Answers
19. place moth balls in the closet and observe after several days.
20. whenever wax or a candle burns it turns from solid to liquid but again at room temperature it turns to solid
21. evaporation, condensation, precipitation
22. it produces new substances
23. vinegar Bubbles when baking soda is added
24. steam
Related Questions
For young men of age 20, there have been 150 rounds of DNA replication during sperm production as compared to only 23 rounds for a woman of age 20. That is a 6.5-fold greater number of cell divisions and proportionately greater opportunity for new point mutations. Yet, on average, 20-year-old men contribute only about twice as many new point mutations to their offspring as do women. How can you explain this discrepancy
Answers
Answer:
A plausible hypothesis is that deleterious germline mutations in sperm cells are removed by natural selection since sperms have to compete to fertilize the egg
Explanation:
Sperm cells need to travel through the cervix in order to reach the uterus and fertilize the egg. During this process (which is called 'fertilization'), approximately 300 million sperm cells have to compete in a race to reach an egg. During fertilization, the majority of sperm cells die off quickly because male germinal cells carry mutations that lead to abnormalities (e.g., many sperms have double heads, others no tail, etc). The sperm cells are considered to be physiologically weak because their normal functions can be easily disrupted by mutations and, simultaneously, they are under strong selective pressure to be selected during the sperm race. In consequence, deleterious germline male mutations are expected to be eliminated by natural selection, thereby sperms are selected before fertilization so only the strongest ones can compete in the race to fuse with the egg cell and thus develop one zygote.
a dark soil is usually rich in
Answers
what does forage mean?
Answers
Answer:
to obtain food in the wilderness
Answer:
(of a person or animal) search widely for food or provisions.
food such as grass or hay for horses or cattle
The following table describes some landforms.
Landform
Created By
Found in
Wind erosion Water or glacial erosion Depositions Deserts Coasts Mountains
Yes
No
Yes
Yes
No
No
| A
Yes
No
B
Yes
Yes
Yes
No
No
Yes
с
No
No
No
Yes
No
No
D
No
No
No
No
Which landform is most likely a coastline?
Landform A
Landform B
O Landform C
Landform D
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Answer:
landform D is most likely a cost line
Describe the path of light as it travels through a microscope.
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1. Complete the unfinished DNA strand from below.
2. What m-RNA strand would be formed from the DNA strand that you just made in #1 above?
3. Using the codon chart in the lesson, what amino acids would be aligned from the following m-RNA strand?
A U G G C G G A A
4. If the first base in the sequence above (#3) were mutated to a C, what would that do to the amino acid sequence?
5. If you were given a single tiny chunk of a nucleic acid strand and asked if it was DNA or RNA, what things would you look for to tell?
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Explanation:
1. is T G C A T because it is a DNA as it contains thymine.
2. so mRNA strand would be U G A C G U A as it is in RNA so it would be uracil with adenine.
3. is Met- Ala- Glu
4. if is mutated to a C then it would be C U G G C G A A
so it would be Leu-Ala-Glu.
5. you can look for if it contains thymine or uracil. If thymine then DNA if Uracil then RNA. you can also see if it is double or single strand. if double than DNA if single than RNA.
hope this helps you :)
the heat of the sun is received by conduction true or false
Answers
Answer:
Heat from Sun reaches us by the process of radiation. ... It takes place in the form of electromagnetic radiations. In space (where there is Sun) there is no atmosphere, no medium, so convection can't take place. By radiation only heat can be transmitted by Sun to earth.
Answer:
false
Explanation:
lol its radiation
In the image below, what molecule is being released by cellular respiration
and used in photosynthesis?
A. 02
B. CO2
C. H20
D. C6H1206
Answers
What are the different types of agar plates?
Answers
Answer: Blood Agar Plates, Nutrient Agar Plates,MacConkey Agar Plates,Bile esculin agar plates,Mannitol salt agar and Sabouraud dextrose agar
A state in which an object is in motion. OA. static B. dynamic OC. vector OD.scalar
Answers
Answer:
the answer is gonna be c
Explanation:
that is all
The cells inside our nerves are called what?
Answers
Answer:
Cells of the nervous system, called nerve cells or neurons, are specialized to carry "messages" through an electrochemical process. The human brain has approximately 86 billion neurons. ... Neurons are surrounded by a cell membrane. Neurons have a nucleus that contains genes.
Explanation:
Answer:
Neurons are the information-processing cells of the nervous system. They are categorized as receptors, interneurons, or effectors, depending on their function. The dendrites of a neuron provide an extended receptive surface for the cell, increasing greatly the number of synaptic inputs.What are the products of photosynthesis?
C6H12O6 + 6H20 + 602
C6H12O6 + 302 + 6H20
C6H12O6 + 302 + 3H20
C3H6O3 + 602 + 6H2O
Answers
Answer:
the first answer
Explanation:
C6H12O6 + 6H2O + 6O2
A triplet of bases in a template strand of DNA is GAT. What would be the corresponding codon for mRNA?
