Answer: Starch is a long polymer molecule in one shape of a coil. The iodine molecules goes inside of the coil and this is what makes it turn blue/black. Iodine is a diatomic element with the formula, I2.
Explanation:
Answer:
This is because the compound of iodine and starch is unstable, but if you put the test tube in cold water, a dark blue sediment will form once more. When starch is heated to boiling point, it begins to break down, and the chains of amyloses break, thus, forming short chains of dextrins, so the colour starts to change.
Explanation:
Study of embryos of various organisms to show a common ancestor
because of similarities in development is know as ...
natural selection
speciation
embryology
evolution
why the ocean near Christchurch is a different temperature than we’d expect for its latitude (distance from the equator).
Answer:
Water moving from the equator is warmer than would be expected based on latitude, and so is warmer than the air it passes.
of the following job analytic techniques, which is aimed at directly connecting job analysis to the selection context by identifying the knowledge, skills, abilities, and other characteristics (KSAOs) necessary for the job?
Answer:
patience
Explanation:
Who can help me fill this in
Answer:
a - flower
b - ovule
c - fruit
d - embryo
e - seed
f - seedling
Explanation:
Antigens are foreign proteins that invade the systems of organisms. Vaccines function by stimulating an organism's immune system to develop antibodies against a particular antigen. Developing a vaccine involves producing an antigen that can be introduced into the organism being vaccinated and which will trigger an immune response without causing the disease associated with the antigen. Certain strains of bacteria can be used to produce antigens used in vaccines. Which of the following best explains how bacteria can be genetically engineered to produce a desired antigen? A. The gene coding for the antigen can be inserted into plasmids that can be used to transform the bacteria. B. The bacteria need to be exposed to the antigen so they can produce the antibodies. C. The DNA of the antigen has to be transcribed in order for the mRNA produced to be inserted into the bacteria. D. The mRNA of the antigen has to be translated in order for the protein to be inserted into the bacteria.
Answer:
A. The gene coding for the antigen can be inserted into plasmids that can be used to transform the bacteria.
Explanation:
Genetic engineering is the process of manipulating an organim's genome in order to yield a desirable result. According to this question, a vaccine is to be created using an antigen that will trigger an immune response against the particular disease in the involved organism.
However, the antigens needs to be produced by genetically engineering/modifying bacteria. To do this, the gene coding for the antigen can be inserted into plasmids, an extra-chromosomal DNA, that can be used to transform the bacteria. In other words, the plasmid + antigen gene, which represents the recombinant DNA will confer upon the transformed bacteria the ability to produce the antigen.
Answer:
The gene coding for the antigen can be inserted into plasmids that can be used to transform the bacteria.
Many farmers and gardeners compost their plant and animal waste. The living material naturally decays in compost bins, forming a dirt-like substance that’s rich in nutrients. The next season, farmers use this substance as a natural fertilizer for their crops. A biology student has grown tomato plants for several years. Until now, he used an artificial fertilizer formulated for tomato plants. This fertilizer caused his plants to grow faster and taller than they grew in unfertilized soil. The student wants to know whether using natural compost will cause his tomato plants to grow faster and taller than his artificial fertilizer. Answer the following questions to plan an investigation using the steps of the scientific method and help the student find the answer to his question. Construct at least two possible hypothesis for the students experiment
Answer:The student's observations before he starts his experiment are that his tomato plants grew faster and taller with his artificial fertilizer rather than without any fertilizer at all.
Explanation:
i want brainliest pls
In North America, about 65% of the population can taste
PTC
Calculate the frequencies of the dominant allele (p) and
the recessive allele (q) for the information presented.
Round to the nearest hundredth.
Value of p:
Value of q:
Answer:
p= 0.41
q=0.59
Nitrogen cannot be used by plants or animals in its gaseous form. Place the steps of the nitrogen cycle in order to show how nitrogen becomes usable to plants and animals.
Explanation:
I don't know the answer, but someone already answer it the question are similar you can check for your self
Name two homologous structures in vertebrates. Why are they so called ? How do such organs help in understanding an evolutionary relationship ?
