Answer:
. Reproduction is aided by flowers, protected seeds, and insect pollinators.
Explanation:
The set of plants which produces flowers that develop to fruits,which houses seeds are called angiosperms.They are the most diverse plants species . The fruits are edible,while the flowers are reproduction.The seeds are for regeneration.
They are vascular plants with specialized tissues of xylem and phloem,and other tissues for structural characteristics.
Insects,animals,man and wind are the agents of pollination of the flowers, The Pollen grains from these flowers are transferred far away from the original parent sources,Hence this ensure widespread dispersal,and diversity of Angiosperm population.
(A) Reproduction is aided by flowers, protected seeds, and insect pollinators.
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Look at this definition of species: "A species is a lineage of . . . populations which maintains its identity from other such lineages and which has its own evolutionary tendencies and historical fate." This definition best represents the:
Answer:
The correct answer is - Evolutionary species concept
Explanation:
The given definition is the definition of the evolutionary species concept or the lineage species concept that can be understood by the following -
Evolutionary species concept depicts that "a species is a single lineage of ancestor-descendant populations which keeps up its character from other such lineages and which has its own evolutionary inclinations and historical fate.”
Thus, the correct answer is - Evolutionary species concept
write two functions of Endoplasmic and reticulum
Answer:
there are two types of endoplasmic reticulum, rough endoplasmic reticulum and smooth endoplasmic reticulum, the rough endoplasmic reticulum is the site of protein manufacture( because it has ribosomes) whereas the smooth endoplasmic reticulum manufactures fat molecules or lipids. these lipids helps in membrane biogenesis, which is the process of formation of plasma membrane. the main function of the endoplasmic reticulum is that it serves as channel for transportation of proteins etc between various cells or a cell organelle and another cell. In the liver, detoxification of poisons take place due to the help of smooth endoplasmic reticulum.
Answer:
Functions of Endoplasmic reticulum;
It forms cell circulatory system and helps in transportation of materials inside the cytoplasm.It acts as cytoskeleton and gives mechanical support.It helps in compartmentalization of cytoplasm for synthetic activity.These cell organelles form primary lysosomes.Hope this helps...
Good luck on your assignment..
Which of the following sentences correctly uses a pronoun to create emphasis?
O He, Jacob Smith, studied for 10 hours.
O He himself wrote the 20-page paper.
O He and they trained for the marathon.
O Himself worked for weeks on the project.
The correct answer is B. He himself wrote the 20-page paper.
Explanation:
Pronouns such as himself, yourself, themselves, or myself, which are known as intensive pronouns, are used to emphasize the subject of a sentence, usually by placing the pronoun right the subject or main pronoun. This can be seen in the sentence "He himself wrote the 20-page paper" because the pronoun "himself" emphasizes the action "wrote" performed by "he", which is the main subject of the sentence. According to this, it is in the second sentence a pronoun creates emphasis.
Which three organs are part of the digestive tract? salivary glands, gall bladder, appendix esophagus, stomach, small intestine teeth, tongue, mouth esophagus, liver, pancreas?
Answer:
The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.
Writers note:
Who ever gave you that question is a horrible being. The digestive tract is quite complex. I hope I helped in some way; sorry if I confused you.
Which tools do meteorologists use to help create weather forecasts?
guesses
weather service maps
opinions from weather watchers
personal observations
Weather service maps are used by meteorologists to help create weather forecasts.
Who is a Meteorologist?
This is an individual which specializes in the use of scientific methods in predicting Earth's atmospheric phenomena such as weather.
Tools such as weather service maps are used by them to help create weather forecasts.
Read more about Meteorologist here https://brainly.com/question/150949
A researcher is examining the response of corn to herbivory by white-tailed deer. She sets up a corn field with a very high fence to exclude deer and then a field where deer can have free access. After four weeks, she measures the height of the corn plants and the number of ears or corn each plant produces. What is the independent variable in her experiment
Answer:
The herbivory by the white-tailed deer
Explanation:
The independent variable can be defined as the variable that who's values do not depend on those of another.
The independent variable in this case is the herbivory by the white-tailed deer which is divided into two categories.
The dependent variables is the response of the corn to the independent variable which are measurements to be taken as shown in the question; the height of the corn plants and the number of ears or corn each plant produces.
What are ways that humans can lower bio diversity as they use the environment
Answer:
1. Reduce the misuse of land.
2. Reduce climate change.
3. Reduce invasive species.
"a man with genotype bb and a woman wth genotype BB have four children. how many of the children are likely to have blue eyes"
Answer:
No children will have blue eyes all of them carry brown eyes only.
