Answer:
Adult humans capable of digesting lactose were selected, thereby this phenotypic trait became common in dairy consuming societies
Explanation:
From the first moment after birth, babies can digest lactose in milk because they produce lactase, which is an enzyme capable of hydrolyzing lactose into glucose and galactose. In human societies that non consume milk products, the level of the lactase enzyme abruptly decreases during the first years of life due to the inactivation of the gene encoding this enzyme (i.e., lactase gene). However, in dairy consuming societies, a genetic mutation in the lactase gene that appeared among early cattle-raising people in Europe was selected, nowadays, this mutation is mostly present (i.e., in a higher frequency) in these societies, thereby adult people is generally adapted to consume lactose-based products.
What type of mutation would result (nonsense, missense, silent,
Frame-Shift)
Answer:
Nonsense missense silent
What is the job of a cell's selectively permeable membrane?
O A
To control materials entering and leaving the cell
O B.
To regulate energy production in the cell
thing
O C.
To create a second layer of rigid support and protection
O D.
To keep mitochondria from using nuclear material
Answer:
A is the right answer
Explanation:
Selective permeability is a property of cellular membranes that only allows certain molecules to enter or exit the cell. This is important for the cell to maintain its internal order irrespective of the changes to the environment.
Can I have brainliest
Which tenet of the cell theory is being demonstrated by the graph below? A.) cells can never be destroyed B.) cells are the smallest unit of life C.) all living things are made of cells D.) cells come from existing cells
Answer:
The cell theory demonstrated by the graph above is that all cells come from pre existing cells.
Which of the following describes the last step in the life of a Large Star? *
A. small star is formed in the center of the shrinking cloud. The star begins to do fusion.
B. Once the Large star expands into a Super Red Giant, it explodes.
C. black hole forms with so much gravity that not even light can escape it.
D. Cloud of gas and dust that starts to shrink because of Gravity.
Answer:
A. small star is formed in the center of the shrinking cloud. The star begins to do fusion
Explanation:
What are some questions that scientists on Earth might study? Choose all that apply.
A. How Weather & Climate systems affect Earth?
B. How can Earthquake be detected?
C. How does light travels through optical fibers?
D. Is water found on other planets?
Answer:
A,B,C
Explanation:
It won't be D. because you would need to study or go to the other planets to answer the question.
Hope this helps!
two types of organisms that appear in the climax community are
Answer:
Plants, animals and, fungi.
Explanation:
Through the process of ecological succession in the development of vegetation in an area over time, have reached a steady state.
Have a great day!
True or false adult stem cells are the best option for healing the widest variety of diseases
Answer:
true
Explanation:
Which statement best explains why less energy is available to organisms as a food chain gets longer?
B.Organisms use some of the energy for life processes
Type the complementary sequence to the following nucleic acid:
TAAGGC
Answer:
The ATTCCG
Explanation:
A and T are friends so when you get a sequence like TTA you change it to AAT
And C and G and friends so if you get CCG turn it to GGC
Solid gold is denser than liquid gold. Do you think the atoms in liquid gold are as closely spaced as are the atoms in solid gold?
3
What effect of the disappearance of the otters on the diet of the glaucous-winged gulls?
ASAP ASAP BEING TIMED!!!!!! Which group of plants lacks true roots, stems, and leaves? Oseedless vascular plants nonvascular plants O nonflowering seed plants Oflovwering plants
Answer:
Nonvascular Plants
Answer:
Nonvascular Plants
Explanation:
hope this helps!:)
Identify the following.
pistil
1 female part
2 neither male nor female part
3 male part
How are cells related to organs ?
The space within a cell which holds water is:
a) nucleus
b) cytoplasm
c) vacuole
d)chloroplast
Answer:
[tex]\boxed {\tt C. \ Vacuole}[/tex]
Explanation:
Let's analyze each answer choice.
A. Nucleus
Houses the genetic material (DNA) and produces RNAB. Cytoplasm
Fills in space, keeps organelles in place, and chemical reactions occur hereC. Vacuole
Stores substances, isolates toxins, helps with excretionD. Chloroplast
Photosynthesis occurs hereBased on the functions of each organelle, we can assume the best answer is C. Vacuole. Vacuoles store substances, so these organelles would hold water.
A flap of elastic cartilage that acts as a switch between the trachea and the esophagus
What cytoskeleton structures are Responsible for moving organelles like chloroplasts around the cell
Answer:
These studies suggest that actin filaments play a major role in the positioning and movement of chloroplasts.
Explanation:
I hope this is the anwser you were looking for or if this even helps
Why is it good for scientists to be skeptical? ecause
Answer:
Skepticism helps scientists to remain objective when performing scientific inquiry and research.
Explanation:
You have an Elodea sprig in a test tube containing bromothymol blue. Then you watch it for several days. At what time of day will the oxygen level in the tube be the lowest?
a)just before sunset
b)midnight
c)just before sunrise
d)mid-afternoon
Answer:
c
Explanation:
If you put an Elodea plant in a test tube containing bromothymol blue and watch the oxygen level, the time of the day in which the oxygen level in the tube would be lowest will be just before sunrise.
First, there is a need to understand oxygen is produced as a result of photosynthesis according to the following equation:
[tex]6CO_2 + 6H_2O ---> C_6H_1_2O_6 + 6O_2[/tex]
The process of photosynthesis takes place in 2 reactions:
Light-dependentLight-independentOxygen is produced from the splitting of water in the light-dependent reaction. Hence, the production of oxygen stops when there is no light - when the sun sets.
Whatever quantity of oxygen that has been produced just before the sun sets would remain and will gradually be used for respiration by the Elodea plant until the sun rises again the following day.
Thus, the level of oxygen in the tube would usually be lowest just before the sun rises and oxygen can be produced again.
More on the light reaction of photosynthesis can be found here: https://brainly.com/question/14015819
A population of frogs in a pond began with 67 individuals. Over one year, the population changed to 53.
Which are two possible reasons for the change within the frog population?
emigration or increase in death rate
emigration or increase in birth rate
immigration or decrease in death rate
immigration or increase in birth rate
PLZ HURRYYYY 20 POINTS
Answer:
A. emigration or increase in death rate
Explanation:
i just took the test and got it rigt lol
The two possible reasons for the change within frog population is emigration or increase in the death rate. Thus, the correct option is A.
What factors affect the population?The major factors which affect the population of a species are birth rate, death rate, and migration of the species.
Birth rate is the number of individuals born in a population in a particular time period. Birth rate adds more individuals to a population.
Death rate is the number of individuals die in a population in a particular time period. Death rate decreases the population number.
Immigration is the number of individuals which enter a population.
Emigration is the number of individuals which migrate out of a population.
Therefore, the correct option is A.
Learn more about Population here:
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The area where an ocean meets land is called the ____ zone.
aphotic
photic
intertidal
benthic
Answer:
the area where ocean meets land is called the intertidal zone
The area where an ocean meets land is called the "intertidal" zone. Therefore, option (C) is correct.
What is intertidal zone?The intertidal zone, also known as the littoral zone, is the area of the shoreline that is exposed to air at low tide and submerged underwater at high tide. This zone is the boundary between the land and sea and is constantly affected by the ebb and flow of the tides. The intertidal zone is characterized by its unique physical and environmental conditions, such as the exposure to air and sunlight, the fluctuations in temperature and salinity, and the constant pounding of waves.
Due to these environmental conditions, the intertidal zone is home to a diverse range of plant and animal species that have adapted to the harsh and dynamic environment, such as barnacles, mussels, crabs, and seaweed. The intertidal zone is an important ecosystem that provides habitat, food, and breeding grounds for many marine species, and is also a popular area for recreation and scientific research.
Learn more about intertidal zone, here:
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Muscles can contract because they are made of
-afferent neurons
-efferent neurons
-interneurons
-connector neurons
-glial cells
Answer:
effererent neurons signal muscles to contract
Muscles can contract because they are made of efferent neurons.
What are the types of neuron ?Neurons basic microscopic unit of nervous system which is responsible for carrying information to different parts of the body by using electrical and chemical signals and coordinate all of the necessary functions of life.
It has three parts such as Soma or cell body which receives information and contain the cell’s nucleus, Dendrites a thin filament which carry the information from other neurons to the soma, Axon is a long projection that carries information from the soma and sends it to other cells.
Neurons involve in impulse transmission can be presynaptic neuron which emits the nerve impulse and the postsynaptic neuron receives this impulse.
Neurons can be Sensory neurons which carry the information from the sensory organs like skin, eyes, ears, nose and Motor neurons, Interneurons form a bridge between two neurons.
Learn more about neuron , here:
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Which quantity does a light-vear measure? distance speed time volume
Answer:
speed is the answer
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when placed in the same container, oil and water do not mix because
Oil and water do not mix because mix each other because water is a polar solvent while the molecules of oil are non-polar in nature.
What are the characteristics of water?The characteristics of water are as follows:
It is a universal solvent that is polar in nature. It possesses high heat capacity and heat of vaporization. It has properties like cohesion and adhesion. The solid form of water is less dense as compared to its liquid form.Due to differences in their polarity, the molecules of water and oil are not intermingled with each other. Due to this, the polar compounds are dissolved in a polar solvent while non-polar compounds like oil are dissolved in a non-polar solvent. Thus, the molecules of oil will finally stick to each other and are immiscible with water.
Therefore, oil and water do not mix because mix each other because water is a polar solvent while the molecules of oil are non-polar in nature.
To learn more about Solubility, refer to the link:
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Which of these best explains the impact of radiation on the geosphere?
Land is heated up by the sun's energy.
Water is heated up by the sun's energy.
Water heats up the air surrounding it.
Land heats up the air surrounding it.
Answer:
I need points
Explanation:
Yeet
Acid rain is rain that carries unusually high acids that can break down rocks. This is an example of a __________ interaction.
A) atmosphere and geosphere
B) hydrosphere and chronosphere
C) chronosphere and biosphere
D) geosphere and chronosphere
E) hydrosphere and geosphere
Answer:
E
Explanation:
Rain is water=Hydrophere
Rocks=geosphere
What do rabbit, deer, and squirrel have in common?
Answer: A nucleus and fur, eyes, limbs, a mouth, a spine, a nose, lungs, heart, organs, liver, vains, blood probably more
Explanation:
Answer:
they can live in the forest.
they drink water.
they breath.
they bleed.
they can see.
they can jump.
they can eat.
they only eat plants.
they have fur.
they can be the same color.
they can be small.
they all run.
they all make noise.
they can make baby's.
they can sleep.
I'm so tired why am I here... just to suffer?
In a population of frogs, there is a dominant allele H that improves the survival of eggs in moderately dry conditions compared to the wild-type and recessive h allele. Imagine that climate change causes the environment where these frogs live to become more dry. Individuals with the drought-resistant eggs on average have 21 viable offspring per frog per generation, whereas those without that phenotype on average have only 12. If we start off with genotype frequencies of .02 HH, .03 Hh, and .95 hh, what is the average excess fitness of the H allele?
Answer:
8.55
Explanation:
I n the year1908, these two men Godfrey Hardy and Wilhelm Weinberg gave a specification of the relationship between the frequency of genotype and frequencies of allele that should occur when such a population is in equilibrium
p²+2pq+q² = 1
we have,
p² = 0.02
p = √0.02
such that frequency of H is = 0.1414
2pq = 0.03
q² = 0.95
q= √0.95
such that frequency of h =0.9746
(21-12) * 0.95 =
8.55 frogs per generation
H and h will coexist.
describe the process of building a paradigm and of shifting one
Answer:
Explanation:
A paradigm shift is a major change in the concepts and practices of how something works or is accomplished.
A paradigm shift very often happens when new technology is introduced that radically alters the production process of a good or service.
Although the idea of paradigms has been around for quite some time, the concept was explored by physicist and philosopher Thomas Kahn Kuhn.
Which of the following is an example of applied research?
A shoe company develops a new material that can better absorb impact for a new running shoe.
A scientist studies the way human cells react to changes in temperature to better understand how
people live in extreme climates.
A teacher leads her students though the dissection of a frog so they can study different organ
systems.
An astronomer is curious about telescope lenses and builds a lens that is a composite of several
different materials.
Answer:
The example is "A scientist studies the way human cells react top changers in temperature to better understand how people live in extreme climates"