СТА
CUA
CTU
CUA (This one is wrong)
I don't know why there are two CUAs, but if someone could please help. This is confusing for me. Please explain & no false answers. Thanks much in advance!
Answers
Answer:
CUA
Explanation:
Chances are your teacher accidentally put the same option twice and marked one of em incorrect. You infact selected the correct answer because CUA is correct.
DNA has 4 bases: ATGC (Apples on Trees = A - T, & Cows eat Grass = C-G)
RNA has 4 bases: AUGC (RNA lacks the base T so A binds with U instead).
So for template strand GAT, the mRNA made from this codon has complimentary pairing based on RNA so G binds with C, A binds with U, and T binds with A.
A triplet of bases in a template strand of DNA is GAT, the corresponding codon for mRNA - CTU
DNA is a two-stranded molecule. Each strand is a polynucleotide composed of A (adenosine), T (thymidine), C (cytidine), and G (guanosine) in a sequence.
Adenine always bonds with thymine, and guanine only bonds with cytosine. In RNA however, uracil is substituted for thymine instead. So, in transcription, adenine turns into thymine, and guanine turns into cytosine, and vice-versa.
Thus, A triplet of bases in a template strand of DNA is GAT, the corresponding codon for mRNA - CTU
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What purpose does numerous microvilli serve?
A) Absorbs nutrients
B) Absorbs vitamin/s minerals
C) Absorbs foods/glucose
D) Increases surface area for absorption
E) All of the above
Answers
Answer:
D) Increases surface area for absorption
Explanation:
Microvilli are microscopic structures found mostly attached to the epithelial cells of certain organs. Microvilli helps the organs their found to increase the surface area for the diffusion of substances.
For example, microvilli in the epithelial cells of the small intestine helps to increase the surface area for the absorption of nutrients in the blood.
The rapid diversification of species seen in the fossil record followed by long periods of stasis is part of the ________ model of evolution.
Answers
Answer:
punctuated equilibrium
Explanation:
According to the punctuated equilibrium model of evolution, the process of evolution involves a sudden spontaneous burst in the diversity of species (speciation).
This period is now followed by a long period in which the there is no change in the species. This period is known as the period of stasis or equilibrium.
Hence, the rapid diversification of species seen in the fossil record followed by long periods of stasis is typical of the punctuated equilibrium model of evolution.
Explain the evolution of altruism.
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Answer:
Altruistic behavior, such as sterile worker ants caring for the offspring of their queen, evolves only between related individuals through what is known as kin selection — or so many evolutionary biologists have thought since the 1960s.
biology b unit 10 workbook
Answers
Answer:
i also needed help w this
Explanation:
Which is a property of every homogeneous mixture? Each part of the mixture has the same appearance. The mixture is made up of a solid dissolved in a liquid. The characteristics of the mixture change within a single sample. The components of the mixture change within a single sample.
Answers
Answer:
Each part of the mixture has the same appearance.
Explanation:
Homogeneous mixture consists of substances that mix evenly. Therefore has same appearance.
A diagram shows a potato producing new tubers. Buds on the parent plant grow into stems that grow downwards called stolons. The end of each stolon develop in to new tuber.
1) Give two pieces of evidence which show that this is an asexual method of reproduction.
2) Explain why all the new tubers will be genetically identical.
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Answer/Explanation:
Asexual reproduction is a type of reproduction in which new organisms that are identical are formed form a parent without the fusion of male and female gametes and do not require fertilization. Offspring formed are usually identical genetically, and are referred to as clones of the parent. Usually, only one parent is involved.
1. Two pieces of evidence that shows the potato growing is an asexual method of reproduction are:
i. Only one parent is involved
ii. The new tubers are identical (clones of the parent)
2. Reasons Why the new tubers will be genetically identical:
i. They grow from 1 parent by asexual reproduction
ii. No mixing of male and female gametes, so no exchange of genes takes place
IN YOUR OWN WORDS, write the definition for the word Centromere.
-Thank you!
Answers
Answer:
a chromosome that links a pair os sister chromosome
Explanation:
each chromosome is made of two parallel strands called chromatids. and each pair of chromatids is connected at one point by a structure called centromere.
Answer:
is the constricted region of a chromosome that separates it into a short arm and along arm
or...is a specialized DNA sequence of a chromosome that links a pair of sister chromatids
Explanation:
during cell division , the chromosomes first replicate so that each daughter cell receives a complete set of chromosomes
TIME REMAINING
56:39
Which statement is true about inorganic compounds?
They are not made of atoms.
They contain carbon.
They are not made from living things.
They are all elements.
Answers
Answer:
They are all elements
Explanation:
1) INORGANIC COMPOUNDS ARE COMPOUNDS THAT ARE NOT MADE UP OF CARBON AND HYDROGEN.
2) They are also not made from living organisms, it's rather organic compounds that are made from living things
3) And for the 1st one, EVERYTHING! is made up of atoms because that is smallest unit or basic unit of matter
4) And so far all the inorganic compounds I've seen are elements, and that is the only valid answer.
Answer:
C
Explanation:
They are not made from living things.
