Answer and Explanation:
Regarding genetics, the results of the study show that the mother's genetic material does not influence the behavior of rats in times of stress or in the biological responses of rats to these stressful moments. This is because the mice inherited their mothers' genes, but did not show the same results in a stressful situation when they were raised with different mothers.
Regarding epigenetics, however, we can see that the mothers' behavior in relation to the care of rats managed to provoke epigenetic changes that prevented or stimulated the expression of genes linked to stress, in these rats. The rats that were raised with attentive mothers showed a low expression of stress-linked genes, regardless of the biological mother they had. In addition, it is possible to notice that this modification is permanent, since the rats presented this same type of response throughout their lives.
Yeast is added to bread dough before baking. After several minutes, the bread dough rises. Use your experiment to explain how respiration of yeast is important for the baking process.
Answer:
The purpose of any leavener is to produce the gas that makes bread rise. Yeast does this by feeding on the sugars in flour, and expelling carbon dioxide in the process.
While there are about 160 known species of yeast, Saccharomyces cerevisiae, commonly known as baker's yeast, is the one most often used in the kitchen. Yeast is tiny: Just one gram holds about 25 billion cells. That amount of fungi can churn out a significant amount of carbon dioxide, provided it has the simple sugars it uses as food. Fortunately, yeast can use its own enzymes to break down more complex sugars—like the granulated sugar in the activity below—into a form that it can consume.
Make a yeast-air balloon to get a better idea of what yeast can do
Yeast is a unicellular fungus which undergoes anaerobic respiration to produce ethanol and carbon dioxide gas.
How does yeast fermentation work in bread-making?In a process known as fermentation, yeast consumes the sugar present in the dough to produce carbon dioxide and alcohol.The dough is kept in a warm area throughout the baking process.Fermentation occurs as a result of heat.However, if the temperature is too high, the yeast is killed during the cooking process.As the dough ferments, carbon dioxide is created and trapped as microscopic air bubbles. The expansion of carbon dioxide during baking allows the bread to rise higher. During the bread-baking process, the alcohol created during fermentation evaporates.This is how yeast fermentation plays a vital role in the baking process.
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The result of genes controlling mitosis not working properly is:
a. diabetes
b. high blood pressure
c. dyslexia
d. cancer
Answer:
d
Explanation:
This leads to unnecessary replication and out-of-control cell and tissue growth
11. Which of the following is an example of a pigment?
a. Glucose
c. Chlorophyll
b. Pyruvate
d. NADPH
Chlorophyll is an example of a pigment. Option C is correct.
The chlorophyll is the green pigment in the leaves. The chlorophyll absorbs the red and blue wavelengths of light from the sun. As a result, the light reflected from the leaves is less red and blue, making it appear green. Chlorophyll molecules are large.
Chlorophyll is made up of one central magnesium atom, surrounded by a ring of nitrogen-containing structures called porphyrins; attached to this ring is a chain of long carbon-hydrogen side chains called phytol chains.
The biosynthesis pathway of chlorophyll b involves the same enzyme as that of chlorophyllide.
Therefore the correct option is option C.
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What system is interacting with the digestive system to cause perstalsis?
Answer:
The process of peristalsis is controlled by the medulla oblongata. Esophageal peristalsis is typically assessed by performing an esophageal motility study.
Explanation:
Traits are based on improving what primary factor in organisms?
a. behavior
b. anatomy
c. fitness
d. physiology
Fill in the blanks please help!
Female ovaries play two central roles in the female reproductive system: they act as both glands and gonads Acting as glands, the
ovaries produce several female sex hormones.
controls the development of the mammary glands and uterus during
puberty and stimulates the development of the uterine lining during the menstrual cycle. What is this hormone produced by the
ovaries?
es )
A)
estrogen
B)
progesterone
testosterone
D)
human chorionic gonadotropin (HCG)
You need to borrow a pencil from a friend who is sick with a cold- she recently sneezed into her hands before passing the pencil to you. before you eat your lunch you decide to wash your hands. you never get the cold she was sick with
Answer:
You never get the cold but you can carry the cold to someone else
Explanation:
This makes you a carrier not a patient
What is true of the most recent ice age?
O A. It made the dinosaurs extinct.
OB. The continents were much closer together than they are now.
O c. It occurred during the Mesozoic era.
O D. Sea levels were 300 feet lower than they are now.
