Answer:
Explanation:
Hope that helps
A molecule of water is comprised of:
A. One atom of negatively charged hydrogen and one atom of positively charged oxygen.
B. One atom of negatively charged oxygen and one atom of positively charged hydrogen.
C. Two atoms of positively charged hydrogen and one atom of negatively charged oxygen.
D. Two atoms of negatively charged hydrogen and one atom of positively charged oxygen.
What stage is represented by the cells with the dark circles?
Answer:
Interphase
Explanation:
The correct answer would be the interphase stage of the cell cycle.
The interphase stage of the cell cycle is characterized by loose nuclear materials when viewed under the microscope. It is the stage that precedes the active cell division stage during which the cell grows in volume and cellular nuclear contents such DNA, proteins, other precursors are synthesized.
What are the products of photosynthesis?
C6H12O6 + 6H20 + 602
C6H12O6 + 302 + 6H20
C6H12O6 + 302 + 3H20
C3H6O3 + 602 + 6H2O
Answer:
the first answer
Explanation:
C6H12O6 + 6H2O + 6O2
Which of the following does NOT incorporate phosphorus?
Answer:
red phosporus
Explanation:
very comfortable
elephantiasis is transmitted by :
a. fruit fly b. may fly
c. culex d. Anopheles
Answer:
The correct answer is - d. Anopheles.
Explanation:
Culex, a species off mosquitoes known as the vector for many viral and parasitic diseases such as elephantiasis, that spread the disease and to one person to other.
In America culex is the main vector for Lymphatic filariasis or elephantiasis that is caused by a parasite. However in Africa Anopheles is the main mosquitoes causes Lymphatic filariasis or elephantiasis in people of the area.
Cellular respiration converts the energy of fuel molecules to a form of energy that a cell can use to perform work. In an average day, most adult humans need to consume about 2,000 Calories to maintain their health. However, the exact amount of dietary Calories a person needs depends upon many factors, including the person's age, physical activity, size, and health. Foods that we consume vary greatly in their nutritional content and quality. A large hard-boiled egg, for example, has about 75 dietary Calories and contains about 70% of our recommended daily intake of cholesterol. A person eats one hard-boiled egg and digests the egg fully. During cellular respiration MOST of the Calories in the egg is converted to ________.
Answer:
A person eats one hard-boiled egg and digests the egg fully. During cellular respiration MOST of the Calories in the egg is converted to heat.
Most body water comes from:moisture absorbed through the skin.fluids we drink.the food we eat.metabolism.
Answer:
fluids we drink.
Explanation:
Most body water comes from fluids we drink such as water, juices etc. Our body obtains water by absorbing it directly from the digestive tract. A small amount of water is produced in the metabolism of food particles. Our body loses excess amount of water by excreting it in the form of urine from the body. Kidney is the organ that filters waster materials and excess water from the blood and remove it from the body.
Which function is performed by both goblet cells and lacrimal glands?
digestion
stress regulation
protection
growth regulation
Answer:
protection
Explanation:
The correct answer would be protection.
Goblet cells are special cells found in the epithelial layers of small and large intestines and some other organs such as those associated with the respiratory tracts. They secrete mucin and create a protective mucous layer in the walls of the intestines.
Lacrimal glands on the other hand are exocrine glands found in the eyes. They secrete the watery component of the eyes which is made up of water, electrolytes, and protein. The fluid produced by the glands protects the eyes from drying out.
Hence, both goblet cells and lacrimal glands serve protective functions.
In Osmosis, a cell becomes turgid when it:
A. expands from absorbing too much water.
B. bursts from absorbing too much water.
C. bursts from absorbing too much water.
D. contracts from absorbing too much water.
Answer:
A
Explanation:
This occurs when a plant cell is placed in a hypotonic solution.A solution were the external solution concentration is less than the internal concentration of the cell, causing water to rush into the cell.
During osmosis by absorbing too much water from outside the cell, a cell becomes turgid. The correct option is A.
What is osmosis?Osmosis is the passage of water molecules via a cell's partially permeable membrane from a solution with a large concentration of water molecules to a solution with a lower concentration of water molecules.
Osmosis occurs when the concentration gradient of water reaches zero or when the water's hydrostatic pressure equals the osmotic pressure.
Endosmosis and exosmosis are the two main types of osmosis that occur when water moves across the cell membrane. When cells are placed in a hypotonic solution, endosmosis occurs, which is the movement of water into the cell.
When cells are placed in a hypotonic solution, exosmosis occurs, which is the movement of water out of the cell.
Thus, the correct option is A.
