Answer:
C. come from other cells.
Explanation:
Which crop leaves soil with the lowest levels of nitrogen?
Answer:
cotton
Explanation:
Cotton crop leaves soil with the lowest levels of nitrogen.
What is a nitrogen?Nitrogen is the chemical element with the symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at seventh in total abundance in the Milky Way and the Solar System.
Nitrogen is important to the chemical industry. It is used to make fertilizers, nitric acid, nylon, dyes and explosives. To make these products, nitrogen must first be reacted with hydrogen to produce ammonia. This is done by the Haber process.
Nitrogen is important to all living things, including us. It plays a key role in plant growth: too little nitrogen and plants cannot thrive, leading to low crop yields; but too much nitrogen can be toxic to plants [1]. Nitrogen is necessary for our food supply, but excess nitrogen can harm the environment.
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These little bunnies (A,B, and C) were born in the same litter to the same parents, but they have different traits for the feature of ear thickness. Bunny A has thick ears, bunny B has average ears, and bunny C has thin ears. How did these bunnles end up with ear thicknesses that are different from one another even though they have the same parents? How did the gene combinations result in the different tralts?
Answer:
This has already been answered here:
https://brainly.in/question/16617015
Explanation:
Where is the Sahel???????????
Answer:
a vast semiarid region of North Africa, south of the Sahara, that forms a transitional zone between the desert and the region known as Sudan.
Explanation:
Color in poison dart frogs is controlled by a single gene with multiple alleles. A blue poison dart frog that is heterozygous for the blue allele (Cb) and red allele (Cr) is crossed to a yellow poison dart frog that is heterozygous for the orange (Co) and yellow (Cy) alleles. Their progeny are 1/2 blue, 1/4 orange, and 1/4 yellow. Determine the order of dominance for the alleles. (Order of dominance is indicated as: A > B > C > D such that A is dominant over all alleles, B is dominant over C and D, C is dominant only to D, and D is recessive to all alleles.)
Answer:
Cb>Cy>Co>Cr
Explanation:
First of al we need to do the Punnett square. As a result we get the genotypes:
CyCb
CyCr
CoCb
CoCr
Because there are no red frogs, red is the least dominant as it isn't expressed in any genotype.
Half of the progeny are blue and half of the possible genotypes contain the blue allele meaning that blue is expressed in all genotypes. This means that blue is the most dominant.
The only alleles left are yellow and orange. We can deduce that yellow is more dominant than orange because one of the parent frogs is yellow and contains the genes for yellow and orange.
As a result blue is the most dominant, yellow is the second most dominant, orange is the third most dominant and red is the least dominant.
Help please Smart kids need it soon!
Answer:
A. Prokaryote - no nucleus
B. Eukaryote - multicellular
C. Prokaryote - bacteria
D. Eukaryote - nucleus
E. Both - Organism
F. Eukaryote - Insect
G. Prokaryote - Unicellular
H. Both - Cellular Respiration
Explanation:
Construct the electron dot diagram for chlorine. You have completed this exercise. Step 1: Use the periodic table to find the chemical symbol for chlorine. The symbol for chlorine is: Civ Step 2: How many valence electrons does chlorine have? Step 3: Add dots one by one around the chemical symbol to represent valence electrons. Start at the top and move clockwise around the symbol. •CT: Nice work! You have created the electron dot formula for chlorine. Intro ) Final
Answer:
1. Cl
2. 7 valence electrons
3. u did it right
Good job
The chemical symbol for chlorine is Cl. There are seven valence electrons present in chlorine.
What are valence electrons?
Valence electrons are electrons in an atom's outermost shell, or energy level. For example, oxygen contains six valence electrons, two of which are in the 2s subshell and four of which are in the 2p subshell.
The chemical symbol of the element (as found on the periodic table) is written in the Lewis symbol for an atom, and the valence electrons are depicted as dots encircling it.
The number of electrons in an atom's outermost shell is referred to as its valence electrons. The final shell of the chlorine atom now has 7 electrons. As a result, a chlorine atom contains 7 valence electrons.
Therefore, Cl is the chemical symbol for chlorine. In chlorine, there are seven valence electrons.
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Energy is the ability to produce motion.
True
False
Answer:
I believe that's true. Because you need energy to move.
Name 2 technologies that have prevented diseases.
Answer:
Pulsed UV Disinfection.
Maceration.
Air Steriliser.
Fogging Machine.
Long-Lasting, Alcohol-Free, Hand And Surface Sanitisers.
Explanation:
What was the average of diameters (cm) for the Willapa Bay urchins sampled before the hunt? (Type just the number rounded to the tenth place and do not include units.)
Answer:
See Explanation
Explanation:
The question is incomplete as the diameters of the Willapa Bay urchins were not given.
However, I'll give a general way to solve this problem.
Average is calculated using:
[tex]Average = \frac{\sum x}{n}[/tex]
i.e. Sum of all diameters divided by the number of bay urchins.
