Answer:30.6
Explanation:
1. 13= 270 (.5)^t/7
2. 13/ 270=270 (.5)^t/7/270
3. 0.0481481=(.5)^t/7
4.log (0.0481481= log ((.5)^t/7)
5. 7 log (0.0481481)/ log(.5)= t log (.5) /log (.5)
6. t= -9.2219429/-0.30103
t= 30.63463
t= 30.6 minutes
A soil sample that contains
50% clay, 50% sand, and 0%
silt is called
A. silt loam
B. sandy clay
C. loam
What type of phase change does glacier caves have?
Answer:
Glacier caves form when ice at the bottom of a glacier comes into contact with volcanically heated rock below. The heat of the rock causes some of the ice to melt into liquid water and flow downhill, creating tunnels under the glacier. As the solid ice melts into liquid water, its molecules gain more freedom to move around. The molecules of liquid water become free to slide around each other.
Explanation:
Explain why a river forms a valley. pls help
Answer:
Erosion.
Explanation:
Erosion is when rocks/dirt move from one place to another. Erosion happens due to flowing water such as streams or rivers. Over time, these streams/rivers can erode the land around it to create valleys.
Hope that helps!
write the location and function of ciliated epitheliun.
Answer:
Ciliated epithelium performs the function of moving particles or fluid over the epithelial surface in such structures as the trachea, bronchial tubes, and nasal cavities. It often occurs in the vicinity of mucus-secreting goblet cells.
Gratitude Attitude: THANKS!
What are examples of commensalism in the human body?.
Answer: Microbiota on the skin and gastrointestinal tract, wherein commensal bacteria flourish
Explanation: Microbiota on the skin and gastrointestinal tract, wherein commensal bacteria flourish, is an example of commensalism in humans. Fungus Aspergillus grow in the gastrointestinal tract of humans and share commensalism with them. The human GI tract provides a suitable environment to grow without harming the host humans
Justin is growing a garden and has many different types of liquids with which he could water his plants. He has water, coffee, milk, and fertilizer dissolved in water. He wants to know which liquid will help his tomato plants grow the best.
Independent variable-
Dependent variable-
Controlled variables-
Hypothesis-
I NEED HELP !!!!!!!
Answer:
Explanation:
To identify the different variables from this experiment, we must first understand what the different types of variables depict.
Independent variables are those variables that do not rely on the conditions of the experiment. They are what causes the experiment to proceed the way we want.
Dependent variables are the variables that rely on the effect of the independent variables. They are what we are actually testing for.
Controlled variables are the variables that are constant in an experiment and their outcomes are used to checkmate an experiment.
In the experiment by Justin:
Independent variable: water, coffee, milk
dependent variable: garden growth
controlled variable: fertilizer
How does change in pH affect an ezyme?
Answer:
Changing the pH will affect the charges on the amino acid molecules. Amino acids that attracted each other
Answer:
Changes in pH affects an enzyme because the level of acidity or alkalinity in enzymes varies, therefore enzymes tend to support one aspect of the pH.
Attachment is a strong emotional tie people feel toward other special
people in their life. *
True
False
Bonding is the formation of a close personal relationship.*
True
False
In order to grow properly, a baby's brain must be stimulated to make
connections.
True
False
Answer:
Emotional attachment refers to the feelings of closeness and affection that help sustain meaningful relationships over time. Attachment plays an important role in human connection.
(◠‿◕)(◠‿◕)(◠‿・)—☆(◠‿◕)(. ❛ ᴗ ❛.)(✷‿✷)
Explain the difference between a humoral and a cell-mediated immune response.
Answer:
the main difference between the humoral immune response (HIR) and cell-mediated immune responses (CMIR) is : HIR provides immunity against antigens and pathogens in body fluids, while CMIR provides immunity against the body’s own cells that have either become cancerous or infected.
Explanation:
Hope this helped.
During photosynthesis, how is energy converted within the cell?.
Answer:
During the process of photosynthesis, light penetrates the cell and passes into the chloroplast. The light energy is intercepted by chlorophyll molecules on the granal stacks. Some of the light energy is converted to chemical energy. During this process, a phosphate is added to a molecule to cause the formation of ATP.