Please help me with this, i'll reward brainliest.
Answer:
1) homologous structures in vertebrates - Limbs of birds, mammals, amphibians and reptiles. 2) They are so called since they have similar basic structural plan, but appear different externally and perform different function. However they have evolved from a common ancestor. 3) The homologous characteristics indicate common ancestory.
Explanation:
I just hope this helps!
➜ Two homologous structures in vertebrates are:
Limbs of birds and reptiles.Limbs of reptiles and amphibians.These are so called because the organ have similar structure to perform different functions in various vertebrates.
The homologous characteristics of such organs indicate common ancestory. Thus these exist an evolutionary relationship.
((I need the questions a. and b. please)))
Answer:
Genotypic ratio: 2:2
Phenotypic ratio: 2:2
Explanation:
There are 2 combinations of Hh and 2 combinations of hh
There are 2 chances that the offspring will have 2 heads
There are 2 chances that the offspring will have 3 heads
When the body is attacked by a foreign substance, the _____ defenses are the first to react.
Answer:
Correct answer is "non specific defenses"
Answer:
non specific
Explanation:
When the body is attacked by a foreign substance, the non specific defenses are the first to react.
Help please
the classification level that includes the most specific traits
A. species
B. kingdom
C. class
D. order
is a structure that the squid can force water through for movement by
propulsion. This is also the location where waste can exit as well as ink
What type of limb does a hen have?
Answer:
four limbs have ahen/ chicken
Which statement correctly describes proteins?
A
Polypeptide chains are formed in the nucleus.
B
DNA is the original source of protein structure.
C
The function of a protein is determined by the RNA.
D
Each nucleotide base is encoded into a single amino acid.
Answer: B
Explanation:
A - not correct since polypeptide chains are formed in ribosomes which exist in the cytoplasm
C. not correct -protein function is determined by DNA
D. not correct - 3 nucleotides aka a codon is encoded into a single amino acid.
Answer:
B.) DNA is the original source of protein structure.
Explanation:
what are notes for the nervous system section in edge?
plz tell me the truth
Answer:
The Brain
In the brain, the cerebrum is the largest part; it controls voluntary movement (actions you choose to do), sensory processing (vision, hearing, smell, taste, touch), speech, memory, intelligence, and emotion. The cerebrum allows you to move your muscles and know what to do when you're playing. Next, the cerebellum helps regulate motor control, coordination, and balance. The cerebellum lets you play your favorite sport since it detects shifts in balance when you're moving then sends signals to your body so it can adjust and move smoothly. The brain stem has several necessary functions: however, the medulla oblongata, which connects the brain and spinal cord, best helps you play sports since it executes a critical role in regulating involuntary functions, including respiration (breathing), heart rate, blood flow/pressure, and digestion. It is essential when exercising since it controls your heart to pump blood and deliver oxygen throughout your body; respiration provides the energy you need when playing sports and oxygen to your heart.
Neurons
However, we can go into further analysis, as three types of neurons transmit information throughout your body: sensory neurons, interneurons, and motor neurons. Sensory and motor neurons are located in the PNS (Peripheral Nervous System), while the CNS (Central Nervous System) holds the interneurons.
When you react to something, your body decides what it should do by sending impulses throughout the body.
Sensory Neurons
First, sensory neurons convey the information from the sensory organs (PNS) into the CNS.
Interneurons
The interneurons receive the impulses from sensory neurons in the CNS then relay the brain's response to motor neurons.
Motor Neurons
Finally, motor neurons transport impulses from the spinal cord (CNS) to the muscles or glands in your body.
single-celled organisms are prokaryotes, such as archaeans and bacteria.
Answer:
That's right.
Explanation:
It doesn't seem you're asking anything, if you're asking for confirmation this is right then I can tell you it is.
Homologous chromosomes
Definitions
What does homologous chromosome mean?
True/False: The law of conservation of matter applies to the cycle of photosynthesis and cellular respiration.