The diameter of urchins is usually between 6cm to 12cm; So, I will assume the following diameters for 10 urchins.
10cm, 8cm, 10cm, 7cm, 9cm, 10cm, 6cm, 10cm,8cm, 8cm
Using the above data, the average is:
[tex]Average= \frac{10+8+10+7+9+10+6+10+8+8}{10}[/tex]
[tex]Average= \frac{86}{10}[/tex]
[tex]Average= 8.6[/tex]
3. Worms belong to the kingdom Animalia. There are many different types of worms. Which of the following best describes why all worms belong to the same phylum? A All living worms live in marine environments. B. All living worms feed on the same living organisms. C. All living worms are parasites. D. All living worms are invertebrates.
Answer:
D
all living worms are invertebrates
All living worms are invertebrates. Therefore, option (D) is correct.
What are worms?Worms are a diverse group of invertebrates that belong to the phylum Annelida. They can be found in a variety of environments, including soil, freshwater, and marine habitats. They are segmented and have a long, cylindrical body.
Some common types of worms include earthworms, red worms, and marine worms. They play important ecological roles, such as breaking down organic matter, aerating soil, and acting as food for other animals. They can also be used for various human purposes, such as fishing bait, composting, and medical research.
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What is dumping?
A.
Dumping is sending surplus products as aid to poor or disaster-stricken areas.
B.
Dumping is hoarding scarce goods to cause an increase in price.
C.
Dumping is disposing of food items that don’t meet state food standards.
D.
Dumping is exporting goods at prices that are lower than their value.
Answer:
C.?
Explanation:
Sorry if it wrong
Oxygenated blood returns to the heart from the lungs via four pulmonary ____.
a. arteries
b. arterioles
c. veins
d. venules
Answer:
C
Explanation:
All veins carry deoxygenated blood except pulmonary vein
Answer:
The answer is
c. veins
Explanation:
examples of latex crops
Answer:
Plant families that produce copious amounts of latex include:
Euphorb family (Euphorbiaceae),
milkweed family (Asclepiadaceae),
mulberry family (Moraceae),
dogbane family (Apocynaceae), and.
chicory tribe (Lactuceae) of the sunflower family (Asteraceae).
Explanation:
What is the name for the science that studies evolution that oc-
curs within a population?
A
gene pool
B
macroevolution
с
microevolution
D
population genetics
Answer:
D. Population genetics
Population genetics is the study of genetic variation within populations, and involves the examination and modelling of changes in the frequencies of genes and alleles in populations over space and time. ... In natural populations, however, the genetic composition of a population's gene pool may change over time.
Explanation:
microevolution - evolutionary change within a species or small group of organisms, especially over a short period. (Not studying the overall evolution in the population, just a single allele usually) Not it then
macroevolution - Macroevolution in the modern sense is evolution that is guided by selection among interspecific variation, as opposed to selection among intraspecific variation in microevolution (this goes over huge groups of different species) Not it then
gene pool - The gene pool is the set of all genes, or genetic information, in any population, usually of a particular species. (Not the study of evolution in a population) Not that then
So it has to be D
Answer:
population genetics
Explanation:
In fruit flies, red eyes (pr _) are dominant to purple eyes (prpr) and normal wings (vg _) are dominant to vestigial wings (vgvg). The genes are located on the same chromosome. A pure breeding red-eyed fly with vestigial wings was crossed with a pure-breeding purple-eyed fly with normal wings. All of the F1 progeny had a WT phenotype. What represents the arrangement of alleles on the F1's chromosome?
Answer:
F1) 100% wild type, Pr Vg / pr vg
-----Pr--------Vg------
-----pr---------vg------
Explanation:
Available data:
Two genes located on the same chromosomered eyes (Pr _) are dominant to purple eyes (prpr)normal wings (Vg _) are dominant to vestigial wings (vgvg)Cross: A pure breeding red-eyed fly and vestigial wings with a pure-breeding purple-eyed fly and normal wings
Parentals) Pr vg / Pr vg x pr Vg / pr Vg
Gametes) ----Pr-------vg---- ----pr-------Vg----
----Pr-------vg---- ----pr--------Vg----
F1) 100% wild type, Pr Vg / pr vg
-----Pr--------Vg------
-----pr---------vg------
25.Adaptation must occur in order for species to survive in
the environment. Which of the following will happen due to
environmental pollution?
O A. Species will be able to survive.
O B. Species will have difficulty surviving.
O C. This environmental change will not affect any species.
O D. The environmental changes will only affect big species.
What would happen to a resting skeletal muscle if the
sarcolemma suddenly became very permeable to calcium
ions?
Answer:
akoto sacaculocome cac
4. The autonomic nervous system is composed of "
1. If the DNA is carrying a silent mutation, what will be the impact it will have on the organism?
This body of knowledge is an example of
Answer:
A body of knowledge is the accepted ontology for a specific domain. A BOK is more than simply a collection of terms; a professional reading list; a library; a website or a collection of websites; a description of professional functions; or even a collection of information.