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What type of cell presents antigens that influence the outgrowth of axons in the long tracts of the developing and recovering brain
A company packages facial tissues into cube-shaped tissue boxes. Which units are most appropriate for measuring the side lengths of the boxes?.
The units that are most appropriate for measuring the side
of the boxes are meters.
The area of a cubeThe cube is made up of 6 square faces, 8 vertices and 12 edges. This means that to calculate the area of the cube, the area of a side is determined and then times by 6.
Area of a cube= (length×width) × 6
The length of an object and the distance between two objects are measured in meters and it is an internationally accepted method.
Therefore, the units that are most appropriate for measuring the side lengths of the boxes are meters.
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What is the lysosome function
Answer:
They break down excess or worn out cell parts. They may be used to destroy invading viruses and bacteria.
Explanation:
Hope this helps<3
Answer:
They break down excess or worn out cell parts. They may be used to destroy invading viruses and bacteria.
Explanation:
Assume that each finch comes from a large population of similar finches
in its particular environment. Imagine a drought in the environment of
Finch 1 makes the small seeds they normally feed off of scarce. Describe
how natural selection could cause the population of finches in the first
group to evolve over time to resemble the population of Finch 2.
Directional selection increased the frequency of individuals carrying the larger beaks and decreased the frequency of individuals carring small beaks.
What is directional selection?
Directional selection is a way in which natural selection acts by increasing the proportion of individuals with an extreme phenotypic trait.
This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.
How natural selection could cause the population of finches 1 to evolve over time to resemble the population of Finch 2?
In the exposed example, after the drought there were almost no seeds available for finch 1 to feed.
The introduction of a new allele to the population (by mutation or genetic flow) might have produced a few individuals with beaks similar to the one of Finch 2.
This beak was better for feeding. So individuals carrying this beak increased their fitness.
With time, the average size of the beaks was larger. The trait modification was related to the availability of only larger seeds with thick husks.
Eating large seeds with medium or small-sized beaks was impossible, so Finches needed to adapt, developing larger beaks to break bigger and harder seeds and eat the content.
Directional selection was responsible for the rapid change in the finches' beaks size after the drought.
The evolutive force modified the allelic frequencies, increasing the frequency of genetic variants that expressed the larger beak size and declining the frequency of the alleles that expressed smaller beak size.
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Calvin goes for a walk outside and begins to sweat. His sweat will not evaporate. What is the most likely cause of this? a boy sweating on a sunny day A wind speed of 40 mph An air temperature of 7 °C or 45 °F A strong northerly wind A relative humidity of 95%.
Sweat is a type of perspiration method by which the body temperature is regulated. The reason for the sweat not evaporating is the relative humidity of 95%.
What is the humidity?Humidity is the amount of water vapours present in the atmosphere that are not directly visible and plays an important role in climate and weather.
When the humidity of the environment is more than the water vapour from the sources like sweat, leaves, or any other steaming substances will not evaporate as the water content in the atmosphere is already high.
Therefore, option D. A relative humidity of 95% is the reason that sweat will not evaporate.
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If potatoes grow by planting actual potatoes not seeds, where did the first potato come from??
Answer:
It won't let me type it so look at the picture
Explanation:
Hope this helps!
Which are some characteristics of adaptive social behavior? Select three options. Occurs among members of the same species is not usually passed onto offspring is determined by natural selection increases an animal's likelihood of reproducing does not usually help an animal survive.
Adaptive social behaviours are animal behaviour they adapt in species community. It occurs among the same species, increases animals reproduction and is determined by natural selection.
What is adaptive social behaviour?The species of the organism exhibits a social adaptive behaviour among themselves to protect, reproduce, and survive. Aminals like insects, mammals and birds show adaptive social behaviours among their species.
This behaviour affects the reproduction of the species of the ecosystem and is subject to natural selection. An example of this behaviour is a group of ants together carrying food particles.
Therefore, option a. among species, c. determined by natural selection and d. increases reproductive chances are the characteristics of adaptive social behaviour.
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Answer:
A, C, D
Explanation:
Occurs among members of the same species
is determined by natural selection
increases an animal's likelihood of reproducing
got 100% on edge quiz
Which nutrient do adolescent females need less of than adolescent males?.
Answer:
Energy (calories) and protein are essential in pubertal development. Adolescent females require approximately 2200 calories/day, whereas male adolescents require 2500-3000 calories/day. Additional intake requirements include fat, calcium, iron, zinc, vitamins, and fiber.
The term emit is used in the second paragraph. Based on the context, emit means
to ___________.
A absorb
B send out
C collapse
D review
Answer:
B. Send out
Explanation:
emit or emitting means for something to discharge. The words "send out" are an example or term of what can be emit
in which direction do arteries carry blood
Answer:
Arteries carry blood away from the heart
Explanation:
Veins carry the blood back to the heart.
Hope this helps!
What group of organisms was likely ancestral to land plants?.
Answer:What group was likely ancestral to land plants? Because multicellular, freshwater green algae are the closest living relatives of land plants, biologists hypothesize that land plants evolved from multicellular green algae that lived in freshwater habitats.
Explanation:
which hormone is stimulated by rising blood levels of k , low blood levels of na and decreasing blood volume and blood pressure
Answer:
Aldosterone release is stimulated by a decrease in blood sodium levels, blood volume, or blood pressure, or an increase in blood potassium levels. It also prevents the loss of Na+ from sweat, saliva, and gastric juice.
Explanation:
food and territory are balancing factors in an ecosystem what type of phenomena balance these factors
Answer:
uhh either natural and reproductive pretty sure it's reproductive
True or false: Clotting factor numbers are in order of their discovery and not their position in the clotting pathway.
Write a paragraph about cells (5 sentences)
Answer:
prokaryotic: A prokaryote is a single celled organism that does not have a nucleus or membrane bound organelled and its dna is in the cytoplasm. They also cant undergo mitosis because they dont have a nucleus. they are most likely to be unicellular
examples: archea and bacteria
eukaryotic:
A eukaryotic cell is an organism made up of cell that contain their dna in a nucleus. Eukaryotic cells contain membrane bound organelles as well as ribosomes.not all of them are the same though. mst of them are multicellular and go through mitosis
examples: fungi, plants, animals
With respect to antigens and antibodies, what do type O negative and type AB positive blood have in common
Answer:
Nothing
Explanation:
They have no common attributes
Various species of the flowering plant of the genus Chrysanthemum have 18, 36, 54, 72, and 90 chromosomes. The variation is likely due to:
Various species of the flowering plant of the genus Chrysanthemum have 18, 36, 54, 72, and 90 chromosomes. The variation is likely due to polyploidy.
What is polyploidy?Polyploidy can be defined as the number of complete sets of chromosomes in a given cell of an organism.
A diploid organism contains two complete sets of homo-logous chromosomes in its somatic cells.
Many organisms used polyploidy as an evolutionary strategy for adaptation to challenging environmental conditions.
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!!ANSWER FAST!! Find the velocity of a wave in a wave pool if its wavelength is 4 m and its frequency is 0.20 Hz.
An earthquake produces a wave that has a wavelength of 700 m and travels at 5000 m/s. What is its frequency?
Answer:
1) 0.80 m/s
2) 7.143 Hz
Explanation:
The formula to solve these equations is Velocity = Frequency * Wavelength. So I did that and these are my answers.
Alpha-linolenic acid and linoleic acid are classified as _________ fatty acids.
Alpha-linolenic acid and linoleic acid are classified as essential fatty acids. They cannot be synthesized by the body.
What are essential fatty acids?Essential fatty acids are a special type of fatty acids that cannot be synthesized by the body.
Therefore, the essential fatty acids need to be ingested in the diet, i.e., they must be obtained from foods.
The two major families of essential fatty acids include omega-3 fatty acids and omega-6 fatty acids.
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What are the four major glands of the endocrine system?
adrenal glands, pituitary gland, heart, thyroid
pancreas, adrenal glands, pituitary gland, thyroid
pancreas, adrenal glands, thyroid, liver
pituitary gland, thyroid, intestines, adrenal gland
Answer:
pancreas,adrenal glands,pituitary gland&thyroid
Explanation:
b/c the four major gland of endocrine system is this!
the answer is correct?
