Answer:
Lignin.
Explanation:
The structural integrity of plant spores is lignin that is present in many parts of the plant. This lignin provides hardness to the plant body which help them to stand the plant erect. If this lignin is not present in the plant body the plant will not stand erected. This lignin is present in large amount in the stem of plant body so that's why the lignin provides structural integrity to plant spores
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Answer:
Step 2: The right ventricle pumps the oxygen poor blood to the lungs via pulmonary valve. Step 3: The left atrium receives oxygen -rich blood and pumps it to the left ventricle. Step 4: The left ventricle pumps the oxygen-rich blood via aortic valve, submitting this blood through the entire body.
Explanation:
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Answer:
1.In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species? are related and gradually change over time.
2.Survival of the fittest is a simple way of describing how evolution (the process by which gradual genetic change occurs over time to a group of living things) works. It describes the mechanism of natural selection by explaining how the best-adapted individuals are better suited to their environment.
which of the following structures helps our sense of balance
Answer:
D answer is correct
Explanation:
semi circular helps our sense of balance
Answer:
eardrum
Explanation:
The ear is a sensory organ that picks up sound waves, allowing us to hear. It is also essential to our sense of balance: the organ of balance (the vestibular system) is found inside the inner ear. It is made up of three semicircular canals and two otolith organs, known as the utricle and the saccule
A desert region would be most likely to experience what type of weathering?
A. Exfoliation
B. Biological
C. Sedimentary
D. Freeze-thaw
Answer:
C, Sedimentary
Explanation:
Sedimentary weathering is rocks that are the product of the erosion of existing rocks, most commonly occurring in a desert region due to the hot, dry weather, along with the many obvious rocks there.
Identify the following by typing (a) for mitosis or (b) for meiosis on the line before the statements: _____ produces 4 unique gametes _____ begins with a somatic cell _____ produces only 2 identical cells _____ has only one nuclear division _____ happens in the testes and ovaries _____ daughter cells are haploid _____ has two nuclear divisions _____ daughter cells are diploid
Answer:
b - produces 4 unique gametes
a - begins with a somatic cell
a - produces only 2 identical cells
a - has only one nuclear division
b - happens in the testes and ovaries
b - daughter cells are haploid
b - has two nuclear divisions
a - daughter cells are diploid
Explanation:
Mitosis is a kind of cell division that involves the formation of two daughter cells, which are genetically identical and have the same number of chromosomes as their parent cell (diploid). Mitosis occurs in body or somatic cells for repair and multiplication. Mitosis involves only one nuclear division.
Meiosis, on the contrary, involves formation of four daughter cells that are genetically different from the parent cell and have a reduced chromosomal number (by half). Meiosis occurs in reproductive cells like tested or ovaries. Meiosis occurs in two nuclear divisions.
Which type of protein would more likely be able to function as a channel through the plasma membrane
Answer:
Aquaporins
Explanation:
Aquaporins are the channel proteins that is present in the membrane of the cell which allow water to cross the membrane very quickly. This aquaporins play an important roles in plant cells, red blood cells, and certain parts of the kidney where this protein minimize the amount of water lost as urine. Without this protein, the diffusion of water across the cell membrane is not possible very quickly.
How many taxa or levels exist in the phylogentic?
a)7
b)4
c)6
d) 8
What concept includes the limiting factors that describe the zonation of flora and fauna along an elevational transect
Answer:
i dont know
Explanation:
because i have drop biologyExplain the evolution of altruism.
Answer:
Altruistic behavior, such as sterile worker ants caring for the offspring of their queen, evolves only between related individuals through what is known as kin selection — or so many evolutionary biologists have thought since the 1960s.
After you eat lunch, nerve cells in your stomach respond to the distension (the stimulus) resulting from the food. This is best described as a mechanism between:
Answer:
stimulus, control center
Explanation:
The control center is the main nervous system of the brain that is used to carry out different sensory, the motor and integration of data.
The stimulus control is the behavioral control that is described as the situations where behavior is triggered by the presence or the absence of any stimulus. Stimulus is the functional reaction in a tissue or any organ.
In the context, the nerve cells in the stomach responds to the stimulus that results from the foods after eating food is a mechanism between the stimulus and the control center.
In a population of wild bees, a mutation resulted in slightly larger wingspan in some of the bees. This larger wingspan made the bees more efficient in their flights to flowers to collect nectar. Thus, these bees became more successful. This trait was passed on to offspring, and eventually the larger wingspan variety of bee replaced their smaller-winged relatives completely. It could be said that ____ favored the bee with the larger wingspan, and so the ____ evolved
Answer:
The correct answer is - natural selection, population.
Explanation:
In this case, the wild bees population experienced a mutation which helps in become more eeficient to fight for nector. This bees population is more sucessful to other that didnt recieved mutation and this mutation as it is adavtageous.
Natural selection always favored beneficial traits for the organisms to eveolved in generation therefore, these population is more succesful and replaced the short winged bees.
During pulmonary ventilation, relaxation of the diaphragm and external intercostals ________ and air flows out of the lungs. increases the pressure in the thoracic cavity flattens the floor of the thoracic cavity increases the volume of the thoracic cavity expands the rib cage stimulates the phrenic nerve
Answer:
Increases the pressure in the thoracic cavity
Explanation:
During pulmonary ventilation, relaxation of the diaphragm and external intercostals increases the pressure in the thoracic cavity and air flows out of the lungs.
Pulmonary ventilation involves the exchange of air in the body. The exchange mainly takes place between the lungs and the the blood. When the lungs take in oxygen it distributes it to other parts of the body after which the byproduct is expelled in the form of Carbon dioxide.
The diaphragm and intercostal muscles are found close to the chest(thoracic) region such that when air is expelled it produces a similar effect such as relaxation of the diaphragm which also makes the chest muscles go down and exert pressure. This mechanism aids the expulsion of Carbon dioxide from the lungs.
difference between clarias gariepinus and hetrobranchus bidorsalis?
Answer:
The clarias gariepinus or african sharptooth catfish , belongs to the Clariidae family of airbreathing catfishes. They exist in freshwater lakes, rivers, and swamps, as well as man-made environments like oxidation ponds and even urban sewage systems, throughout Africa and the Middle East.
Hetrobranchus bidorsalist, he African catfish, sometimes known as the eel-like fatty fin catfish, is an airbreathing catfish found in Africa. It has a lot in common with the vundu catfish, which is well-known among anglers.
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The California Current is a surface current that carries
water south from polar regions.
Callfornia Current
Which statement best describes how this current affects the climate on
nearby land?
A. It warms the eastern coast of the United States
B. It cools the eastern coast of the United States.
C. It warms the western coast of the United States.
D. It cools the western coast of the United States
Answer:
D
Explanation:
It's located on the west coast and it's carrying water from the cooler polar regions. It cools the western coast of the US.
explain the importance of dimensioning in biology
Answer:
Even if you make a drawing to scale, it would be difficult to determine the exact precision that is needed.
It would be time consuming to measure each of the lines to determine measurement.
The basis for modern part dimensioning is the need for interchangeable parts (being able to buy something off the shelf that fits what you already have)
Explanation
When dimensioning, it is good technique to avoid listing the dimension more than once through out the drawing.
If you need to list a dimension more than once, for accuracy or ease of viewing, you must encase the dimension within a set of brackets.
Answer:
The purpose of dimensioning is to provide a clear and complete description of an object. A complete set of dimensions will permit only one interpretation needed to construct the part. Dimensioning should follow these guidelines. Accuracy: correct values must be given.
Which chloroplast structure increases the amount of surface area that is available for photosynthesis
Answer:
Thylakoid
Explanation:
A thylakoid is a sheet-like membrane-bound structure that is the site of the light-dependent photosynthesis
If constructive interference occurs when two waves are cresting, it will decrease the height of the crest.
True
False
Answer:
True is the answer for your question. Mark me as the brainliest first please.
Explanation:
Answer:
False
Explanation:
I said true because of the other person and it was wrong. Trust me it’s False
Which statement correctly compares nucleid acids and corbohydrates?
Answer:
The correct answer is 4) They both contain carbon, but only nucleic acids contain phosphorous.
Explanation:
nucleid acids and corbohydrates both contain carbon, but only nucleic acids contain phosphorous. Nucleic acid and carbohydrates are essential biomolecules, which are important for the survival of life forms. DNA and RNA comprises the nucleic acid, which posses the genetic information of the living organism.
Identify and describe how bacteria, hormones, and nerves influence the health and activities of the GI tract
Answer:
The GI health is supported by a varied and rich population of bacteria. The GI processes are controlled by the coordinated efforts of the hormonal system and the neurological system. Digestion and absorption together break up diets into bodily nutrients. A healthy GI system requires a balanced diet, sufficient relaxation, and frequent physical activity, to perform best.
Explanation:
Bacteria along the GI tract have a wide range of possible health benefits, including the production of vitamins, ion absorption (Ca, Mg, and Fe), pathogens protection, histologic development, improved immune systems, and fermentation of "no-digestible food" Bacteria have a number of potential functions.
During the digestion and absorption process hormones control the different digestive enzymes, which are secreted in the stomach and bowel. In reaction to the consumption of food, for example, the hormone gastrin induces stomach acid output. The somatostatin hormone prevents stomach acid secretion.
What happens when many water molecules come into contact with one another? Explain.
Answer:
When the oxygen atoms of different water molecules come together, they repel. When the hydrogen atoms of different water molecules come together, they repel.
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True or false? Recent genetic evidence indicates that there may be—in the roots of some plants—a response stimulated by the concentration of water in the soil.
Group of answer choices
False
True
I think it will be false only as I have readed in my sister book FALSE
Answer:
I think the answer is false.
Explanation:
I hope this helps
True or false: Osseous connective tissue is the only tissue type found in bones. True false question. True False
Answer:
False
Explanation:
Which substance is not excreted by the body
Answer:
Saliva
Explanation:
Pesticides are: Group of answer choices Always highly toxic to humans All of the listed answers All synthetic chemicals Always the best weapon against insect pests None of the listed answers
Answer:
Always highly toxic to humans.
Always the best weapon against insect pests
Explanation:
Pesticides are always highly toxic to humans as well as all synthetic chemicals are always the best weapon against insect pests because the chemicals used in these pesticides affect the body structure as well as other mechanism of survival for the insects or pests. The ingredients present in pesticides are highly toxic to humans which leads to the death of human while on the other hand, it is the best weapon used by humans against pest.
In interstitial growth of cartilage ______. Multiple choice question. only new cells are produced only new matrix is produced news cells and new matrix are produced
Answer:
The correct answer is ''news cells and new matrix are produced''
Explanation:
Interstitial growth consists of the production of new layers of cartilage in the inner layer of the perichondrium. This process occurs because chondrocytes meet in the form of small groups, called isogens or cell nests, they are capable of dividing and the cartilaginous matrix is distensible. Daughter cells initially occupy the same gap but as they secrete new intercellular matrix they separate. These daughter cells can divide again, forming so-called isogenic groups, which are frequently found in growing cartilage.
which organsism transform nitrogen to a form this useful to plants? a. bacteria b.animals c.fungi d.humans
Answer:
a. bacteria
Explanation:
There are nitrogen-fixing bacteria whose sole purpose is to transform nitrogen into a form which can be used by our friends called the plants.
Answer:
A. Bacteria
Explanation:
Nitrogen-fixing bacteria are capable of transforming it into fixed-nitrogen particles, that are usable by plants
How does the experiment relate to what you've learned about submersible technology suck as submarines and ROV's?
Answer:
A submersible technology designed to operate the submarines underwater.
Explanation:
We have learned about submersible technology suck as submarines and ROV's is that pumping system is used to remove water from the submarines and ROV's in order to make it lighter. A submersible is designed to push water to the surface. When a pressure switch is turned on, the impeller started to spin drawing water into the pump. The water is then pushed through the pump and brought it to the surface. Due to removal of water, the submarines and ROV's become lighter and they will come to the surface of water.
Which of the following types of stars started out on the main sequence with the largest initial mass?
a, b, c, or d?
Answer:
answer: C
Explanation:
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what are the limitations of using fossil in evolution theory. Please answer