1.d
2.d
3.b
It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can decrease acidity, while the carboxyl group can increase acidity.
What is carboxyl functional group?The carboxyl functional group is acidic while the amine group is basic.In an amino acid, there are two functional groups;
The amine groupThe carboxyl groupThe carboxyl functional group is acidic because it contains a replaceable or ionizable hydrogen ion. The amine group on the other hand is capable of accepting a proton hence it is basic. Therefore, In a solution, the amine group can decrease acidity, while the carboxyl group can increase acidity. Groups which are identical in all amino acids are the amino and the carboxyl groups.
Therefore, It contains both an amino functional group and a carboxyl functional group. In a solution, the amino group can decrease acidity, while the carboxyl group can increase acidity.
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What is the difference between human cells and plants cells?
Answer: Plant cells are surrounded by a cell wall while human cells lack. Also human cells do not contain chloroplasts. Plants are capable of making their own food, while humans can't.
Explanation:
In an experimental investigation, the variable that the researcher changes or manipulates in order to see its effects is called
Answer:
Test group is a group that is modified or changed by the researcher and is then compared to the experimental group while carrying out an experiment.
Explanation:
While observing the data of the test group, it has to be compared with the control group to see if there is any effect of the treatment on the test or not. The control can be positive or negative or both to which the test group is compared.
Answer:
independent
Explanation:
i did test on edge
Explain how palisade cells are adapted for photosynthesis.
Answer:
The palisade cells are the main site of photosynthesis, as they have many more chloroplasts than spongy mesospheres, and also have several adaptions to maximize photosynthetic efficiency; Large Vacuole - Restricts chloroplasts to a layer near the outside of the cell where they can be reached by light more easily.
Explanation:
Why do sodium ions need channels in order to move into and out in f cells?
Answer:
Firstly they are too big to pass through the natural pores of the cell membrane the way water molecules do through aquaporins. Secondly, they would not pass through the hydrophobic layer of the cell membrane because the sodium ions are charged. This is because the hydrophobic layer does not interact positively with charged molecules/ions. Additionally, because sodium ions would be traveling up the concentration gradient into the cell, there is need for active transport. The channels proteins are able to harness energy from ATP to actively transport the sodium ions into the cell.
Final answer:
Sodium ions require sodium channels to enter or exit cells because they can't diffuse through the hydrophobic cell membrane due to their charge. Sodium channels facilitate the movement of Na+ ions without the cell using energy; this is important for nerve signals, muscle contraction, and ion balance.
Explanation:
Sodium ions (Na+) require special structures known as sodium channels to move into and out of cells. These channels are necessary because sodium ions are charged particles and cannot diffuse through the hydrophobic (nonpolar) interior of the cell membrane. The lipid bilayer of the membrane acts as a barrier to charged substances, which means that ions like sodium cannot cross it without help.
Sodium channels are protein complexes that span the membrane, creating a pathway that allows Na+ ions to move down their concentration gradient, facilitated by the structure of the channel without the cell expending energy, a process known as facilitated diffusion. This movement is crucial for various cellular functions, including the generation of electrical signals in nerve cells, muscle contraction, and maintaining the overall ion balance within the cell.
The sodium-potassium ATPase is another crucial membrane protein that uses energy to move potassium ions (K+) into the cell while pumping sodium ions (Na+) out, creating an electrochemical gradient. Potassium channels, which are open most of the time, allow K+ to diffuse out of the cell to maintain the gradient. The difference in ion concentration on either side of the membrane is essential for many cell functions.
An independent variable is?
A independent variable "is the variable in a experiment that you are testing." They're two variables in experiments you will have to watch out for a dependent variable and a independent variable. A dependent variable is a variable in a experiment that you are measuring for example height of a plant and a independent variable is a variable that you are testing in a experiment for example which plant will grow the tallest.
Hope this helps.
What type of force is applied on a football to move it forward?
Answers are
Balanced force in backward direction
Unbalanced force in forward direction
Non contact force in backward direction
Gravitational force in downward direction
Btw im in FLVS
Answer:
B. Unbalanced force in forward direction.
Answer:
B. Unbalanced force in forward direction.
Explanation:beacause idid that test
What company owns much of the bottled water industry
Answer:
nestle
Explanation:
what are 3 ways that compounds and mixtures differ
Answer:
3 ways to understand the differences between compounds and mixtures are described below in explanation.