Explanation:
The cross between a male with bb genotype and female with BB genotype will be as follows :
The gametes will be formed
male: b and b
female: B and B
By Punnett square:
B B
b Bb Bb
b Bb Bb
As all the offspring will have a heterozygous condition with dominant B (Brown) and recessive b( blue) so there are no offspring will be with the phenotype of the blue eyes.
What happens to the products of the Krebs cycle?
Answer:
pyruvate is broken down in a series of reactions to form CO2
Explanation:
D.H., a 54-year-old resort owner, has had multiple chronic medical problems, including type 2 diabetes mellitus (DM) for 25 years, which has progressed to insulin-dependent DM for the past 10 years; a kidney transplant 5 years ago with no signs of rejection at last biopsy; hypertension (HTN); and remote peptic ulcer disease (PUD). His medications include insulin, immunosuppressive agents, and two antihypertensive drugs. He visited his local physician with complaints of left ear, mastoid, and sinus pain. He was diagnosed with sinusitis and Candida albicans infection (thrush); cephalexin (Keflex) and nystatin were prescribed. Later that evening he developed nausea, hematemesis, and weakness and was taken to the emergency department. He was admitted and started on IV antibiotics, but his condition worsened throughout the night; his dyspnea increased and he developed difficulty speaking. He was flown to your tertiary referral center and was intubated en route. On arrival, D.H. had decreased level of consciousness (LOC) with periods of total unresponsiveness, weakness, and cranial nerve deficits. His diagnosis is meningitis complicated by an aspiration pneumonia and atrial fibrillation. D.H. has continued fever and leukocytosis despite aggressive antibiotic therapy.
What is the probable route of entry of bacteria into D.H.'s brain?
Answer:
Chances are, you haven't infected the bacteria in a hospital setting or surgery, as you could have contacted them anywhere.
What happened with said patient was the face of the immunosuppressive treatment, the defense of the patient was decreased and it generated a worse picture with a bacterium that would not act in such a pathogenic way in another person who does not receive corticosteroid treatment.
This deduction could be made since prior to pneumonia and meningitis there were other infections that occurred in the patient indicating immunosuppression or lowered immunity, which were alerts for professionals.
Explanation:
The immunosuppression generated by corticosteroids is an adverse effect of said drug, thus causing bacteria or other pathogenic microorganisms to more easily generate lethal diseases that occur, similar to the human immuno-insufficiency syndrome.
These pneumonias and meningitis are very common in children but not in adults, which means that the defense of acquired immunity throughout life would not be serious.
In patients like these where corticosteroids suppress the path of humoral defense factors, thus inhibiting the presence of COX and thromboxane A2 in the immune lineage, that is why the immunological tests are weakened and the bacteria have more spread or harmful effects such as this patient.
The bacterium does not indicate that it is intra-surgical or hospital-based because of the severity of the disease it triggered, but because the patient is immunosuppressed.
What happens when plant cover is removed from the ground?
Answer:
They might die
Explanation:
Because they left the ground
Arrange the structures in the following list in the order that blood will encounter as it flows from the heart back to the heart in the cardiovascular circuit.
1. venules
2. arterioles
3. capillaries
4. elastic arteries
5. medium veins
6. large veins
7. muscular arteries
Answer:
The correct order is - 4.elastic arteries, 7.muscular arteries, 2. arterioles, 3. capillaries, 1. venules, 5. medium veins, 6.large veins
Explanation:
The cardiovascular circuit Or the pathway is the sequence of structures that takes oxygenated blood from the heart and deliver it to various parts of the body and than beings the deoxygenated blood back to the heart.
This cardiovascular circuits involves various types veins, Capillaries and arteries and heart. The correct order of the structures of order that blood will encounter as it flows from the heart back to the heart is -
4.elastic arteries, 7.muscular arteries, 2. arterioles, 3. capillaries, 1. venules, 5. medium veins, 6.large veins
What are some questions that biologists might ask about the living things they study?
Molecular biology is asked about the living things they study
2. Research how antibiotics affect bacterial cells. Which cell structure(s) are typically targeted? Based on this information do you think human cells are affected by the antibiotics? Include references to information sources used.
Answer:antibiotics produce antigens that kills bacteria....our WBC's also protect our body by producing antigens
Explanation:
No its limited use for human is good bcz its their body need over use affect kidneys
Answer:
press dat crown for meh
Explanation:
Which of the following is the first step a researcher should take before experimentation begins?
A. Select laboratory equipment.
B. Generate a hypothesis.
C. Design experimental procedures.
D. Apply the units of the SI system.
Answer:
. Generate a hypothesis.