Doctors finally understood why a child had difficulty sleeping. They discovered that she had a large tumor located in the part of her hindbrain called the _____
Answers
Answer:
The correct answer is - Pons.
Explanation:
The pons is located t below the midbrain and below the midbrain. It is a group of nerves that function as a connection between the cerebrum and cerebellum.
It is related to the various functions of the body such as sleeping, respiration, swallowing, bladder control, hearing, and many more. These functions
which of the following is a biotic factor
A)light intensity
B) food supply
C) pollution
D) temperature
Answers
Answer:
B) food supply.
Explanation:
The answer is B
In Osmosis, a cell becomes turgid when it:
A. expands from absorbing too much water.
B. bursts from absorbing too much water.
C. bursts from absorbing too much water.
D. contracts from absorbing too much water.
Answers
Answer:
A
Explanation:
This occurs when a plant cell is placed in a hypotonic solution.A solution were the external solution concentration is less than the internal concentration of the cell, causing water to rush into the cell.
During osmosis by absorbing too much water from outside the cell, a cell becomes turgid. The correct option is A.
What is osmosis?Osmosis is the passage of water molecules via a cell's partially permeable membrane from a solution with a large concentration of water molecules to a solution with a lower concentration of water molecules.
Osmosis occurs when the concentration gradient of water reaches zero or when the water's hydrostatic pressure equals the osmotic pressure.
Endosmosis and exosmosis are the two main types of osmosis that occur when water moves across the cell membrane. When cells are placed in a hypotonic solution, endosmosis occurs, which is the movement of water into the cell.
When cells are placed in a hypotonic solution, exosmosis occurs, which is the movement of water out of the cell.
Thus, the correct option is A.
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Which function is performed by both goblet cells and lacrimal glands?
digestion
stress regulation
protection
growth regulation
Answers
Answer:
protection
Explanation:
The correct answer would be protection.
Goblet cells are special cells found in the epithelial layers of small and large intestines and some other organs such as those associated with the respiratory tracts. They secrete mucin and create a protective mucous layer in the walls of the intestines.
Lacrimal glands on the other hand are exocrine glands found in the eyes. They secrete the watery component of the eyes which is made up of water, electrolytes, and protein. The fluid produced by the glands protects the eyes from drying out.
Hence, both goblet cells and lacrimal glands serve protective functions.
Orcas, or killer whales, are natural predators of sea otters. It has been observed that in regions where the sea otters are not present, sea urchins grow rapidly and destroy much of the natural kelp vegetation. Which of these statements is correct in this context?
Answers
Answer:
D) Sea otters are a keystone species as they prevent a herbivorous species from completely destroying a plant species.
Explanation:
Enzymes are _______. Enzymes are _______. made of protein permanently changed by the substrate made of protein, are catalysts, and permanently changed by the substrate made of protein and are catalysts are catalysts
Answers
Answer:
enzymes are biological catalysts.
Enzymes are catalysts. Therefore, option (4) is the correct option.
Enzymes are biological catalysts made primarily of proteins that accelerate chemical reactions within living organisms. As catalysts, enzymes lower the activation energy required for a reaction to occur, thus speeding up the rate of the reaction without being consumed or permanently changed themselves. Enzymes achieve this by binding to specific reactant molecules, forming enzyme-substrate complexes, which stabilize the transition state and facilitate the breaking and formation of chemical bonds during the reaction.
Once the reaction is complete, the products are released from the enzyme, and the enzyme remains unchanged, ready to catalyze further reactions. Enzymes play a crucial role in metabolism, cellular signaling, and many other physiological processes, enabling life to function effectively. Therefore, option (4) is the correct option.
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Your question is incomplete but your full question was:
Enzymes are _______.
made of protein permanently changed by the substrate made of protein, are catalysts, and permanently changed by the substrate made of protein and are catalystsare catalystsin your own words, what is the definition for Chromatin?
Answers
Explanation:
Chromatin is a substance within a chromosome consisting of DNA and protein. The DNA carries the cell's genetic instructions. The major proteins in chromatin are histones, which help package the DNA in a compact form that fits in the cell nucleus.hope it helps
stay safe healthy and happy..,In interstitial growth of cartilage ______. Multiple choice question. only new cells are produced only new matrix is produced news cells and new matrix are produced
Answers
Answer:
The correct answer is ''news cells and new matrix are produced''
Explanation:
Interstitial growth consists of the production of new layers of cartilage in the inner layer of the perichondrium. This process occurs because chondrocytes meet in the form of small groups, called isogens or cell nests, they are capable of dividing and the cartilaginous matrix is distensible. Daughter cells initially occupy the same gap but as they secrete new intercellular matrix they separate. These daughter cells can divide again, forming so-called isogenic groups, which are frequently found in growing cartilage.
Transcribe the information in DNA to mRNA. which RNA nucleotide can pair with the Thymine(T)at the beginning of the strand. Drag it into the DNA antisense strand to make a pair.
Answers
Answer:
Adenine can go with Thymine
Explanation:
