Answer:
A
Explanation:
The correct option would be A.
The presence of ammonia in the atmosphere of primitive earth provided the nitrogen found in the amine groups of amino acid and the nitrogenous bases in DNA. This has been proven through the simulation experiment of the primitive earth's atmosphere by Stanley Miller and Harold Urey.
The water in the primitive atmosphere was formed from the condensation of water vapour from volcanoes that were characterics of the earth's environment while oxygen in itself is not needed for photosynthesis but a by-product of it.
Which of the following is a prokaryote? Will award 25 points
should a monocercomonoide be considered a life-form?
Answer:
YES because a monocercomonoide is a living thing, eukaryotic.
Explanation:
Could somebody help me with this please
Answer: answers are in the explanation
Explanation:
Golgi body
1. To package and transport glycoprotein
2. To secrete synthesised proteins
3. To secrete lysosomes
Endoplasmic reticulum
-Rough endoplasmic reticulum
1. To transport synthesised proteins
-Smooth endoplasmic reticulum
1. To transport lipids
Mitochondrion
1. To increase the surface area for respiration
2. To provide energy for the process of respiration
Ribosomes
1. To serve as site for protein synthesis
a scientist is examining the role of an element found in fatd and cabohydrates of living things this element makes up 65% of human body mass which statement describes the element he is studying?
The question is incomplete as the group of choices are not provided however the correct group of choices are given as follows:
He is studying oxygen, which can also be found in proteins.
He is studying oxygen, which is the most abundant element in the atmosphere.
He is studying nitrogen, which can also be found in proteins.
He is studying nitrogen, which is the most abundant element in the atmosphere.
Answer:
The correct answer is - He is studying oxygen, which can also be found in proteins.
Explanation:
Human body is comprises of various type of molecules and elements such as fats, protein, carbohydrates and many other elements. Carbohydrates and fatty acids are are made up of 3 major elements carbon, hydrogen and oxygen.
Oxygen is an essential element with 65% of all elements found in human body it shows great affinity with proteins. Oxygen binds with hemoglobin then transferred to the through out the body. The oxygen is also one of the elements found in proteins with other elements like nitrogen, hydrogen and carbon.
Thus, the correct answer is - He is studying oxygen, which can also be found in proteins.
How might the DNA-RNA-protein pathway affect cellular differentiation?
Answer:
For example, cells in the interior of the body may be signaled by genes to become either muscle or connective tissues, while other cells on the exterior of the body will be signaled to become epithelial cells.
Explanation:
Answer: epithelial cells
Explanation:
For example, cells in the interior of the body may be signaled by genes to become either muscle or connective tissues, while other cells on the exterior of the body will be signaled to become epithelial cells.
What is the approximate carrying capacity of the population? In which year, did the population reach the carrying capacity? About how many years did it stay at carrying capacity? A graph entitled Graph A has year on the horizontal axis, from 0 to 9, and population size on the vertical axis, from 0 to 300 in increments of 50. From year 1 to year 3, the population increased rapidly to 250. From year 3 to year 7, the size remained relatively constant. From year 7 to year 8, the size began to decrease.
On Edguenity 2020
Answer:
1) 250 indivuals
2) Year 3
3) 4 years
Quick answer :
250, 3, 4
Have a good day :)
Answer:
Sheeeeeeeeeeeeeesh there ya go
Explanation:
brainliest apreciated
Which action is NOT a way to test a hypothesis? a. Analyze results b. Design an experiment c. Make a model d. Gather and evaluate evidence
Answer:
Make a model
Explanation:
A hypothesis is a plausible explanation of a given phenomenon of the natural world. This explanation (hypothesis) must be tested by using the scientific method.
The action 'analyze results' is NOT a way to test a hypothesis (Option a).A hypothesis can be tested (either confirmed or rejected) by experimental and/or observational procedures.The data collected by these experiments and/or observations can be then used as empirical evidence to support (or reject) the working hypothesis.In conclusion, the action 'analyze results' is NOT a way to test a hypothesis (Option a).
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how does a plant get water form the ground
Answer:
Plants absorb nutrients and water through their roots, but photosynthesis — the process by which plants create their fuel — occurs in the leaves. Therefore, plants need to get fluids and nutrients from the ground up through their stems to their parts that are above ground level.
Explanation: How does a plant get water form the ground.
Answer:
It uses roots that suck up the water.
Explanation:
The roots are like tiny straws located in the bottom of a plant. They suck up water which goes up the stem. And the plants use that water to make food.
Animal cells acquire energy from what?
Answer:
protein
Explanation:
99% sure its protein
Answer:
Food.
Explanation:
Animals get energy from food.
Smita is expetimenting with how a paper airplane's shape affects the
distance it will fly. Which action is the result of her logical reasoning?
A. She records only the data that support her favorite hypothesis.
o
B. She follows her procedure carefully.
o
c. She decides to perform the experiment outside on a windy day.
D. She decides to use the same type of paper for each airplane.
SUBMIT
Answer:
Its D
Explanation:
In what organ of the human body would you find the amygdala?
It's The Brain!!!!!!!!!!!!!!!!!!!!!
Answer:The amygdala is an almond-shaped structure in the brain;
Explanation:
As with most other brain structures, you actually have two amygdalae (shown in red in the drawing here). Each amygdala is located close to the hippocampus, in the frontal portion of the temporal lobe.
HELP ASAP PLZ!!! Read the scenario: You are walking a trail in the woods. You notice something out of the corner of your eye and you want to go investigate, however, the path to get to it has multiple trees that have fallen down from a storm. As you start to climb over the fallen trees, you fall and cut your knee. You decide to go back to the path and go home to clean up your cut. The next day, you notice that your cut feels warm. Describe what is happening during your immune response and explain why the surrounding area feels warm.
The warmth and redness of the surrounding area of the cut is due to the immune system.
Blood carries white blood cells, which attacks pathogens (Cause of infection)
The surface become red and warm as that is a conjugating area of blood.
Can some one help with this? Like I need help ASAP
Answer: Your looking at a map.
Explanation:
What are u asking?
. Pituitary gland (hypophysis): The size and shape of a pea; produces hormones that stimulate other endocrine glands. 2. Adrenal medulla: Is part of the sympathetic nervous system. 3. Parathyroid glands: Produces hormones that regulate glucose levels in the body. 4. Pancras: Primary regulators of blood calcium levels. 5. Thyroid gland: Produces the body's major metabolic hormones.
Answer:
This question is incomplete, the question is asking to match each description with its gland.
1. Pituitary gland (hypophysis): The size and shape of a pea; produces hormones that stimulate other endocrine glands
2. Adrenal medulla: Is part of the sympathetic nervous system
3. Pancreas: Produces hormones that regulate glucose levels in the body
4. Parathyroid glands: Primary regulators of blood calcium levels
5. Thyroid gland: Produces the body's major metabolic hormones.
Explanation:
1. Pituitary gland is the gland known as the "master gland" because it produces hormones that coordinates the activities of other endocrine glands. The pituitary gland is shaped like a pea and functions to maintain the well-being of the body i.e. metabolism, growth etc.
2. Adrenal medulla is the inner part of the Adrenal gland, which is an endocrine gland located above the kidney. The adrenal medulla (a part of adrenal gland) is a part of the sympathetic nervous system which functions in control of blood pressure and heart rate.
3. Pancreas is a digestive organ that acts as a gland by secreting hormones that regulate glucose levels in the body. These hormones are insulin and glucagon
4. Parathyroid glands is an endocrine gland that produced the parathyroid hormone, which helps in the regulation of blood calcium ion levels.
5. Thyroid gland is an endocrine gland located in front of the neck. It produced series of hormones called thyroid hormones that functions in the body's metabolism
which of the following Mendel's laws best explains why the p generation produced two Black puppies
Answer:
Its Law of Segregation. Also please follow my instagram The_official_unleashed
Explanation:
Answer:
A)
Law of Segregation
Explanation:
Our current rockets would take tens of thousands of years to get to even the nearest star, 4.3 ly away. If we invent a spacecraft that can travel 0.1 the speed of light, how long would it take to travel to the nearest star?
- 4.3 ye
- 3.8 x 10^14 yr
- 43 ly
- 1.9 x 10^7 yr
Answer:
It will take the rocket 43 light years to get to the nearest star
Explanation:
1 light year = 9.46 * 10¹⁵ m
speed of light = 3.0 * 10⁸ m/s
In one year, light travels a distance of 1 light year.
A rocket with that travels with a speed 0.1 * the speed of light will travel the distance of one light year in 1/0.1 = 10 light years
Therefore, it will take the rocket 10 * 4.3 light years to get to the star = 43 light years.
43 light years = 43 * 9.46 * 10¹⁴ m = 4.07 * 10¹⁷ m
5. All the living things on Earth form the ______
Humans Come From A Guy Sperm It Goes Into The Females Egg
Answer:
Biosphere.
Explanation:
Living things ( Biosphere )
Land ( Lithosphere )
Water ( Hydrosphere )
Air ( Atmosphere )
Mark as the Brainliest if you think.
how is a laceration treated
Explanation:
Apply antibiotic ointment, and then cover the wound area with a sterile gauze bandage and first-aid tape. Clean the wound area daily with soap and water and apply a fresh sterile bandage. For a minor laceration, remove the bandage after a couple of days to promote healing
Answer:
with pain medication
with apply pressure
with stitches
Explanation:
Edge
Click the statement that best describes the role of each element in living organisms.
Answer:
Nitrogen : Is obtained by plants from bacteria in the soil
Nitrogen : Is obtained by plants from bacteria in the soil Phosphorus : Provides strength to bones and exoskeletons
Nitrogen : Is obtained by plants from bacteria in the soil Phosphorus : Provides strength to bones and exoskeletons Sulfur : Gives strength to the protein keratin
Hope this help :)
Does anyone know the answer????
the basic unit of structure and function of all organisms is cells
Variables are things that change during an experiment. *
O True
O False
Describe the concept of natural selection, using the Galapagos finches as an example. Imagine you were trying to explain the concept to someone who did not know what it is.
Answer and Explanation:
Natural selection is the result of the phenotype-environment interaction which determines gene destiny in space and time, selecting beneficial alleles and increasing their frequency in the population. It is a consequence of the individual differential capability to reproduce and leave offspring. There must be also a genetic base called heritability. Natural selection involves interactions between individuals, the physical environment, and the biological environment.
Natural selection results in adaptation, an increase of the aptitude phenotype. In many cases, adaptations, resulting from natural selection, can be correlated to environmental factors or selective pressures applied by other organisms.
The selective agent is the environmental characteristic that determines the differential survival of the phenotypic classes.
Some intraspecific phenotype variations follow a geographical distribution and can be correlated to changes in environmental conditions, such as temperature or humidity.
Adaptive evolution refers to changes in the organism that lead to the evolution of the species and that are adaptive to certain conditions of the environment. Birds adapt to diverse ecological niches showing specialized beak forms to improve functions such as feeding, mating, defending, competing, and etcetera. These factors play an important role in beak shaping. Natural selection produces adaptive evolution.
During 1977 Daphne Major island went through an important drought, and many plant species produced few or no seeds during and after the event. The medium ground finch population, which is seed-feeder species, was hardly affected by this phenomenon. As seeds´ production dropped and the sizes of the extisting seeds were considerably smaller, the finch population declined drastically from about 1400 individuals to a few hundred in a period of two years, approximately. The fact is that the island weather controls plant species development, and thus, seeds availability as food for the birds. Years later after the drought, the finches population managed to recover but showing differences in the size of their beaks. Before the drought finches had a stubby beak and many years after recovering the average size of the beaks was larger than the beak size of the original population. This difference in phenotype was due to the fact that during the drought, small seeds were very scarce, but large seeds with thick husks were still available. Small birds with small beaks starved because they were not able to open the husk and eat the interior of the seed. But those birds with bigger and stronger beaks were able to do so, and hence, managed to survive. The bird population adapted to the new environmental conditions and resource availability. Natural selection acted on the beak size, changing it.
There are different kinds of natural selection, but in the present example, directional selection is operating.
Directional selection increases the proportion of individuals with an extreme phenotypic trait, in this case, large beaks. This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.
Furthermore, beak size is not only related to feeding strategies, but also to reproduction. Female finches only mate with males that have the same beak size.
What is the geographic area where a given population is found? carrying capacity population density distribution range
Answer:
range
Explanation:
The geographic area where a given population is found is referred to as its distribution range. The geographic or physical boundaries that make up a given population of organisms are represented by the distribution range.
On the other hand, carrying capacity refers to the most members of a species that a particular habitat or ecosystem can support over the long term. It is the maximum population that may exist indefinitely without seriously affecting the environment or exhausting its resources.
A measure of how packed or concentrated a population is in a given area is called population density. The usual unit of measurement is the number of people per unit of habitat or land area. Within a distribution range, population densities can change between areas, indicating how individuals are dispersed within the available environment.
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3. A plant or plant product that is directly used by humans is called what?
a. Indirect plant
b. Direct plant
c. Consumption
d. Horticulture
Answer:
B direct Plant
Explanation:
Direct plant sources are plants or plant products that are directly used by humans
Which type of neuron detects a raindrop falling on skin? cell neuron motor neuron interneurons sensory neuron
Answer:
Sensory neurons
Explanation:
Sensory neurons carry signals from the external parts of your body to the nervous system.
Motor neurons carry signals from the nervous system to the external parts of your body.
Interneurons connect various neurons within the brain and spinal cord.
Hope this helps! :)
The type of neuron that can detects a raindrop falling on skin is sensory neuron. The correct option is D.
What is a neuron?The basic building blocks of the brain and nervous system are neurons (also known as neurons or nerve cells).