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A ______ is a circular band of muscles designed to prevent movement into or out of a body cavity or organ. Multiple choice question.
Answer:
sphincter
Explanation:
circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning.
The chlorophyll in producers captures _________, and transforms this to chemical energy stored in __________.
Answer:
sunlight energy is the correct answer to the question
When a cell uses fatty acids for aerobic respiration, it first hydrolyzes fats to Group of answer choices glycerol and fatty acids. glycerol and amino acids. fatty acids and sugars. sugars and glycerol.
Answer:
glycerol and fatty acids.
Explanation:
Fats as biological molecules can be used as energy sources by the cell when there is low or no carbohydrate (glucose) for use.
Fats, mainly triglycerides enter metabolic pathway in an aerobic condition where they undergo catabolism to produce glycerol and fatty acids, their monomeric units. This process leads to the synthesis of ATP (Adenosine triphosphate). In other words, fats are hydrolyzed to glycerol and fatty acids
Compare and contrast the energy needs of plant and animal cells.
Answer:animal cells need more
Explanation:due to constant movement
Each of the following will result in complement activation EXCEPT Group of answer choices TLR binding to PAMP on the microbe. recognition of lipid-carbohydrate molecules on the surface of the microbe. lectin binding to mannose on the surface of the microbe. Antibody binding to antigen. All of these will result in activation of complement.
Answer:
TLR binding to PAMP on the microbe
Explanation:
The complement system is a group of proteins in the blood that enhance immune responses by complementing the ability of antibodies and phagocytic cells to mediate effector responses (e.g., lysis, activation of inflammation, opsonization, solubilization of immune complexes, etc). Complement can be activated through the recognition of microbes by soluble pattern-recognition molecules (i.e., lectin pathway) or antibodies (i.e., classical pathway). The classical pathway requires the formation of antigen-antibody complexes for its activation (it is a specific immune response). On the other hand, Toll-like Receptors (TLRs) are molecular receptors that recognize viral and bacterial products (i.e., pathogen-associated molecular patterns or PAMPs), which is a key defense mechanism from the innate immune system response.
For young men of age 20, there have been 150 rounds of DNA replication during sperm production as compared to only 23 rounds for a woman of age 20. That is a 6.5-fold greater number of cell divisions and proportionately greater opportunity for new point mutations. Yet, on average, 20-year-old men contribute only about twice as many new point mutations to their offspring as do women. How can you explain this discrepancy
Answer:
A plausible hypothesis is that deleterious germline mutations in sperm cells are removed by natural selection since sperms have to compete to fertilize the egg
Explanation:
Sperm cells need to travel through the cervix in order to reach the uterus and fertilize the egg. During this process (which is called 'fertilization'), approximately 300 million sperm cells have to compete in a race to reach an egg. During fertilization, the majority of sperm cells die off quickly because male germinal cells carry mutations that lead to abnormalities (e.g., many sperms have double heads, others no tail, etc). The sperm cells are considered to be physiologically weak because their normal functions can be easily disrupted by mutations and, simultaneously, they are under strong selective pressure to be selected during the sperm race. In consequence, deleterious germline male mutations are expected to be eliminated by natural selection, thereby sperms are selected before fertilization so only the strongest ones can compete in the race to fuse with the egg cell and thus develop one zygote.
Draw a Punnett Square to show Queen Victoria and her husband Albert. Queen Victoria’s genotype will be XX^H and Albert will be XY. X^H indicates the female sex chromosome carrying the gene for hemophilia.
Explanation:
XY XX^H
XX^H XX^H XY XX^H XX^H
XY XY XY XY XX^H
all the royal families in Europe were related
that must mean 1 family ruled all of europe
The family pedigree of Queen Victoria shows a number of hemophilic descendants. Because hemophilia is recessive disorder and Queen Victoria was a carrier. X-linked recessive disease most often occurs in males because Males have only one X chromosome.
XY XX^H
XX^H XX^H XY XX^H XX^H
XY XY XY XY XX^H
Which chromosome will cause the disease?
A single recessive gene on that X chromosome will cause the disease. Females have two X chromosomes so they can act as carriers for the disease.
What is hemophilia?
Hemophilia is a bleeding disorder that slows the blood clotting process.Hemophilia is x-linked recessive disorder
So, Queen Victoria was a carrier.
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Explain how the discoveries by Rosalind Franklin helped Watson and Crick build an accurate model of DNA.
Answer:
Rosalind's x-ray showed that the ladders of nucleotides were inside a double helix.
Watson and Crick built models with the ladders on the outside.
what is a dam
please tell
Answer:
a barrier constructed to hold back water and raise its level, forming a reservoir used to generate electricity or as a water supply.
