Beans are the members of the family fabaceae or leguminoceae. The roots of legumes (beans) have root nodules. In the root nodules symbiotic nitrogen fixing bacteria such as Rhizobium is present that fixes atmospheric nitrogen to the soil. No plants can fix atmospheric nitrogen to the soil except nitrogen fixing bacteria. Mr. Hammond tilled (mixed) back beans plants into the soil to get nitrogen fixed in the soil by root nodule bacteria present in beans plants for next year’s crops.
The modern farmers plant legumes in order to influence the growth of nitrogen-rich fertilizers for their other crops. It is not the beans that are producing the fertilizer for the other crops, it is the nitrogen-fixing bacteria, that is, Rhizobium that generally performs the function of nitrogen fixation.
The legumes, like beans, develop in a symbiotic association with soil-dwelling bacteria. The bacteria utilize gaseous nitrogen from the air in the soil and feed this nitrogen to the legumes, in return the plant gives food in the form of bacteria to the bacteria.
When the plant dies, the fixed nitrogen is discharged, making it accessible to other plants, this also facilitates to fertilize the soil.
The diagnostic procedure to measure the capacity of the lungs and the volume of air during inhalation and exhalation is ________.
Why are steroids important to life?
Invasion and multiplication of bacteria in body tissues result in local cellular injury due to _______________.
An nrbc (nucleated red blood cell) is _______ a mature erythrocyte.
a. less mature than
b. the same as
c. more mature than
d. from a different cell line than
Answer: A.
Nucleated red blood cell is less mature than a mature erythrocyte. They
are erythroid precursors that have apoptotic nucleus, the last nucleated stage of
red blood cell production to contain a defined, intact nucleus before the
erythrocyte losses its nucleus.
Moreover, they are confined to the bone marrow, in the peripheral blood in newborns and in uncompensated hemolytic anemia.
Which is the correct order the organisms would appear during primary succession?
A. Mosses, trees, lichens, grasses and annual flowers, bushes and shrubs
B. Lichens, mosses, grasses and annual flowers, bushes and shrubs, trees
C. Bushes and shrubs, mosses, lichens, grasses and annual flowers, trees
D. Lichens, bushes and shrubs, grasses and annual flowers, trees, mosses
C, bushes and shrubs, mosses, lichens, grasses and annual flowers, trees
hope I helped ..
Why is pigweed so difficult to control? select all that apply. why is pigweed so difficult to control? select all that apply. the number of inches it grows daily the way it spreads like a vine on the ground and is hidden from view its thick, woody stem the number of seeds it produces?
Pigweed is difficult to control due to its high seed production, rapid growth, and ability to germinate easily. It is also challenging because of the development of herbicide resistance. Integrated management strategies are necessary to control pigweed effectively.
Explanation:Pigweed is a problematic agricultural weed because it possesses several attributes that make it difficult to control. One of the key reasons is its ability to produce a vast number of seeds, which can lie dormant in the soil for extended periods, ensuring its prolonged presence in an area. Its seeds germinate readily, often requiring little to no special conditions. This contributes to a substantial 'seed bank' in the soil, guaranteeing future generations of the weed.
Another challenge in controlling pigweed is its rapid growth. Quick growth allows pigweed to efficiently compete for resources, which is crucial in agricultural settings where it can out-compete crops for necessary nutrients and light. Additionally, weeds like pigweed are known to reproduce readily, enhancing their chances of survival and spread within a farm.
Methods such as chemical control, using herbicides, can face challenges as some weeds have developed resistance to commonly used herbicides, further complicating control efforts. Integrated management strategies, combining cultural practices with biological and chemical controls, are often required to effectively manage pigweed populations in agricultural fields.
What process is most important in the expansion of plant cells?
forms the hydrophobic part of the plasma membrane
Final answer:
The hydrophobic part of the plasma membrane is comprised of the inward-facing tails of phospholipids, forming the lipid bilayer that separates internal cellular contents from the extracellular environment.
Explanation:
The hydrophobic part of the plasma membrane is formed by the tails of phospholipids. These hydrophobic tails face inward, shielded from water, while the hydrophilic heads face outward, interacting with the aqueous environment on both sides of the membrane. This arrangement creates the integral structure known as a lipid bilayer, which is essential for the function and stability of the cell membrane. Additionally, cholesterol and integral proteins, with their hydrophobic regions, also contribute to the hydrophobic nature of the membrane's core.