Explanation:
Normally the first step to take before any experimental procedures is the to make observations,This is necessary before experimental designs and hypothesis can occur.It is important because certain intriguing phenomenon must be unravel.
Later on some questions as to why/how ,or when this observation occur should be next.This is important to find out if there is any clues to the subject under investigation by previous researchers which may be useful to unravel more facts about the questions.
Note;In most cases formulation of questions is listed first before observation.However, in reality the two occurs simultaneously,because it may be the observation that promoted questions.
When an educated guess is needed to explain the phenomenon observed,hypothesis must be set up. The evidences available must be able to support the hypothesis Therefore these evidences must be testable ,to prove the hypothesis beyond doubt.
Experimental set up should be designed to test the hypothesis,and to confirm its feasibility.This involved the factor being manipulated (independent variable) and the factor which varies with the independent variable the dependent variable.Certain data are obtained,and collated.
Theses data are analysed to find out the relationships,And therefore to find out how they varies with the independent variables.
Conclusion is the last step,where a submission is reached if the data support the hypothesis,which may provide explanation to the phenomenon.
Based on this the sequence should be 1.Research questions 2.Observation 3.Hypothesis 4.set up experimental design and data collation 5. Data analysis 6,conclusion.
However, from the options given the nearest to the first step in absence of observation and research questions is hypothesis.Normally, if a research question and observation were there,this will be chosen as third.But,in absence,this can be taken as first
Summarize the differences between how the salt-sensitive plant cell and the salt-resistant plant cell behave in the 10% salt solution..
Answer:
Salt sensitive plants when exposed to a 10% salt solution will result in the water in the plant cell to leave and get attached to the salt solution through the process called Osmosis. Osmosis is a phenomenon which occurs as a result of movement of fluid from a region of lower concentration to a higher concentration.
This causes the plant cells to shrink and wilt.
However when a salt-resistant plant is exposed to a 10% salt solution osmosis doesn’t occur and the plants remains the same without any form of shrinkage or wilting.
A plant that is sensitive to salt means that when it is placed in a salt solution it's cell structure will change by the process of osmosis.
Osmosis is the movement of water molecules through a semi permeable membrane from a region of low solute concentration to a region of higher solute concentration.
Therefore when the salt sensitive plant is placed on the 10% salt solution, there would be water loss from the intercellular compartment to the extracellular leading to the protoplasmic shrinking called plasmolysis.
A plant that is resistant to salt means that the plant is not in anyway affected when placed in a salt solution.
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Before exploring the processes that occur in the small intestine, you must be able to use the vocabulary of the small intestine effectively. Match the correct term with the sentence that describes the structure of the small intestine.
1. The three structural features of the small intestine that increase its surface area are the__________ , __________the villi, and the microvilli.
2. The finger-like projections that cover the circular folds of the small intestine and contribute to the increased surface area of the small intestine are called_________ .
3. The absorptive cells that line the wall of the intestine are called_______________ .
4. The hair-like projections that cover the surface of an enterocyte and contribute to the increased surface area of the small intestine are called____________ .
5. The collective term for the carpet of microvilli that covers the enterocytes of the small intestine is the_______________ .
6. Each villus contains a lymphatic vessel called a _____________ that absorbs fat-soluble nutrients into the lymph fluid.
7. The tiny blood vessels located in each villus that absorb water-soluble nutrients into the bloodstream are_____________ .
8. The first section of small intestine, receiving chyme from the stomach, is called the________________ .
9. The middle portion of the small intestine is called the_______________ .
10. The last portion, or segment, of the small intestine is called the_____________ .
a. brush border
b. villi
c. jejunum
d. enterocytes
e ileum
f. ileocecal valve
g. capillaries
h. circular folds
i. microvilli
j. pyloric sphincter
k. duodenum
l. lacteal
Answer:
Circular folds, villi, enterocytes, microvilli, brush border, lacteal, capillaries, duodenum, jejunum and ileum.
Explanation:
1. The three structural features of the small intestine that increase its surface area are the circular folds, the villi, and the microvilli.
2. The finger-like projections that cover the circular folds of the small intestine and contribute to the increased surface area of the small intestine are called villi.
3. The absorptive cells that line the wall of the intestine are called enterocytes.
4. The hair-like projections that cover the surface of an enterocyte and contribute to the increased surface area of the small intestine are called microvilli.
5. The collective term for the carpet of microvilli that covers the enterocytes of the small intestine is the brush border
6. Each villus contains a lymphatic vessel called a lacteal that absorbs fat-soluble nutrients into the lymph fluid.
7. The tiny blood vessels located in each villus that absorb water-soluble nutrients into the bloodstream are capillaries.