A diagram shows a potato producing new tubers. Buds on the parent plant grow into stems that grow downwards called stolons. The end of each stolon develop in to new tuber.
1) Give two pieces of evidence which show that this is an asexual method of reproduction.
2) Explain why all the new tubers will be genetically identical.
Answer/Explanation:
Asexual reproduction is a type of reproduction in which new organisms that are identical are formed form a parent without the fusion of male and female gametes and do not require fertilization. Offspring formed are usually identical genetically, and are referred to as clones of the parent. Usually, only one parent is involved.
1. Two pieces of evidence that shows the potato growing is an asexual method of reproduction are:
i. Only one parent is involved
ii. The new tubers are identical (clones of the parent)
2. Reasons Why the new tubers will be genetically identical:
i. They grow from 1 parent by asexual reproduction
ii. No mixing of male and female gametes, so no exchange of genes takes place
One reason that Mendel chose garden peas for his experiments on heredity was because:
A. pea plants are haploid organisms.
B. peas are a popular vegetable.
C. pea plants usually self-fertilize.
D. peas have no recessive traits.
Answer:
. pea plants usually self-fertilize.
The physiologic effects of ______ include blood vessel constriction and decreased cellular metabolism.
Answer:
The physiologic effects of cryotherapy include blood vessel constriction and decreased cellular metabolism.
Explanation:
Cryotherapy is a treatment that uses cold to aid in the process of injury healing. One of the effects of low temperatures is vasoconstriction. As a result, the pressure increases, modifying the blood's flow and aiding in the healing process since blood circulation increases. The low temperatures also decrease cellular metabolism reducing the amount of oxygen that the cell needs. As a consequence, the cells have a higher chance of survival after the injury.
Hello there can anyone help me?
i have to do a project for biology and i could use some help
Describe the path of light as it travels through a microscope.
science please answer>:3
Answer:
1. Winter
2. Summer
3. greenhouse
4. global warming
A. Summer and monsoon
B. Greenhouse gases and global warming
C. Away and Towards
What is green house gases?
"The main greenhouse gases whose concentrations are rising are carbon dioxide, methane, nitrous oxide, hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs) and ozone in the lower atmosphere."
What is global warming ?
"Global warming is the long-term heating of Earth's climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth's atmosphere".
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a dark soil is usually rich in
Which statement best explains why cells in organisms such as animals reproduce?
Cell division helps animals repair old cells.
Cell division produces glucose which is used as food.
Reproduction breaks down glucose into useful energy.
Reproduction releases energy necessary for animals to survive.
Answer:
reproduction releases energy necessary for animals to survive
A young patient is short in stature, with his limbs and trunk in proportion. His mental development appears to be appropriate for his age. Determine and discuss the type of hormonal disorder he likely has.
Answer:
Dwarfism
Explanation:
Dwarfism is a growth disorder characterized by a height that is much lower than the average for people of the same race and age. Individuals with proportionate dwarfism have excessively short bodies but the dimensions of all their parts are proportionally smaller. It is due to certain diseases that are already present at birth or that manifest themselves during early childhood, and that block the normal development of their body, such as the deficiency or deficit of growth hormone is when there is not enough hormone growth released by the pituitary gland. Dwarfism does not directly lead to a deficiency in the intellectual capacities of the individual, in general their mental development is normal.
Which substance is not excreted by the body
Answer:
Saliva
Explanation:
20 This diagram shows an enzyme-substrate complex.
Structure X
Structure Z
Structure Y
m
Step 1
Step 2
Step 3
Which is represented by Structure X?
Answer:
structure X is the substrate so the answer is A
Explanation:
As it is trying to fit in the enzymes active site
According to the enzyme-substrate complex, the structure X is represented by a substrate. Thus, the correct option for this question is A.
What do you mean by Enzymes?Enzymes may be defined as biocatalysts that significantly enhance the rate of a chemical reaction without being altered in the overall process. It may be thought that all cellular reactions or processes are mediated by enzymes. Enzymes have a series of characteristics that depends on their activity.
According to the diagram given in the question, the structure X is the substrate, the structure Y is an enzyme, and the structure Z is the product. While stage 2 represents the enzyme-substrate complex.
Therefore, according to the enzyme-substrate complex, the structure X is represented by a substrate. Thus, the correct option for this question is A.
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What are the two function of sweat
Answer:
Its main function is to control body temperature. As the water in the sweat evaporates, the surface of the skin cools. An additional function of sweat is to help with gripping, by slightly moistening the palms.
Explanation: