Answer:
This begins with the gradual breaking down of the food in the mouth, by grinding the food substances with the teeth this is mastication, and the secretion of saliva, which moisten the food, soften it so that the salivary amylase enzyme, carried out the mechanical digestion.
Swallowing is a wavelike muscular contraction which involve the contraction of the longitudinal and circular muscles of the oesophagus, which pushes the bolus down to the stomach.
The food pass Oropharynx. While the epiglottis prevents the bolus from entering the trachea.
This is followed by the rolling up of the tongue, the pushing the broken down food now chyme towards the back of the mouth, pressing it against the soft palate. At this stage a bolus is formed.From here it is pushed into the throat,where it is pushed down the oesophagus by peristalsis.
Explanation:
what causes water to enter plant roots from the soil?
a. water concentration in root hairs and the soil are equal.
b.water concentration in root hairs and the xylem are equal.
c.water concentration in root hairs is higher than in the soil
d.water concentration in root hairs is lower than in the soil
Answer:
D
Explanation:
The cell sap is hypertonic to the soil therefore an osmotic gradient is formed and the roots therefore intake water
What causes water to enter plant roots from the soil is mainly because the concentration of water in the root hairs is lower than in the soil. The correct option would be D.
Water moves from the soil into the root by osmosis.Osmosis is the movement of water molecules from the region of high water potential or concentration to the region of low water potential or concentration.Hence, water will enters the plant roots from the soil because the water potential in the soil is more than that of the root airs.
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Why does the growth of dodder eventually lead to the death of a host plant?
Answer:
it deprives the plant of nutrients
Explanation:
which fungi group is known as the zygote fungi and produces spores in zygos[orangia?
Answer:
zygomcota
Explanation:
discovered in Winter 1881
Sensory information from proprioceptors about joint and muscle positions are carried to the brain by the: Sensory information from proprioceptors about joint and muscle positions are carried to the brain by the: anterolateral system (spinothalamic tracts). vestibulospinal tract. reticulospinal tract. spinocerebellar tracts.
Answer:
Spinocerebellar tracts.
Explanation:
Spinocerebellar tracts are afferent neurons that transmit proprioceptive information from the peripheral nervous system ( muscles and joints propricetors) to the cerebellum. It originated from the spinal cord and end at the cerebellum. It carry unconscious proprioceptive sensory information from the muscles, organs to the cerebellum.
Arrange the followings so that they accurately display the anatomical terms from bottom to top in order of the deepest to most superficial.
a. hair shaft
b. hair bulb
c. dermal papilla
d. hair root
e. hair matrix
Answer:
The correct arrangement from starting with the one at the bottom and/or deepest to the most obvious to the eye is:
E) Hair Matrix (Deepest)
C) Dermal Papilla
B) Hair Bulb
D) Hair Root
A) Hair Shaft (Most superficial)
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What's the difference between Columnar Epithelium and Glandular Epithelium. (Pls answer fast T_T)
Answer:
glandular epithelium are specialized for secretion. lining epithelium simply lines organs like the stomach. ... Endocrine glands release substances within the body and exocrine glands release substances outside the body.
Simple columnar epithelia are tissues made of a single layer of long epithelial cells that are often seen in regions where absorption and secretion are important features. The cells of this epithelium are arranged in a neat row with the nuclei at the same level, near the basal end ...
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The tometti fossils are most related to?.......
Answer:
the tometti fossil are most related to ostriches or to crocodiles.
Are zoos beneficial to animals
Note:This is a Debate
Answer:
I think they are not beneficial to animals
Explanation:
because
1.they are not free to live for themselves , find mates and have children
2.they are there so as the people can get money
Answer:
Proposition:
Zoos are beneficial for animals because :
- Keeps them away from poachers
- Medical care is provided
- protects them from predators
Opposition:
- in captivation most animals get depressed
- for doing tricks they are left starving
- they are kidnapped from the jungles away from the parents
(THE POINTS DEPEND ON THE TYPE OF DEBATE (THW;THBT;THR;THS))
(I have given it in general)
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Caregiving has been associated with:____________
a) a stronger immune response.
b) a higher percentages of T cells.
c) underproduction of proinflammatory cytokines.
d) overproduction of proinflammatory cytokines.