Neurons are the cells that receive sensory information from the outside environment and are in charge of providing motor instructions to our muscles.
The glial cells and the neurons are the two main subtypes of brain cells. While neurons in the brain play the dominant role, glial cells predominate in certain regions of the brain.
When you contact a hot surface with your fingertips, your sensory neurons will fire and transmit messages to the rest of your nervous system about the information they have just received.
Sensory neurons are the nerve cells that are activated by sensory input from the environment.
Thus, the correct option is D.
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Cushing syndrome is caused by an increase in the synthesis of cortisol in the adrenal gland. Which of the following compounds is directly required as a substrate for the synthesis of this hormone?
A) cholesterol
B) glucose
C) free fatty acids
D) amino acids
Answer:
Cholesterol
Explanation:
Cushing Syndrome occurs as a result of exposure of the body to elevated levels of cortisol hormone (stress hormone) for a long time. The elevated level of cortisol which is a steroid hormone, results from increased synthesis of cortisol in the adrenal glands. Cortisol is synthesized from a substrate called, cholesterol. Cortisol synthesis occurs in the zona fasciculata of the adrenal cortex and controlled or regulated by the hypothalamus-pituitary-adrenal axis or HPA axis.
Cholesterol, which is an important substrate in cortisol synthesis, is a lipid usually found in cells and plays an important function in hormone synthesis, food digestion and synthesis of Vitamin D.
Please help! i'm stuck on this
Grassland ecosystems in Texas have evolved to depend on periodic fires to return nutrients to the soil and encourage plant reproduction. Humans have prevented fires in many of these grassland areas, resulting in plant and animal communities with very little diversity. Wildlife biologists often recommend purposefully starting fires called prescribed burns, which are monitored and controlled, in grassland ecosystems every 3 to 4 years. These biologists observe greater diversity in plant and animal life in the years following a prescribed burn.
What natural process are the biologists attempting to imitate?
Population bottleneck
Succession
Biomagnification
Species extinction
Answer:
succession
Explanation: this is a hard one but you have to use process of elimination
Which subatomic particle determines the stability of an atom? Which subatomic particle determines the atoms identify? Which subatomic particle (s) determine the atomic mass?
Answer:
The neutron determines the stability of an atom. The proton determines the atoms identity. Both the neutron and proton determine the atomic mass of an atom.
Explanation:
The neutron determine an atoms isotope, and often its stability. The number of protons (which is shown on the periodic table) determine an atoms identity. Both of the neutrons and protons together in the nucleus make up the atomic mass.
90 POINTS!!!! PLEASE HELP !!!!! Which of the following best explains why rain predictions made by meteorologists are sometimes incorrect? (3 points) Group of answer choices Weather data are misinterpreted. Weather instruments are extremely precise. Local variations in weather are too small for weather instruments to replicate. Interference from the sun causes data to be collected inaccurately.
Answer:
C. Local variations in weather are too small for weather instruments to replicate.
The rain predictions made by meteorologists are sometimes incorrect as local variations in weather are too small for weather instruments to replicate. The correct option is c.
Who are meteorologists?Meteorologists are both observers and investigators. They take note of the physical conditions of the atmosphere above them and research maps, satellite data, and radar data.
A meteorologist is a professional who uses scientific principles to explain, understand, observe, or forecast the earth's atmospheric manifestations and/or how the atmosphere impacts the earth and life on the planet.
Meteorological was the name he gave it because it dealt with things that fell from the sky, such as meteors. Because he or she studies what falls from the sky, a person who forecasts the weather is known as a meteorologist.
Meteorologists' rain predictions are sometimes incorrect because local variations in weather are too small for weather instruments to replicate.
Thus, the correct option is c.
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What best describes the role of the squirrel in the food web?
Answer:
[tex]\boxed {\tt C. \ A \ primary \ consumer \ that \ is \ food \ for \ a \ single \ predator, \ the \ hawk}[/tex]
Explanation:
First, let's examine the food web and focus on the squirrel. The grass points to the squirrel which points to the hawk. There are no other arrows involving the squirrel.
Therefore, the squirrel is only food for the hawk. We can eliminate A and B.
Now, let's focus on the last two answers. The difference between C and D is C says "primary consumer" and D says "secondary consumer". Let's define these terms.
Primary consumer
Consumers that eat plantsSecondary consumer
Consumers that eat primary consumersThe arrow points from the grass to the squirrel. The arrow represents energy flow, so the energy flows from the grass to the squirrel (the squirrel eats grass). Grass is a plant, so a squirrel is a primary consumer.
The correct answer is C. A primary consumer that is food for a single predator, the hawk