Explanation:
1. In a mixture, no new product is formed. It is a simple tacking of two molecules without any chemical reaction occurring. For example water and sand. Compound is a new substance formed by chemical reactions occurring between various molecules. For example, carbon and oxygen combine to form carbon dioxide.
2. A compound is always homogeneous whereas a mixture can be homogeneous or heterogeneous.
3. Compounds have a fixed boiling and melting temperature. Whereas, mixtures do not have a definite melting and boiling temperature.
What type of transport does not require energy to move molecules across the plasma membrane?
concentration gradient
passive
bilayer
active
Answer:
Passive transport
Explanation:
Passive transport can easily be described as transport of atoms, molecules or ions across the cell membrane without requiring energy. The capability of a system towards growing in entropy is the reason that passive transport does not require any cellular energy, unlike the active transport. The permeability of the cell membrane depicts the rate of transfer of molecules, ions or atoms by passive transport, into and out of the cell.
Answer:
I just did the test and answer is passive transport
Explanation:
Which famous scientist is credited as the founder of the scientific method?
Aristotle
John Dalton
Sir Francis Bacon
Sir Isaac Newton
Answer:
Sir Francis Bacon
Explanation:
because Sir Isaac Newton was famous for his mathmatics skills and many more, but the did not the founder of the scientific method, it is said that Sir Francis Bacon :), funny name created the scientific method "if sufficiently clever men discussed a subject long enough, the truth would eventually be discovered." he decided to challenge this by argureing the truth and doing experiments to get the evidence he needed the real world.
hope this helps
Lipids serve a number of functions in living organisms. Which of the following is NOT a lipid function?
A).body insulation
B).short-term energy storage
C).chemical messenger carrier
D).biological membrane component
Answer:
The correct answer is B) short-term energy storage.
Explanation:
Glycogen present in the muscles and liver can provide short term energy to the body in the scarcity of glucose. Glycogen is converted into glucose by a process called glycogenolysis and provide instant energy to the body.
Body has more efficiency to store lipids as fat deposits rather than glycogen and lipids provide long term energy source to the body in the absence of glucose like in long fasting. Lipids provide 9 calory energy per gram which is more than twice than energy provided by 1 gm of carbohydrate.
So lipids are used for long term energy storage because it acts as energy reserve and used when no glycogen is left to give energy. Therefore, the correct answer is B) short-term energy storage.
What was Anton van leeuwenhoek's contribution to the cell theory?
Answer:
He was the first to observe live cells in a sample of pond water with the use of a microscope.
Explanation:
Anton van Leeuwenhoek is universally known as the Father of Microbiology.
He was the first person to discover a living cell under a microscope. He discovered protozoa (the single-celled organism) and named them animalcules.
Anton van Leeuwenhoek was a significant figure in the development of cell theory with his advanced lens-making skills, which enabled him to observe single-celled organisms, bacteria, and protozoa. These observations contributed immensely to the understanding that all life is composed of cells, a fundamental concept in the cell theory.
Explanation:Anton van Leeuwenhoek, a Dutch shopkeeper, made significant contributions to the cell theory with his developments in microscope technology in the 1600s. Despite the limitations of the lenses at that time, van Leeuwenhoek's skills in lens crafting allowed him to create microscopes powerful enough to observe single-celled organisms and ever so tiny bacteria and protozoa. His discovery of what he termed "animalcules," referring to the unseen microscopic life forms, set the stage for future scientific advancements in understanding the cellular composition of life.
Leeuwenhoek's pioneering work laid the groundwork for subsequent discoveries that would shape our understanding of cells. His observations complemented those made by Robert Hooke, who coined the term "cell." Together, their work propelled the development of the cell theory, which encompasses the fundamental concept that all living things are composed of cells, cells are the basic unit of life, and all cells come from pre-existing cells. Despite the stark contrast between van Leeuwenhoek's simple microscopes and the complex microscopes of today, his efforts were instrumental in revealing a previously invisible world, a cornerstone in biology that has carried through to modern science.