You want to estimate the number of canvas backs (a type of duck) at the Sacramento Wildlife Refuge. In two days you capture 200 canvas backs, mark all of them and release them. One month later you capture another 200 canvas backs, of which 100 were marked by you last month. Calculate an estimate for the population size of canvas backs.
A. 400
B. 100
C. 200
D. 300
E. 600
Answer:
Option A 400 individuals
Explanation:
Using this formula, we can estimate the population size of the canvas backs as this is a capture-recapture method.
N = (MxC) / R
Where N = estimated Number of individuals in the population
M = number of individuals captured and Marked = 200
C = total number Captured the second time (with and without a mark) = 200 and
R= number of individuals Recaptured (those with a mark) = 100
Thus, we have
N = (MxC) / R
= (200 x 200) / 100
= (40,000) / 100
= 400 individuals.
In his experiments with different competing pairs of Paramecium species, Gause found that sometimes both species persisted and sometimes only one species did. Which hypothesis did Gause propose in order to explain the cases in which both species persisted?
Answer: The options are not given, here are the options.
A. One species is much better competitor than the other.
B. Periodic disturbances allow for coexistence.
C. Two species tended to use different resources.
D. The two species experienced interference competition and not exploitative competition.
The correct option C.
Two species tended to use different resources.
Explanation:
From Gause experiments on competing paramecium pairs, He found out that most times both species persisted and sometimes only one did because the two species uses different resources.
Organisms normally compete for limited resources in order to survive and one intend to compete well while other suffer. Both in the case of competing paramecium pairs, the pair use different resources which make the to persist and survive well. Once the resource of one finishes, the other one will persist because it is still surviving on its available resources.
Some fish have bony fins. If the body of water they are in dries out, these fins can be used to help the fish "walk" to another body of water. In this context, bony fins are an example of ________. A) an exaptation B) an adaptation C) a macroevolutionary event D) pedomorphosis
Answer:
A) an exaptation
Explanation:
Type the correct answer in the box. Spell all words correctly.
What is the correct term for splitting an atom to release nuclear energy?
Splitting the nucleus of an allom to release energy is referred to as nuclear
Answer:
The splitting of a uranium atom releases energy. This process is called “nuclear fission”, since the centre of an atom is called its nucleus. When a uranium atom splits it gives off more neutrons, which can then split more atoms, and so the energy level rapidly multiplies
Explanation:
The splitting of a uranium atom releases nuclear energy by the process called nuclear fission, releases more neutrons, which can then split atoms, and energy level multiply rapidly.
What is nuclear energy ?The Energy is stored in the core of atom called nuclear energy.
The mass of an atom refers to the mass of nuclear elements like total mass of neutron and proton present in it.
Nuclear reaction can either be nuclear fission or fusion which releases the nuclear energy.
The process in which atoms combine to form a larger atom called nuclear fusion, while the process in which the the breakdown of atoms with the release of energy called nuclear fission.
Nuclear power plants produce energy by nuclear fission where as Sun produces energy by nuclear fusion.
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Some theories are developed from repeated testing of a single hypothesis. Cell theory, germ theory, and the theory of evolution all have developed from the testing of multiple related hypotheses. Which statement best explains why some theories develop this way?
Answer:
Each experiment reveals a different piece of information that is needed to develop the theory.
Explanation:
Answer:
Each experiment reveals a different piece of information that is needed to develop the theory.
Explanation:
(e) Predict the effect of the removal of the final electron acceptor on the rate of carbon fixation by the chloroplast. Justify your prediction
Answer:
The ATPs produced during Chemeiosmosis, in the chloroplast is needed during Calvin cycle to fix carbon for production of CHO, protein and fats during conversion of 3C-glyceride phosphate(GP) to 2C- triose phosphate.(TP) .
The ATPs is needed for this reduction to take place in the presence of NADPH(which is oxdized to NADP).
Therefore, if the final electron acceptor is removed, there will be no electron transport chains which generated the PMF, for pumping H+ across into the thylakoid membrane of the chloroplast, to generate the electrochemical gradients, needed for the energy for ATPase synthase enzymes,to synthesize ATPs production.
Therefore, the removal of the electron acceptor (oxygen) leads to stoppage of electron transport chain, and hence loss of ATP s, and therefore, no Carbon fixation as CHO, or protein, or fats.
Explanation:
Which of the following statements is true?
A. All matter is made of the same 10 elements.
O B. Every species is made of different elements.
