explain why a leaf cannot be tested for starch by adding iodine solution directly
answer.
waxy cuticle covering the leaves that prevents the penetration of iodine in the leave cells.
Which of the following correctly indicates the order in which mitosis occurs?
A, B, C, D
B, A, C, D
C, B, A, D
A, C, B, D
Other:______________________________
Based on my knowledge I would say C, B, A, D
the chromosomes replicate themselves, then they line up at the metaphase plate, then they begin to pull apart to form daughter cells
what experiments led to the discovery of dna as the hereditary material?
Answer:
In the 1920s, Frederick Griffith He was studying two different strains of a bacterium, called R (rough) strain and S (smooth) strain. He injected the two strains into mice. The S strain killed (virulent) the mice, but the R strain did not (non-virulent). Griffith also injected mice with S-strain bacteria that had been killed by heat. As expected, the killed bacteria did not harm the mice. However, when the dead S-strain bacteria were mixed with live R-strain bacteria and injected, the mice died.
Explanation:
MPF stands for mitotic promoting factor and this is a[n)...
A. proto-oncogene
B. oncogene
C. cdk-cyclin complex
D. tumor suppressor gene
which of the following is a tissue?
Bone
Collagen
Cytoplasm
Haemoglobin
Answer:
Cytoplasm
Cytoplasm is a tissue
Answer:
c. cytoplasm
Explanation:
How is cytokinesis different in plants and animals?
Answer:
The main difference between plant cell and animal cell cytokinesis is the formation of new cell wall surrounding the daughter cells. Plant cells form a cell plate between the two daughter cells. In animal cells, a cleavage furrow is formed between the two daughter cells.
Explanation:
Have a great day!
Answer:
In plants a cell plate is formed while in animals, it forms a cleavage furrow
Explanation:
a population undergoing natural selection would see a faster and more dramatic change in allele frequency if the starting generation contained more of the allele being selected against.
Answer: As the change in allele frequency causes the change in genome of the living organism inside few generations.
Explanation: The effect may leave the organism with the loss of some genes, while it can effect cause the loss of some of the beneficial genes inside the genome of the organism. Along with that the process can also improve the sequence of genes which are abnormal in nature.
Which of the conditions below is not required to form coal? A. minerals for cementation B. compaction C. swamp area with lots of plants D. little decomposition of the organic matter
Answer:
The answer is A.
Explanation:
I don't really know for sure if im right but i think that is it because we learn about things like that in science but the answer is not c
Which phase of the systems development life cycle would describe in detail the desired features of the system
Answer:
Phase 3
Explanation:
Phase 3 of the systems development life cycle describes the desired features and operations of the system. The objective of the systems design phase is to transform all requirements into detailed specifications covering all aspects of the system. It should also assess and plan for security risks. Finally, approval to progress to the development phase must be granted to complete the systems design phase.
Explain the idea of Nature vs. Nurture in your own words.
Nature vs. Nurture both influence the observed traits of an organism.
The controversy between nature and nurture have been an ongoing discourse for many years. It is believed that the traits of an organism are dependent on genes inherited from the parents. Another school of thought believes that environment alone has the sole influence over the traits of an organism.
However, most scientists today are of the opinion that the influence of nature and nurture are intertwined and they both work together to influence the traits exhibited by any organism.
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When carbohydrate intake is low, which of the following is most likely to result?
a. Your ur body will starve
b.your body will store more fat
c.your energy will use more energy
d.your body will break down other nutrients for energy
Answer:
d
Explanation:
e.g protein is used in the absence of carbohydrates
2. Which organisms make carbon dioxide in the
atmosphere available for all living organisms in
the ecosystem?
Answer:
land plants, bacteria, and algae
Explanation:
should the nation of warring wizards be considered a nation. why or why not
Answer: no
Explanation:
The nation of Warring Wizards should not be considered a nation because they all live in different places and only 2 of them speak Russian.
Which of the statements agrees with the base pairing rules in a DNA strands
Answer:
the offspring of two parents will have 50 percent of his or her gene's from their mother and the other 50 from their father and the gene's will determine what the child will have like the eye color and hair color shape of their nose and other things that are inherited
Explanation:
All of the following are ways in which DNA technology plays a role in medicine except identifying mutations. Producing insulin and growth hormone. Tracking how a condition is passed between generations. Examining paternity.
DNA technology plays a role in medicine except identifying mutations when EXAMINING paternity. It involves the determination of the biological father.
DNA technologies refer to the genetic engineering techniques used in medicine and biotechnology for diverse purposes.
For example, DNA recombinant technologies can be used to produce insulin, which is a hormone required for the treatment of individuals suffering from diabetes.
DNA paternity tests are genetic tests whose objective is to determine nucleotide (DNA) polymorphisms and thus indicate whether a man is another individual's biological father.
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Answer: Its Examining Paternity
Explanation:
Edge 2022
the type of cell division that results in four haploid cells is known as
Answer: Meiosis
Explanation:
In three to five sentences, describe the advantages and disadvantages of these maps in modeling mitosis.
ii am confused blease elaborate
so sorry
Which mineral(s) have a black (or greenish-black) streak? Check all that apply.
sulfur
quartz
magnetite
pyrite
Answer:
Magnetite and pyrite
Explanation:
Their streaks are black
Magnetite is a mineral with an extremely high iron content. Magnetite is black or brownish-red with a black streak.
Magnetite - black
Pyrite -- greenish to brownish black.
What is so special about magnetite?Magnetite is a mineral with an extremely high iron content. Magnetite is black or brownish-red with a black streak. On the Mohs hardness scale, it has a hardness of about 6.Magnetite is most commonly used as an iron ore in the production of steel. Other uses include using it as a catalyst in the Haber process to produce ammonia, as a pigment in paints and ceramics, and as magnetic micro- and nanoparticles in a variety of processes and materials.Magnetite is an abundant raw material found in the Mountains and Mountains Caves, as well as the Jellyshroom Cave and Lost River.To learn more about : Magnetite
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which compound is orgaic
Answer: organic compound, any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen. The few carbon-containing compounds not classified as organic include carbides, carbonates, and cyanides.
How many variables can a scientist change during a scientific investigation?
Answer:
Three
Explanation:
how widespread was yellow fever during the 1600s and 1700s?
Answer:
The first yellow fever outbreaks in the United States occurred in late 1690s. Nearly 100 years later, in the late summer of 1793, refugees from a yellow fever epidemic in the Caribbean fled to Philadelphia. Within weeks, people throughout the city were experiencing symptoms.
Does cellular respiration occur in all living things?
Answer:
yes it does
Explanation:
Cellular respiration occurs in the cells of all living things.
What is unique about active sites?
A: active sites provide cells with energy.
B: active sites are specific to certain substrates (reactants).
C: active sites store the genetic information of cells.
The Unique feature of Active sites is that active sites are specific to certain substrates (reactants)
Active sites are specific regions of an enzyme where substrate molecules bind in other to bring about a chemical reaction.
The active site is made up of amino acid which forms temporary bonds with the substrate otherwise known as the binding site and the residues which brings about a reaction of that substrate.
Active sites are specific to certain substrates (reactants). Therefore, option (B) is correct.
Active sites are vital to enzymes, proteins that aid biological processes. They have a distinctive form that matches their substrate molecules. This specificity allows only particular substrates to bind to and interact with the active site, catalysing processes. This is called the "lock and key" or "induced fit" model.
Enzymes' catalytic action depends on active sites. A substrate attaches to an enzyme's active site and changes conformation, lowering the reaction's activation energy. This speeds up the reaction. After the reaction, the products are released and the enzyme's active site can bind to another substrate. Therefore, option (B) is correct.
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It takes energy for an organism to produce a particular structure such as a stripe on a clover leaf that is otherwise plain.
Why might cyanide-producing clover produce striped leaves?
Answer:
increases its ability to resist predation because the snails that eat it die
In general, two types of white clover can be found in a variety of habitats around the world. The first has plain green leaves, while the second produces cyanide as a defensive strategy against herbivores and signals its presence with white stripes on the leaves.
What are defensive behavior?Claws, teeth, disguising, poison, imitation, and adaptations such as echolocation are all common defense mechanisms. Some are uncommon but extremely effective.
A nonhuman animal's behavior to avoid of been hurt or killed by another.
This could include defensive aggression against a potential predator or a member of its own species, from its own group or from another group, or animal escape actions to avoid the source of harm.
In general, two types of white clover can be encountered in a variety of habitats worldwide.
The first has plain green leaves, whereas the second, as a defensive mechanism against plant eating organisms, produces cyanide and signals its presence with white stripes on the leaves.
Thus, cyanide-producing clover produce striped leaves.
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HELP I DONT UNDERSTAND THIS
What is the most likely explanation of the data shown below?
A 3 column table with 6 rows. Column 1 is labeled Year with entries 0, 1, 2, 3, 4, 5. Column 2 is labeled Dark moths with entries 50 percent, 59 percent, 68 percent, 80 percent, 95 percent, 100 percent. Column 3 is labeled Light moths with entries 50 percent 41 percent, 32 percent, 20 percent, 5 percent, 0 percent.
a.
There has been a drought in the area that is affecting all life forms.
b.
The population of natural predators of the moths has gotten smaller.
c.
The moths are living in an environment with light trees.
d.
The moths are living in an environment with dark trees.
Answer:
The correct answer is D. The moths are living in an environment with dark trees.
Explanation:
In general, the data shows the population of light moths increases over time, while the population of light moths decreases to the point it disappeared. This would likely occur if there was an environmental change that allowed dark moths to have survival and reproductive advantage over light moths. This includes if the trees are dark because in this scenario dark moths have a better chance to avoid predators and reproduce, while light moths would have a lower chance to survive because predators can find them easily and this leads to the decrease in light moths population shown in the chart.
how do bacteria associated with legumes provide nitrogen to the plant in a usable form
A. they use it in a chemical reaction producing ammonia
B. they make it into air bubbles and release it
C. they dissolve it in water
D. they get it from sunlight
HELPP!!! BRAINLIEST OF CORRECT!!!
How can increased genetic variation help some offspring to survive?
the salivary glands under the tongue are described as
Answer:
A tissue in our mouth that produces saliva to help swallow food! :)
Where do humans get the majority of their carbon from? (think biomolecules)
Answer:
Carbon is the most important element to living things because it can form many different kinds of bonds and form essential compounds.
Explanation:
like this plz <3
WIll GIVE BRAINLIEST!!!!
Answer:
Both A and B
Explanation:
This was on my test today and I got it correct.