Answer:
It is true, The law of conservation of mass is tied to the fact that in chemical processes, atoms are conserved. Since every atom is contributed to the mass of reactants and products in a reaction, not losing any atoms is equivalent to not losing any mass.
Directions Make a list of objects, products, and any other items around your house where plants were involved in the production of the item. You should have a list of at least twenty items. Then respond to the following questions: Note: Your list of objects and the answers following should be at least 200 words in length. What if plants no longer existed on Earth? How would your life be different?
Answer:
-20 items-
Bed
Cat
Dog
desk
water
stove
oven
chair
toilet
shirt
shampoo
shoes
backpack
food
socks
paper
pencil
table
mask
towel
If Plants no longer existed on earth then there would be no way for carbon dioxide to be converted into oxygen, without oxygen animals and humans alike would die. The Worlds "Air" would be toxic for us to breathe, we need plants to survive. Without plants, animals would die of starvation, and predators would as well without substance.
what happens when you put a small amount of solute in a large amount of solvent?
a.the solution will be concentrated
Explanation:
the solution will be diluted or less concentrated ...as amount of solvent is greater than amount of solute ..
hope this will be helpful to you . plz mark my answer as brainlist if you find it useful.
What needs to change so that only the green solutes diffuse across the membrane?
What need to be changed is ; The use of selectively/semi-permeable membrane
To selectively allow the passage ( diffusion ) of a certain type of solute through a membrane in a solution, we should make use of a selectively permeable membrane which allows only the passage of a certain type of solute contained in the solution ( like the green solutes ).
The use of permeable membrane in a solution is to selectively allow flow of solutes or solvent from a region of lower concentration to a region of higher concentration.
Hence we can conclude that what needs to be change is The use of selectively/semi-permeable membrane will allow only the green solutes to diffuse across.
Learn more : https://brainly.com/question/24097552
Fernanda is feeling sick and goes to the
doctor. Upon taking a blood sample, the
doctor observes that Fernanda's cells
contain a pathogen that seems to be made
of small cells with no nucleus. What type of
infection does Fernanda have?
bacterial
fungal
none of the above
viral
Answer:
bacterial
Explanation:
A prokaryotic organism is an organism that does not possess a membrane-bound nucleus that houses its genetic material. Organisms grouped under this domain are bacteria, archaebacteia etc.
According to this question, Fernanda goes for a blood sample because she felt sick. The result of the blood sampling shows that the cells of Fernanda contain a pathogen that seems to be made of small cells with no nucleus. This property describes a prokaryotic pathogen. Hence, the infection is most likely to be that of a BACTERIAL INFECTION.
Note that, a fungus is eukaryotic while a virus is considered non-living because it can only replicate in a living host.
PLS HELP AS SOON IS POSSIBLE
Nonnative species can cause serious problems with marine ecosystem biodiversity. The graph shows a summary of the different methods by which invasive species reach new locations based on United States Geological Survey data as of 2016. Based on this information, what recommendation could be made to reduce introductions?
A- Methods should be put in place to reduce the ability of species from escaping from captivity and establishing themselves in new locations.
B- People should take extra care when setting up a home fish tank to be certain that all organisms in it will be properly maintained so that the animals remain healthy and diseases are not spread.
C- Science should more closely study the genetics of the different organisms used to prevent mixing of DNA.
D- Ships should install some form of cleansing mechanisms before releasing their ballast water during transport and should be checked for unintended cargo.
Answer: D
Explanation: 20% of invasive species are introduced by Shipping so checking the ballast tanks in cargo ships would help the most I think
To reduce introductions of Non-native species, ships should install some form of cleansing mechanisms before releasing their ballast water during transport and also check for unintended cargo.
What are non-native species?Non-native species are also called invasive species. They are called so as they are foreign or not indigenous to a particular ecosystem and have been introduced to the said ecosystem by some unnatural methods.
These species show a high capacity for adaptation to their new environment. They quickly multiply and reproduce and therefore increase in population.