C. All living things are made of the same elements.
D. Every organism is made of different elements.
SUBMIT
_________15. Which one of the following feature is common in C3, C4 and CAM photosynthesis?
A. Fix CO2 twice in their cycle
B. Produce oxaloacetaate as their stable produce
C. Fixation of CO2 occurs by mesophyll cells
D. Their bundle sheath having chloroplast with no thylakoids
A. Fix CO2 twice in their cycle
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what type of epithelium has dome shaped on the apical surface?
Answer:
Transitional epithelium has dome shaped cells on the apical surface.
Answer:
Transitional epithelium
Transitional epithelium has dome shaped cells on the apical surface. Pseudostratified epithelium is a type of epithelium that has cells which all touch the basement membrane. Pseudostratified epithelium is only one cell layer thick.
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Explanation:
Which is a negative impact on the earth caused by human population growth?
Answer:
Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.
Explanation:
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Answer:
Destruction of Natural Habitats
Explanation:
If a 160lb individual has 28% body fat how much of their body weight is fat in lbs.?
Answer:
44.8 lb
Explanation:
160 lb * 0.28= 44.8 lb
Answer:
44.8 lb
Explanation:
160 x 0.28 = 44.8
List 3 areas other than pregnancy and childbirth where genetic counselors provide help.
The feces of birds and mammals can also be used to assess ecosystem health. Research this methodology and provide two examples of animals used for these studies and the types of materials that are identified in their feces
Answer:
Birds and leopard
Explanation:
It has been researched and discovered that the feces of birds and animals can be used to determine the state of health of an ecosystem.
For example, it has been discovered that hormones and other substances are excreted through urine and feces. And researchers have discovered from the feces of leopards, that a leopard that has cave or trees where it can hide from hunters are not likely to be stressed out like the one that does not have.
The immediate pressure of necessity has brightened their
intellects, enlarged their powers, and hardened their
hearts. And looking across space with instruments, and
intelligences such as we have scarcely dreamed of, they
see, at its nearest distance only 35,000,000 of miles
sunward of them, a morning star of hope, our own warmer
planet, green with vegetation and grey with water, with a
cloudy atmosphere eloquent of fertility, with glimpses
through its drifting cloud wisps of broad stretches of
populous country and narrow, navy-crowded seas,
-H. G. Wells, The War of the Worlds, 1898
What can you infer about the narrator from this passage of The War of the
Worlds?
O A. He is smart and educated.
O B. He doesn't care about Earth.
C. He believes in God.
O D. He is afraid of the Martians.
Answer: D- he’s smart and educated
Explanation:
2. Is salt water alkaline or acidic?
Answer: hh
Explanation:hhh
carbohydrates are used for what
Carbohydrates are used for short term energy. It also stores energy.
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Function of carbohydrates
Carbohydrates provide fuel for the central nervous system and energy for working muscles. They also prevent protein from being used as an energy source and enable fat metabolism, according to Iowa State University. Also, "carbohydrates are important for brain function," Smathers said.
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Which statement best describes the phases of the Moon?
•During the waxing and waning phases of the Moon, the amount of light received by the Sun changes.
•During the waning phase of the Moon, less of the Moon's near side is lít each night
•During the waxing phase of the Moon, less of the Moon's near side is lit each night.
•During both the waxing and waning phases, the Moon is not visible to people on Earth
Answer:
During the waning phase of the Moon, less of the Moon's near side is lít each night
Explanation:
Phases of the moon are different ways the moon appear on the Earth. As moon orbit the Earth, half of the moon that faces the Earth will be lit up. There are different phases of moon which are full moon, quarter moon, waning crescent moon, waning gibbous moon, e.t.c.
A waxing crescent moon is when the moon look like crescent and it increases in size.
A waning gibbous moon occurs when more than half of the lit portion of the Moon can be seen and the shape reduce in size . It occur between the full and quarter moon.
Answer:
Explanation:
The night sky with a small sliver of the left side of the moon visible.
In this photo, this phase of the moon is called
.
The next phase will be
.
About 27 days from now the phase will be
.
which is it ????
Some parts of the worlds rainforests haven’t been studied closely, and may contain species of plants which have benefits for humans. ‘Suggest and explain uses of stem cells taken from the meristem of a new species of plant.’
To determine the similarity of stem cells of one species of plant with that of another: By determining the similarity between the stem cells taken from two different species, it can be identified whether there is a possibility of clowning, of giving birth to new and improved species of plants that are beneficial for mankind, or that of interchanging the stem cells to boost up or slow down the growth of the plants. To determine whether the stem cells can be altered and reintroduced to make the plants grow in a specified manner: By altering and modifying the stem cells and reintroducing them back again, it is possible to restrict the growth of the plant to a specific size or shape. This trait of the stem cells can be used to make the plantation possible in compact areas as well as to grow the plants in the desired shapes.
To determine whether the speed of division of cells at the roots and appendages of the plant can be modified: By restricting or boosting the speed of the division of meristem cells using modified stem cells, the plant can be made to grow faster in a specific season and slower in another. This feature can be used to lower the vulnerability of the plant species towards various natural weathering actions.
Stem cells extracted from the meristem can be precisely examined for their effectiveness against illnesses that harm portions of the plants such as the roots, shoots, and appendages to ascertain the resistance against various plant diseases.
What is meristem?They can thus also be utilized to rebuild the damaged plant tissues if the newly discovered species becomes extinct.
It can be determined whether there is a chance of clowning, or of giving birth to new and improved species of plants that are beneficial to mankind.
Therefore, Stem cells extracted from the meristem can be precisely examined for their effectiveness against illnesses that harm portions of the plants such as the roots, shoots, and appendages to ascertain the resistance against various plant diseases.
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A female fly that has miniature wings and sepia eyes is crossed with a male that has normal wings and is homozygous for red eyes. The F1 are intercrossed to produce the F2. Give the phenotypes and their proportions expected in the F1 and F2 flies from this cross.
Answer and Explanation:
The gene that expresses the size of the wing is X-linked. The dominant allele expresses long wings, XM, while the recessive allele expresses miniature wings, Xm. The gene that expresses the color of the eyes is autosomal. The dominant allele expresses red color, S, and the recessive allele expresses sepia color, s.A female fly that has miniature wings and sepia eyes (XmXm ss) is crossed with a male that has normal wings and is homozygous for red eyes (XMY SS).
The F1 are intercrossed to produce the F2.
1º Cross:
Parental) XmXm ss x XMY SS
Gametes) Xms Xms Xms Xms
XMS XMS YS YS
Punnet Square) Xms Xms Xms Xms
XMS XMXmSs XMXmSs XMXmSs XMXmSs
XMS XMXmSs XMXmSs XMXmSs XMXmSs
YS XmY Ss XmY Ss XmY Ss XmY Ss
YS XmY Ss XmY Ss XmY Ss XmY Ss
F1) 1/2 or 50% of the progeny are females and the other 1/2 or 50% are males
100% of the females (1/2 or 50% of the progeny) are long-winged and red-eyed
100% of the males (1/2 or 50% of the progeny) are miniature.winged and red-eyed.
2º Cross:
Parental) XMXm Ss x XmY Ss
Gametes) XMS XMs XmS Xms
XmS Xms YS Ys
Punnet Square) XMS XMs XmS Xms
XmS XMXm SS XMXm Ss XmXm SS XmXm Ss
Xms XMXm Ss XMXm ss XmXm Ss XmXm ss
YS XMY SS XMY Ss XmY SS XmY Ss
Ys XMY Ss XMY ss XmY Ss XmY ss
F2) 8/16=4/8=1/2 or 50% of the progeny are females and the other 1/2 or 50% are males
Females (8/16):
3/8 of the females are long-winged and red-eyed, XMX- S-1/8 of the females are long-winged and sepia-eyed, XMX- ss3/8 of the females are miniature-winged and red-eyed, XmXm S-1/8 of the females are miniature-winged and sepia-eyed, XmXm ssMales (8/16):
3/8 of the males are long-winged and red-eyed, XMY S-1/8 of the males are long-winged and sepia-eyed, XMY ss3/8 of the males are miniature-winged and red-eyed, XmY S-1/8 of the males are miniature-winged and sepia-eyed, XmY ssNote: The symbol "-" means that in its place might be a recessive allele or a dominant allele. For example, S- means that it might be SS or Ss.
Multiple alleles____ can interact how with traits
1. An oak tree is adapted to grow in a wood. Which of the following is NOT
true?
A)It has a large root system to absorb water and minerals
B)It has a large root system to anchod the tree
C)It has plenty of leaves to absorb sunlight
D)It loses its leaves in autumn to save food
Answer:
(B) it has a large root system to anchored the tree