16. In the process of digestion, food gets ready to exit the body. Which is another body system that aids in waste removal?
A. Excretory
A. Excretory
B. Endocrine
B. Endocrine
C. Skeletal
C. Skeletal
D. Nervous
Answer:
A) Excretory
Explanation:
A good way to remember is Ex - like exit so it will leave the body.
Answer:
A. Excretory
Explanation:
Bile is stored in the gallbladder until it is needed. The pancreas makes enzymes that help digest proteins, fats, and carbs. It also makes a substance that neutralizes stomach acid. These enzymes and bile travel through special pathways (called ducts) into the small intestine, where they help to break down food.
Which of the following types of interference will occur when the pulses in the figure meet?
A
no interference
B
constructive interference
C
destructive interference
D
total interference
When new cells are formed through the process of mitosis, the number of chromosomes in the new cells
Answer:
remains the same as in the parent cell
Explanation:
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Find locally available materials that can be used in cleaning of the various body parts of the body.
Answer:
In the body, a water purifier may encourage everyone to drink more good old ... It can literally clean almost anything it touches, so stock up and enjoy its many uses. ... To learn more about your health and wellness, see your local chiropractor at ..
Explanation:
In the body, a water purifier may encourage everyone to drink more good old ... It can literally clean almost anything it touches, so stock up and enjoy its many uses. ... To learn more about your health and wellness, see your local chiropractor at ..
3. What is the scientific term for a group of interacting individuals of the same type, living in the same area at the same time?
Answer: The scientific name is called POPULATION.
Explanation:
In basic ecological studies, POPULATION is defined as a group of interacting individual of the same type or species, living in the same area or habitat and at the same time.
Furthermore, to study a population of organisms, the different characteristics seen include:
--> Population size: This is important as it affects the survival of a given species in a habitat. A small population may be easily wiped out by events such a fire but a large population stands a better chance of survival.
--> Population frequency: This is simply how often the species occurs at different sites in a habitat.
--> Population density: this is the average number of individuals of a species per unit area of the habitat.
--> Percentage cover: This is the area of ground occupied by a given species in its habitat.
--> Distribution: This is the way in which individuals of a particular population are arranged in a habitat. They may be clumped, evenly spaced or randomly spaced.
Complete the following sentence.
To reduce the chances of resistant insects evolving from overexposure to BT-modified crops, farmers producing these crops are required to also plant ________varieties of the same crops.
unmodified
To reduce the chances of resistant insects evolving from overexposure to BT-modified crops, farmers producing these crops are required to also plant ________varieties of the same crops.
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6. _________________ happens when solid material separates out of a liquid, usually when the liquid evapo- rates.
a. Weathering
b. Erosion
c. Sedimentation d. Precipitation
Answer:
Those sediments can be formed from the weathering and erosion of preexisting rocks. Sedimentary rocks also include chemical precipitates, the solid materials left behind after a liquid evaporates. ... For example, the mineral olivine crystallizes out of magma at much higher ... Dana Desonie, Ph.D.
Explanation:
Answer:
Sedimentation
Explanation:
Sedimentation is the tendency for particles in suspension to settle out of the fluid in which they are entrained and come to rest against a barrier.
Hope this helped!!!
14. Which animals would best fill in the blank for this food chain? Plankton → __________ → crab a. The seaweed b. The small fish c. The starfish d. The shark
Answer:
c
Explanation:
plankton and crabs aren't technically fish, therefore eliminate b and d. seaweed would not progress to crab, therefore starfish is the correct answer.
A virus has wiped out the grasshopper population in the area. What effects to the ecosystem will most likely occur?
Answer:
Those who prey on grasshoppers will have their population decline while the grass population will rise.
Explanation:
Organisms need food to survive. If their food is gone, they won’t thrive as well. This isn’t saying they’ll go extinct, as they may have other food sources, but life will be harder with one food source gone. Since grasshoppers eat grass, the grass population will rise some due to a lack of predation. Hope it helps :)
Explain in a paragraph how speed and velocity impact blood spatter
Answer:
The force of the blood hitting a surface for medium velocity blood spatter is between 5 and 100 feet per second. This causes the droplets of blood to be smaller in diameter, and more like a spray. High velocity blood spatter: ... This causes the pattern of the blood to be similar to a fine spray.
Explanation:
Changes in a population of elk are shown in the graph below.
What is best represented by the letter X?
A:The average life span
B:Extinction
C:Biodiversity level of the habitat
D:Carrying Capasity
Answer:
Carrying capacity
Explanation:
Section X represents the maximum population size that the environment can support.
Changes in a population of elk are shown in the graph given. The best representation by the letter X is the carrying capacity of the population. Thus, the correct option is D.
What is Carrying capacity?The carrying capacity of an environment is the maximum population size of a biological species which can be sustained by that specific surrounding environment, it is given the food, habitat, water, and other resources that are available.
Carrying capacity can be defined as the environment's maximal load, which in population ecology corresponds to the particular population equilibrium of that area, when the number of deaths in a population equals the number of births as well as the immigration and emigration of individuals.
The effect of carrying capacity on the population dynamics is modelled through a logistic function. Carrying capacity is applied to the maximum population which an environment can support in the ecology, agriculture and fisheries.
Therefore, the correct option is D.
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Even though the Sun contains 99% of the mass of the solar system, the Moon revolves around the Earth. Why doesn’t the Moon revolve around the Sun, which has much more mass than the Earth?
a) unicellular prokaryotes that live in dust Archaebacteria_____ b) unicellular eukaryotes that live in pond water Archaebacteria__________ c) multicellular eukaryotes that live all over the planet and consume food _Animalia___________ d) unicellular prokaryotes that live in volcanic ash and other inhospitable environments Archaebacteria _____________________ e) multicullular eukaryotes that have cell walls and are heterotrophic ______________________________ f) multicullular eukaryotes that have cell walls and are autotrophic ______________________________
Answer:
The fill in the blanks are as follows:
a-unicellular prokaryotes that live in dust are Eubacteria.
b-unicellular eukaryotes that live in pond water are Protista.
c-multicellular eukaryotes that live all over the planet and consume food are Anamalia.
d-unicellular prokaryotes that live in volcanic ash and other inhospitable environments are Archaebacteria.
e-multicellular eukaryotes that have cell walls and are heterotrophic are Fungi.
f-multicellular eukaryotes that have cell walls and are autotrophic are Plantae.
Explanation:
By looking for the definitions of the different types of eukoaryotes and prokaryotes, the fill in the blanks are correctly completed.
which of the following statements best decribes how proteins and enzymes move within a cell?
a. the movement of proteins and enzymes within a cell is facilitated by membrane receptors.
b. the movement of proteins and enzymes within a cell is facilitated by special organelles called transport receptors.
c. the movement of proteins and enzymes within a cell is facilitated by intracellular receptors.
d. the movement of proteins and enzymes within a cell is facilitated by special organelles called magneto receptors.
There are two types of vitamins: , which are stored in the liver (excess of them becomes toxic), and , which are excreted in the urine.
Answer:
I think these will be the fat soluble vitamins .....the A,D,E,K
Explanation:
The liver stores vitamin A, D, E, K and B12. The first four of these are all fat soluble. This means that the bile secreted during digestion is essential for absorbing them so that the body can use them. If bile production is compromised by liver damage, the proper absorption of these vitamins may be affected.
help I want to know if I am correct?
Answer:
you are right. the answer is good. congrats.
Answer:
yes it's correct
Explanation:
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WILL GIVE BRAINLIST!!! How are population increases affect water resources in Texas?
In your own words, how does the cost of making biofuel from microalgae compare to the cost of making fossil fuels?
Answer:
Biofuels like fuel from microalgae are very costly as compared to fossil fuels.
Explanation:
The cost of biofuels is too high as compared to that of fossil fuel. For instance,
the cost of 1 gallon of algal fuel is $32.81 per gallon while cost of diesel is $2.9 -3.2 per gallon.
However, biofuels are very environment friendly as compared to that of fossil fuels.
Which type of movement of Earths crust caused these layers of rock to Deform?
A. Tilting of a plate
B. Sinking of a plate
C. Diverging of plates
D. Converging of plates
Answer:
D. Converging Of Plates
Which of the statements is correct regarding water potential in plants
1. Water moves from a low water potential to a high water potential
2. Water moves from a. high water potential to a low water potential
3. Water potential in the leaves of trees is higher than the water potential in the roots of trees
What is a DNA replication?
Answer:
DNA replication is the process by which DNA makes a copy of itself during cell division.