The light-dependent reaction is one of the two reactions of photosynthesis (other is light-independent) which occurs in the thylakoid membranes of organelles called chloroplasts.
The first one uses the energy of light to make molecules needed for the next stage of photosynthesis. Two molecules produced are the energy storage molecule ATP and the reduced electron carrier NADPH.
Thermohaline circulation is movement of seawater due to differences in what two properties?
1)
density and temperature
2)
salinity and temperature
3)
temperature and depth
4)
salinity and density
Answer is 2. Salinity and temperature.
The movement of water in the ocean is called thermohaline circulation. This circulation is depends on temperature and salinity. These two factors together affect the density of seawater. More dense seawater sinks below less dense seawater and thus the oceans circulate partially based upon their temperature and salinity. Heat from the Sun affects temperature of seawater. Surface seawater gets more heat near the equator than near the poles, and similarly more in the summer than in the winter. Salinity of seawater is affected by evaporation, precipitation, ice formation, and ice melting. Evaporation increases the salinity of seawater because when seawater evaporates, the salts are left behind, thus increasing their concentration. Precipitation and river input decrease salinity because the input of freshwater dilutes the salts in seawater, thus decreasing their concentration.
A 21-year-old presents with inflammation of the testes and is diagnosed with orchitis. what is the most likely cause of his symptoms?
An isotope has the same ________, but a different ________
Answers
A) atomic number, mass number
B) Mass number, atomic number
C) number of neutrons, number of protons
D) number of protons, number of electrons
Answer:
Atomic number, mass number.
Explanation:
The three sub atomic particles of the atoms are electron, proton and neutron. The atomic number of the element is equal to the number of protons of the element.
Isotopes may be defined as the elements that have the same atomic but different mass number. The simplest example of isotopes are protium, deuterium and tritium. They have the same atomic number 1. These are the isotopes of hydrogen.
Thus, the correct answer is option (A).
Bones consist of cells suspended in an extracellular matrix. A bone is a type of
Bones consist mainly of bone tissue, which is a type of connective tissue mineralized with calcium and phosphorus crystals.
Explanation:Bones are organs that consist mainly of bone, or osseous, tissue. Osseous tissue is a type of connective tissue consisting of a collagen matrix that is mineralized with calcium and phosphorus crystals. The combination of flexible collagen and minerals makes bone hard without making it brittle.
What is a wind farm? A. a farm that uses wind to pump water for irrigation B. a place where wind energy is harvested C. a place where wind is produced D. a farm that uses wind to power equipment
Answer:
B. a place where wind energy is harvested
Explanation:
What are the limitations to using electrophoresis to verify purity of a protein product?
What events took place in anna's immune system when invaded by the s. marcescens infection? be specific in your response?
The immune system started to use its antibiotics to battle the infection. It also sent B-Cells to fight the infection while the T-cells kept that immune system strong. The immune system also inflamed the muscles to know where the antigens were so it knew where to kill them
When Anna's immune system was invaded by the s. marcescens infection, the immune system induces pro-inflammatory substance called Cytokinesis.
Explanation:
Apart from this it initiates the release of protein called as antibodies which are responsible for identification and elimination of disease causing pathogens from the body.
S. marcescens refers to gram negative bacteria which cause serious urinary as well as respiratory infections. Usually it is found in places such as hospitals, soil and water.
Why do you think there are fewer heart transplants performed each year than kidney transplants?
This is because, people, generally, have two kidneys and are also able to function properly with one functional kidney. Therefore it is easier to perform kidney surgery without putting the patient’s life at risk as compared to heart surgery. Everyone has one heart, a critical organ whose surgery has to be well planned and done only if the risk of not doing the surgery outweighs that of doing the surgery.
Two homologous sets of genes" can mean either two similar collections of genes coming from your two separate parents or two similar collections of genes arranged on two complete sets of chromosomes
Final answer:
Homologous chromosomes are pairs of chromosomes that contain the same genes in the same order, but may have different alleles, leading to genetic diversity. Individuals inherit one chromosome from each parent, which contributes to traits like blood type or dimples, and can result in homozygous or heterozygous genotypes.
Explanation:
Understanding Homologous Chromosomes
When we speak of 'two homologous sets of genes,' we are referring to two related sets of genes that define our hereditary traits. Each person receives 23 chromosomes from each parent, for a total of 46. These chromosomes come in pairs, one from the mother and one from the father, and thus are described as homologous. Homologous chromosomes have the same genes arranged in the same order; however, they may carry different alleles, which are variations of these genes.
These different alleles contribute to the genetic diversity in humans. For instance, if we consider the gene responsible for blood type, a person may inherit two identical alleles, which would make them homozygous (e.g., AA, BB, OO), or two different alleles, making them heterozygous (e.g., AB). Genetic inheritance plays a crucial role starting at conception when the sperm and egg cell unite, each donating 23 chromosomes.
A straightforward example is the trait for dimples; a child can inherit the allele for dimples from one parent and an allele for no dimples from the other parent. This demonstrates how homologous chromosomes can carry different genetic information that affects the same trait and how this variation results in the diverse characteristics we observe.
Many yogurt containers have a seal that says contain live cultures. This means that there are live bacteria in the yogurt which can function as probiotics. Which sentence BEST describes the purpose of these probiotic bacteria?
A-the bacteria are beneficial because they give the yogurt it’s fruit flavors
B-the bacteria are beneficial because they provide an additional source of protein in the yogurt.
C-the bacteria are beneficial because they act as a preservative to extend the shelf life of the yogurt
D-the bacteria are beneficial because they can improve the balance of good bacteria in a persons intestines.
Black fur(b) in guinea pigs is dominant over white fur(b). find the probability of a hybrid offspring in the cross: bb x bb. 0% 25% 50% 75% 100%
Answer:
The correct answer is 75%
Explanation:
I just had this question and got it right.
Genetic material that directs the cell is called (2 points) RNA the nucleus cytoplasm DNA
what is a characteristic of scavengers that make them different from carnivores PLEASE HELP.
Which organ suffers the least damage during prolonged starvation?
proposed the polynucleic model, stating that DNA and RNA were composed of nucleotides
The polynucleotide model, suggested by Alexander Todd and Erwin Chargaff, states that DNA and RNA are composed of nucleotides, which include a sugar molecule, a phosphate group, and a nitrogenous base. The sequence of these bases forms the genetic code.
Explanation:The polynucleotide model was proposed by biochemists Alexander Todd and Erwin Chargaff. This model states that DNA and RNA are composed of nucleotides, the building blocks of these macromolecules. Nucleotides are made up of a sugar molecule, a phosphate group, and a nitrogenous base. In DNA, these bases are adenine, guanine, cytosine, and thymine, while in RNA, thymine is replaced by uracil. The number and sequence of these bases determine the genetic code.
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which of the following soils has the roughest texture potting soil silt clay sand
Answer:sample c
Explanation:
True or false: the quantity represented by ω0 is a function of time (i.e., is not constant).
In eukaryotic nerve cells, k+ concentrations at rest are __________. in eukaryotic nerve cells, k+ concentrations at rest are __________. higher inside the cell than outside the cell higher outside the cell than inside the cell equivalently high both inside and outside the cell equivalently low both inside and outside the cell
One function of the plant cuticle is to increase water uptake by roots true or false
. Many cities have “combined” sewers. In good weather, these systems funnel sewage to treatment plants. During rainstorms street runoff is combined with sewage. Combined sewers in cities can be problematic because _____. the sewers cannot handle the volume of waste from street runoff and sewage sewers are often blocked by trash that people have thrown into them street runoff cannot flow into the sewers and be safely taken to treatment plants street runoff often causes the sewers to deteriorate
The given blank can be filled with the sewers cannot handle the volume of waste from street runoff and sewage.
The combined sewage system is very popular in many big cities. The sewage system handles all the sewage combining from the houses. During the rainy season, the water flows in the sewer, causing the overflow of the sewers and spread of water in the nearby regions.
A. what role does mrna play in the flow of information in the cell? (hint: remember the central dogma of molecular biology.) please include the basic flow of information in the cell.
An animal emits a response in the presence of a certain tone. if a slightly higher pitched tone elicits the same response, then stimulus _______ has taken place
True or False
Genetics account for all differences in animals.
plz asap . 27 points
Constructed Response: Exploring the South American rain forest, a scientist discovers a mysterious organism and brings it back to the lab for further study. What cell characteristics should the scientists examine to tell whether the organism is an animal or plant? Why?
Which is a component of the modern cell theory that was not part of the original cell theory? All organisms are made of cells. All cells are similar in composition and metabolic activities. All cells come from preexisting cells. A cell is the basic unit of structure and function for all living things.
All organisms are made of cells. All cells are similar in composition and metabolic activities. Thus, the correct option is A.
The first theory about cell was proposed by two German biologist Theodor Schleiden and Matthias Schwann in 1839.
What are the postulates of cell theory?The main postulates of this theory are as follow:
1. Cell is the basic structural and functional unit of living organisms.
3. All living organisms are composed of cells.
3. New cells arise from already pre existing cells by division.
Modern cell theory is the new version of same cell theory. It also added that all cells are chemically similar in composition and metabolic activities. Cells contain hereditary materials and energy flow occurs with in cell.
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Your blood pressure is 135/85, what does this mean in terms of the amount of pressure in the systemic arteries and in terms of what the heart must generate to eject
High blood pressure
Which of the following terms describes the study of genes during the 1900s?
Fats obtained from a variety of foods are essential nutrients but may be harmful to the body in some forms. (blank)are healthy fats that have at least one double bond in the fatty acid chain. Most (blank) are artificially hydrogenated fats that have detrimental effects on health.
-saturated fat
-unsaturated fat
-trans fat
When habitats are destroyed, specialized species are more likely than generalized species to _____.
adapt to change
migrate to new habitats
move into a new niche
become extinct
Answer: become extinct
A generalist species is able to thrive in a wide variety of climate and environmental conditions and have varied diets. When their habitats are destroyed, they can easily adapt to change, migrate or move into a new niche.
A specialist species can thrive only in a narrow range of climate and environmental conditions and has a limited diet. When this environment or habitat is destroyed, they are most likely to become extinct than the generalist species.
Answer:
become extinct
Explanation:
I had it on a quiz
a certain tapeworm secretes a chemical that slows the intestinal pulsation of its host. this helps to ensure that the tapeworm isnt expelled from the body of the host. explain how adding this chemical to a drug for humans might increase the drugs effectiveness