Explanation:
dont know if this is right
Many of the DD-amino acids found in nature have been discovered in bacterially produced peptides that have antibiotic properties.
a. True
b. False
Answer:
True
Explanation:
Most the amino acid are of L configuration. Antimicrobial peptides consists of D amino acids (D amino acid occur naturally). D amino acids are also found in walls of microorganism. Antimicrobial peptides is released by species including bacteria, fungi etc.
For example - Bacteriocin, peptaibols, plectasin etc.
Hence the given statement is true
A word to describe a solution that has more solute than solvent is?
How is the function of NAD
similar to that of NADP+?
Answer:
The function of NAD+ that is similar to that of NADP+ is that each NAD+ accepts a pair of high-energy electrons. Describe glycolsis in terms of energy input, energy output, and net gain of ATP. In glycolysis, glucose is converted to molecules of pyruvic acid. ... NAD becomes NADH.
Explanation:
Answer:
they are both electrons that carry high energy electrons which then are converted and used into the transport trains.
write a letter to the government explaining the dangers posed by global warming/climate change
Answer:
Global climate change has already had observable effects on the environment. Glaciers have shrunk, ice on rivers and lakes is breaking up earlier, plant and animal ranges have shifted and trees are flowering sooner. Effects that scientists had predicted in the past would result from global climate change are now occurring: loss of sea ice, accelerated sea level rise and longer, more intense heat waves. Scientists have high confidence that global temperatures will continue to rise for decades to come, largely due to greenhouse gases produced by human activities. The Intergovernmental Panel on Climate Change (IPCC), which includes more than 1,300 scientists from the United States and other countries, forecasts a temperature rise of 2.5 to 10 degrees Fahrenheit over the next century.
Explanation:
does this work :)
A thunderstorm adds freshwater to the ocean. What does this do?
Raises the salinity of the water
lowers the density of the water
Raises the density of the water
Raises the temperature of the water
Answer:
C. lowers the density of the water
Explanation:
Took k12 test got 100%
Hope this helps
A thunderstorm adds freshwater to the ocean as it lowers the density of the water. Thus, option B is correct.
What creates density variations in ocean water?
Differences in temperature and salinity that create density variations in ocean water and salinity refer to how much salt that the ocean water contain, and the temperature became a very important factor because it could determine the amount of water that evaporates.
The term thermohaline circulation is the mixing of hot and cold water from upper surface to the lower surface. This is caused by the temperature and salinity that changes in the water.
It is driven by the density gradient in which the thermohaline circulation begins when the temperature is very cold and ice forms in the sea. The surrounding sea water gets saltier and its density increases and it sinks down.
Therefore, A thunderstorm adds freshwater to the ocean as it lowers the density of the water. Thus, option B is correct.
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Why is Mr. Helms breathing rapidly?
Chargaff's rules of base pairing helped scientists determine how DNA replication occurs. What property of the replication process is explained by Chargaff's rules?
A. The phosphate-sugar backbone of one strand serves as a template for the phosphate- sugar backbone of the complementary strand.
B. The phosphate-sugar backbone of one strand serves as a template for the sequence of four nucleotides in the complementary strand.
C. Adenine (A) and thymine (1) are always paired together within a single DNA strand, as are cytosine (C) and guanine (G).
D. Adenine (A) and thymine (1) always bind to each other across complementary strands, as do cytosine (C) and guanine (G).
Answer: The answer is D.
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why does biodiversity occour
How are humans impacting biodiversity in ecosystems around the world? Provide two examples to support your claim.
Answer:
as humans population continues to grow, we're cutting down more trees and occupying more lands to suffice the need of citizens, therefore, decreasing the forest biodiversity. Our plastic bags, as well as wastes, are polluting the ocean and eradicating essential species that are required to sustain a balance ecosystem, therefore, decreasing the biodiversity of the ocean that are required to maintain a balance environment.
Human activities have affected in Biodiversity in the ecosystems negatively and such activities include : i) Indiscriminate hunting/fishing ii) Improper waste disposal
Humans in search of food ( meat ) engage in excessive/indiscriminate hunting of endangered species thereby reducing the Biodiversity of animal species present in the wildlife also excessive fishing activities affects the biodiversity of certain species of fishes in our oceans negatively.
When wastes are not properly disposed they degrade the environment and decrease the biodiversity of the ecosystems in the process. the burning of industrial wastes leads to the exposure of certain species to the negative effects of dangerous gases and liquids thereby making the ecosystems to become unbalanced.
Hence we can conclude that some of the human activities impacting biodiversity in ecosystems around the world include : Indiscriminate hunting/fishing and Improper waste disposal
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a radioactive element has a half-life of 3,000 years. if a sample of this element begins with a mass of 60 grams, how long would you have to wait for the mass to decrease to 15 grams
Answer:
N = 60 g
Half life : N/2 = 3000
N/4 = 15 g