After protein translation is complete, the newly-formed polypeptide A. embeds itself on the surface of a ribosome, which carries it back to the nucleus for alterations. B. folds into a three-dimensional structure due to the interaction of neighboring amino acids in sequence. C. moves to the mitochondrion, where it is broken down to form ATP. D. breaks down the RNA molecules that helped form the polypeptide.
Answer:
B. folds into a three-dimensional structure due to the interaction of neighboring amino acids in sequence.
Explanation:
After completion of translation the nascent polypeptide molecule enters endoplasmic reticulum (ER) from cytosol in order to fold into a specific three dimensional structure. A polypeptide becomes functional only after being folded, in nascent form it is non functional. In ER, a linear polypeptide molecule folds to form either an alpha helix or a beta sheet due to hydrogen bonding between various amino acids, these are secondary structures. These secondary structures then fold even more to form tertiary structure with the help of ionic bonds, hydrophobic interactions and disulphide linkage/bonds between various amino acids. After tertiary structure, finally a quaternary structure is obtained because of oligomerisation of two or more tertiary proteins. This well folded and oligomerised protein is usually a functional form of protein.
In human males, the urethra is used for transport of
In human males, the urethra is used for transport of semen and urine.
The urethra is a thin fibromuscular tube through which urine and semen are transported from the bladder and ejaculatory ducts, respectively, to the outer part of the body in human males. The male urethra is made up of several heterogeneous parts which are membranous, prostatic and spongy. The urethra only transports urine in human females.
When sperm cells and egg cells combine we say?
Light energy from the sun is converted by plants into _____.
mechanical energy
chemical energy
electricity
leaves
Answer:
chemical energy
Explanation:
Green plants have chlorophyll pigment that serves to trap the sunlight. The light energy from sun is used to drive the ATP synthesis during light dependent reactions of photosynthesis. The ATP serves as energy source for dark phase of photosynthesis during which carbon dioxide is fixed into glucose. Hence, plants use the process of photosynthesis to convert the light energy of sun into chemical energy of glucose.
The amphibians, reptiles, and mammals comprise which group?
The rapid growth of the human population during the last two centuries is INDIRECTLY responsible for which environmental concern, that in turn, will lead to future species extinction
The nurse is preparing a patient for a procedure with the thoracoscope to reduce the exacerbations of chronic obstructive pulmonary disease (copd). what procedure should the nurse be sure the patient understands?
identify the process by which information in segments of human DNA can be expressed by a bacterial cell
Genetic engineering uses recombinant DNA technology including manipulation of the segments of human DNA that can be expressed by a bacterial cell.
What is genetic engineering?They are the different scientific-technological techniques and procedures that allow the human being to modify or recombine the DNA and other nucleic acids of living beings.
To do this, genes are added, altered or deleted from the genetic code of living beings, also called genetic editing.
Therefore, we can conclude that genetic engineering uses recombinant DNA technology including manipulation of the segments of human DNA that can be expressed by a bacterial cell.
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Which are structures of the excretory system? Check all that apply. kidney spleen bladder esophagus ureter urethra
Thermal pollution is?
A, b or c
The layer of the epidermis in which cells die because of their inability to get nutrients and oxygen is the clear layer called
Why would a doctor inject a dilute salt solution rather than pure water into the bloodstream of a patient who has suffered severe blood loss? select one:
a. because salt will assist in co-transport of needed nutrients into the patient's cells.
b. because pure water might cause the patient's red blood cells to shrink.
c. because pure water might cause the patient's red blood cells to burst.
d. because salt will help prevent bacterial infections?
Heart muscle cells would tend to separate without ________
a. stroma
b. intercalated discs
c. flana
d. myofilaments
Intercalated discs in heart muscle cells play a crucial role in connecting these cells together and facilitating coordinated contraction of the heart. Without them, heart muscle cells would tend to separate.
Explanation:Heart muscle cells, also known as cardiomyocytes, would tend to separate without intercalated discs. Intercalated discs are complex structures that connect heart muscle cells to each other. They play a pivotal role in enabling coordinated contraction of the heart, facilitating the efficient pumping of blood. Without intercalated discs, the coordinated contraction would not be possible, causing the heart muscle cells to separate. So, the correct answer to your question is b. intercalated discs.
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The baroreceptors in the carotid sinus and aortic arch are sensitive to which of the following?
Answer: Changes in arterial pressure
Baroreceptors are present in carotid sinus, and their main function is to maintain homeostasis. They are responsible for maintaining the blood pressure. They can sense the changes in pressure of the walls of the arteries. This way blood pressure is regulated.
Since the main function is related to blood pressure, other options are incorrect.
During an infection, _____ are mobilized in large numbers from the bone marrow to fight pyogenic bacterial infections.
A grassland is a region where the annual precipitation is _______________________________________________________________
Which of these is a bacterium that is sometimes used to turn milk into different kinds of cheeses?
Which of the following contributes to global warming?
A) acid rain
B) greenhouse gases
C) tropospheric ozone
D) ozone hole
How does the use of nonrenewable resources compare to the use of renewable resources?
a. The use of renewable resources is potentially more harmful to the environment than the use of nonrenewable resources.
b. The use of renewable resources is more common and widespread than the use of nonrenewable resources.
c. The overuse of renewable resources can lead to problems similar to those associated with the use of nonrenewable resources.
d. Renewable resource use is more problematic than the use of nonrenewable resource use.
Answer: c. The overuse of renewable resources can lead to problems similar to those associated with the use of nonrenewable resources.
Renewable resources are those resources, which can be replenished after once used such as wind, water, sunlight and others. Non- renewable resources are those resources, which cannot be replenished after once used, for example fossil fuels like coal, petroleum and natural gas.
Although, renewable resources are abundantly available in nature but their judicious use is necessary, so that these resources can meet the needs of the future generation, ensuring sustainable development of human society. But, in reality the overuse of renewable resources can lead to problems similar to those associated with the use of nonrenewable resources. This is because of increasing population and pollution in the environment, has deteriorated the quality and decreased quantity of renewable resources.
The overuse of renewable resources can lead to problems similar to those associated with the use of nonrenewable resources. Therefore, option (C) is correct.
What are non-renewable resources?While nonrenewable resources, such as fossil fuels, are finite and have a limited supply, renewable resources, such as solar or wind energy, can be replenished naturally or through human intervention. However, it is important to note that the overuse or mismanagement of renewable resources can lead to negative consequences, similar to those associated with nonrenewable resources.
For example, if renewable resources are exploited at a rate faster than they can naturally regenerate, it can result in depletion, habitat destruction, or environmental degradation. Thus, sustainable management and responsible use of both renewable and nonrenewable resources are crucial for long-term environmental sustainability.
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What is considered to be the average natural mutation rate that occurs during dna replication? what is considered to be the average natural mutation rate that occurs during dna replication? one in every trillion nucleotides replicated. one in every ten thousand nucleotides replicated. one in every billion nucleotides replicated. one in every million nucleotides replicated?
In double fertilization, one sperm fuses with the egg to form the diploid zygote and the other sperm fuses with two polar nuclei to form the ____________.
In double fertilization, one sperm fuses with the egg cell to form the diploid zygote and the other sperm fuses with two polar nuclei to form the endosperm.
What is Double fertilization?Double fertilization is the process of fusion of the sperm (male gamete) with the female gamete to produce different cells. Double fertilization is made up of two processes which are fertilization and triple fusion.
Fertilization includes the fusion of the haploid male gamete with the haploid female gamete to form a diploid zygote which forms the new plant which is diploid.
Triple fusion includes the fusion of the male gamete which is haploid with the two polar nuclei which are present with the egg cell in the female gametophyte, thus producing a triploid (3n) primary endosperm nucleus or Endosperm.
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The nurse is assessing a 15-year-old high school student who is worried because she has not yet begun menses. the nurse tells the student that she may attain her menses late. what assessment findings might the nurse have noted about the patient? the patient:
The assessment findings that the nurse should note in the patient is Anorexia nervosa, thyroid disorders and as well as Type 1 Diabetes mellitus.
It is because a female who have a low in regards of her body mass index because of malnutrition can have a delayed onset of menstruation and those with type 1 diabetes or thyroid disorder are known to cause amenorrhea of which is defined as having an absence of menstruation because of interruption in the hypothalamic pituitary ovarian uterine.
The nurse have noted that the patient might have anorexia nervosa due to low body mass index, due to malnutrition a delayed onset of menstruation may result. Anorexia is an eating disorder characterized by low weight and a strong desire to be thin. Another assessment finding is that the patient might have type 1 diabetes mellitus where there is a risk of developing amenorrhea caused by interruption in the hypothalamic-pituitary-ovarian-uterine axis.