8. The first section of small intestine, receiving chyme from the stomach, is called the duodenum .
9. The middle portion of the small intestine is called the jejunum.
10. The last portion, or segment, of the small intestine is called the ileum
All these describes the components/features of the small intestines and their functions in the body system.
The diagram shows the position of earth during solstice. select the area that would be getting around 24 hours of daylight each day.
The answer is Artic Circle Zone (red square at the top)
Explanation:
A solstice occurs two times in a year when the Sun reaches farther either the south or the north of Earth. In the image presented, there is a solstice because the sunlight reachers farther in the North. Additionally, this phenomenon occurs due to the tilt (inclination) of Earth, and it increases the number of daylight/night hours in different zones.
In the case of the Arctic Circle Zone (north pole) it is likely during the solstice, this zone has around 24 of daylight each day because almost all this zone is directly exposed to the sunlight, and therefore this will always be reached by sunrays despite the rotation of Earth (rotation of Earth in its axis). On the other hand, other zones will not be exposed to sunlight all the time because the location and rotation will cause these areas are in the dark zone of Earth during specific hours every day.
Answer: The top red square near the axis.
Explanation:
Ok, the Earth's axis is the "line" around which the Earth rotates.
This means that after a rotation, the 3 bottom red boxes will be in the dark side of the diagram ( for example, if you have a ball and you grab it with the logo facing you, when you rotate the ball, the logo will be in the other side, and you will not be able to see the logo).
Now, as the area near the axis actually does not move that much, the red square near the axis (the top red square) will be most likely getting 24 hours of light each day.
PLEASE HELP!! Gas cloud 1 is likely to form a star. Gas cloud 2 is not. Based on this information, match the given conditions with each cloud. *options and pictures attached*
Answer:
Gas cloud 1: It spreads with a greater volume and less concentration of elements. Its temperature stays well below the 14 million Kelvin. It has hydrogen atoms that retain there electrons.
Gas cloud 2: Its volume shrinks and the density increase die to the gravity . Its temperature stays above the 14 million kelvin . Hydrogen atoms shed there electron.
Explanation:
As you already know, stars form within clouds of gas. These clouds have interstellar gases composed mainly of dust and hydrogen. When subjected to low temperatures, gases react and combine to form molecules that create clouds and continue to react until they form stars.
Cloud 1 has characteristics that show that it will form a star which are: It spreads with a greater volume and less concentration of elements, its temperature stays well below the 14 million Kelvin, it has hydrogen atoms that retain there electrons.
as we know that cloud 2 will not form stars we can say that its characteristics are: Its volume shrinks and the density increase die to the gravity , its temperature stays above the 14 million kelvin , hydrogen atoms shed there electron.
Answer: Gas cloud 1: Its volume shrinks and the density increase die to the gravity. Its temperature stays well below the 14 million Kelvin. It has hydrogen atoms that retain there electrons.
Gas cloud 2: It spreads with a greater volume and less concentration of elements. Its temperature stays above the 14 million kelvin . Hydrogen atoms shed there electron.
Explanation: I just took the test and these are the right answers
Give 8 Differences each between immunization and immunity
Anyone that answers I will mark the person as brilliant
Answer:
1- The immune system develops antibodies to the disease so that it cannot make you sick again.
2- Immunization describes the actual changes your body goes through after receiving a vaccine.
3- Immunization is the process whereby a person is made immune or resistant to an infectious disease.
4- Vaccines stimulate the body’s own immune system to protect the person against subsequent disease.
5- Immunity is the capability of multicellular organisms to resist harmful microorganisms from entering their cells.
6- Immunity is the ability of an organism to resist a particular infection or toxin by the action of specific antibodies or sensitized white blood cells.
7- Immunization is the action of making a person or animal immune to infection.
8- Vaccines strengthen the immune system.
Which pair of structures would provide a positive identification of an animal cell under a microscope? plasma membrane, A. endoplasmic reticulum B. Golgi apparatus, mitochondrion C. lysosome, flagellum D. cell wall, chromatin
Answer:Lysosome Flagellum
Explanation:
Answer:
c. lysosome, flagellum
Explanation:
k12 I took the test
climbing organ of betel plant
Answer:
The climbing organ of a betel plant: Is a Root
The climbing organ of the betel plant is a root. The correct option is b).
What is the betel plant?
A betel plant is of the family Piperaceae. The plant is evergreen and has green, shiny heart-shaped leaves. It is used as a mouth freshener in India and is widely eaten.
The roots that help the plant climb up are called adventitious roots. so they are the plant's climbing organs.
Thus, the correct option is b) Root, regarding the climbing organ of the betel plant.