This sudden and unnatural increase in their population soon after they are introduced to a new environment will greatly affect the ecosystem of the new environment. The new species will compete with the native organisms of that environment for resources. This may cause the native flora or fauna to become endangered or even extinct.
The accidental introduction of invasive species happens quite often and causes a lot of problems. In a marine ecosystem, it happens a lot due to the ships that travel through a variety of marine regions.
So, ships should install some form of cleansing mechanisms before releasing their ballast water during transport and should be checked for unintended cargo.
Therefore, the correct option is D.
Read more about invasive species, here
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Why might it be an issue to cut the trees down to build a home/shelter? How would that impact the respiration/photosynthesis cycle?
Answer:
Trees are one of the most important things lives
Because the trees take our carbon dioxide and gives us oxygen in return. It will also low the rate of oxygen provided by trees leading to may be increase in the global warming rate, and also production of heat and suffocation in crowded rooms
The Five Kingdom classification system was used until the invention of:
A. the microscope.
B. the scientific method.
C. DNA sequencing.
D. genes.
The Five Kingdom classification system was used until the invention of option A. the microscope.
What are the five kingdoms?The living organisms should be divided into five different kingdoms i.e.
FungiProtistaAnimaliamoneraAnd the plantar.These are based on the attributes like the structure of the cell, nutrition mode, reproduction mode, etc,
Based on this, we can say that The Five Kingdom classification system was used until the invention of option A. the microscope.
Correction on the title: What are the five kingdoms Please use bullets to enumerate the kingdoms
Learn more about kingdom here: https://brainly.com/question/16568397
1. A study is being done to test the effects of habitat space on the size of fish populations. Different sized aquariums are set up with six goldfish in each one. Over a period of six months, the fish are fed the same type and amount of food. The aquariums are equally maintained and cleaned throughout the experiment. The temperature of the water is kept constant. At the end of the experiment the number of surviving fish are surveyed. a. Independent Variable: b. Dependent Variable: c. Controlled Variables/Constants: d. Experimental Controls/Control Groups:
Answer:
a. Independent Variable: different sized aquariums
b. Dependent Variable: number of surviving fish
c. Controlled Variables/Constants: amount and type of food, aquarium maintenance and water temperature
d. Experimental Controls/Control Groups: none
Explanation:
In an experiment, the dependent variable is the condition that is being measured or tested in the experimental procedure, while the independent variable isn't changed and serves to measure the outcome of the dependent variable. Moreover, the constant variables are those conditions that stay the same in the experiment. As observed in the case above described, an experiment usually has multiple constant variables. Finally, a control group is composed of individuals/research subjects who do not receive the experimental treatment, and therefore they can be used to compare the outcomes observed in the experimental groups.
What is the purpose of a control in this experiment?
Question 9 options:
The control is the tube that only has milk in it.
The control is the one tube that we know will show milk digestion.
The control is the one tube that we know will not show milk digestion.
The control is the only one the scientist changes.
Answer:
I can't definitively answer this because I don't know the experiment, but I can help.
Explanation:
The "control group" of an experiment is like a dry simulation, where there is no variables changed across all the different trials you do. This is different from a dependent variable or an independent variable. Using your newfound knowledge of what a control group is you can automatically cross off the last option.
Since I cannot see what your experiment was I can't give you which of the top 3 answers it is however. You need to look at which one has no change.
If I were to blindly guess I would say the top option seems like the most likely answer.
Why don’t mosses grow very tall?
They need energy to make food, which they get by being close to the ground.
They don’t have roots, so they must be near water.
They need to send out spores via water.
They have seeds that need to roll away.
Answer:
Hello~
Llamalover here!
Mosses have some water-conducting cells, but they do not have the empty, lignin-reinforced cells that allow vascular plants to transport water with strong pressure gradients. Thus, mosses have very limited water transport ability and can't grow very tall.
So, your answer is They need to send out spores via water. I believe
Explanation:
Hope this helps!
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A flower that has showy stamens, but no petals is,
Group of answer choices
perfect
bilateral symmetry
irregular
incomplete