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The options are attached below:
a) Tendrils b) Root c) Stem d) Leaves.
what might be reasons why galileo galilei failed to discorve a cell yet wsd the one who invented a microscope
Answer:
Galileo galilei was an astronomer not a biologist.
Explanation:
Galileo galilei failed to discover a cell yet the one who invented a microscope because the Galileo galilei was an Italian scientist who contributes in the field astronomy and mathematics. He was not interested in biology so he was not able to discover the cell in the presence of microscope. Galileo galilei made many theories about the universe and make improvements in the structure of telescope which enables him to study the universe.
A tumor cell with a mutation in Rb can divide in the absence of extracellular signals. A. If the Rb mutation is responsible for the increased cell division, is it likely that Rb is always active or always inactive
Answer:
The Rb will always stay active
Explanation:
The Rb, undergoing a mutation that promotes cell proliferation, the cells will proliferate excessively, either benignly or malignant, forming a tumor structure.
The Rb mutation is considered an irreversible process, which will generate an unlimited and excessive growth that is abnormal when compared to the other non-mutated cells.
A population of fish exhibits multiple variations in color, size and mouth structure; however, there does not appear to be any selective advantage for these traits because all individuals are allowed to breed and survive! Which of the following is most likely occurring in this fish population?
Answer:
This population of fish is undergoing the process of Genetic diversity
Explanation:
The phenomenon known as Genetic diversity is described as variation that occurs within a species or community. Individual organisms are unique owing to their genetic makeup. Ample variation within a population, or genetically diverse population, allows it to better survive various sorts of stresses from the environment, ensuring better survival of the species.
Whales have hair, such as whiskers on their head. Land mammals also have hair such as whiskers. Which statement below is NOT
TRUE about whales?
whales and land mammals have a common ancestor
whiskers, like hair, help keep whales warm in the ocean.
whales are related to land mammals
whales and land mammals share some DNA
whiskers, like hair, help keep whales warm in the ocean. is incorrect
Which form of bacteria is matched correctly to its description? spirillum—has a rod shape and exists in chains or alone coccus—can cause MRSA and has a round shape coccus—can cause acne and has a spiral shape bacillus—has a spherical shape and can form clusters
Answer:
coccus—can cause MRSA and has a round shape
The form of bacteria is matched correctly to its description is coccus, which can cause MRSA and has a round shape.
What are the forms of bacteria?Bacteria is a microscopic living organism that can exist as free-living or in colonies.
Based on shape, bacteria can exist in the following forms:
spherical shaped (cocci)rod shaped (bacilli)spiral shaped (spirilla)comma shaped (vibrios) corkscrew (spirochaetes)Therefore, the form of bacteria is matched correctly to its description is coccus, which can cause MRSA and has a round shape.
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The famous radiation of Galapagos finches from the common ancestor species on the Western coast of South America is probably a result of
Answer:
Adaptive evolution
Explanation:
The radiation of finches in the Galápagos archipelago is the result of the natural selection process described by Darwin as adaptive evolution. Evolution is the process for which the organisms better adapted to its environment have more chances to survive and to reproduce, thereby leaving more offspring in the next generation.
Moreover, adaptive evolution refers to the mechanism for which species evolve by the emergence of advantageous mutations that are fixed through positive selection, thereby favoring the phenotypes that have higher adaptive fitness.
Chorionic villi are more prolific Select one: a. Adjacent to the yolk sac b. Opposite the cervical os c. Near the implantation site d. Adjacent to the uterine fund us
Answer:
Adjacent to the yolk sac
Explanation:
Chorionic villi are microscopic and fingerlike projections found near the placenta which contain capillaries, increase surface area of blood that allow blood to flow and transfer nutrients from the mother to the fetus. The chorionic villi is adjacent to the yolk sac because it developed from the yolk sac, villi can extend and contact maternal blood vessels thereby nourishing the embryo and transfering nutrients from the mother to the fetus.
ASAP You are observing proteins in a lab for an experiment. During transport, they have started to unwind and lose their shape. You notice long strands wound into alpha helices. What level of structure are the proteins in? A. Quaternary B. Primary C. Secondary D. Tertiary
Answer:
C. Secondary
Explanation:
In proteins, the structure of local segments can be arranged into three different three-dimensional formations: alpha helices (α-helix), beta sheets (β-strand) and omega loops. An alpha helix is the most common secondary protein conformation because it has low-energy and a stable arrangement. The α-helix is formed by the interaction between amino acids of every backbone N−H hydrogen bonded with the backbone C=O group of the corresponding amino acid residue in the polypeptide chain. The α-helix motif is very common in transmembrane segments of proteins that cross the lipid bilayer.