Answer:
pure potassium is a soft waxy metal that can be easily cut with a knife
phase at STP soild
In a certain plant, the allele for red flower color (R) is dominant over the allele for white flower color (r). A cross is performed between a plant with red flowers and a plant with white flowers. The offspring are 47 plants with red flowers and 51 plants with white flowers. What are the genotypes of the parent plants?
Answer:
Rr and rr
Explanation:
The genotypes of the parents would be heterozygous red (Rr) and true-breeding white (rr).
Since the allele for the red flower color (R) is dominant over that of the white flower color (r), for a cross to produce both red and white flower color plants, the red parent must be heterozygous (Rr) and the white parent true-breeding (rr).
Rr x rr
Rr Rr rr rr
Rr = red
rr = white
If the red parents is true-breeding
RR x rr
Rr Rr Rr Rr
All their offspring would be red without any white flower color.
Hence, the genotypes of the parent are Rr and rr.
Carbon cycles through living things, water, the atmosphere, and the rocks that compose Earth. Some processes
absorb carbon dioxide and other processes release
carbon dioxide.
Of the following options, which would NOT increase the total amount of carbon dioxide in the Earth's atmosphere?
A)
the burning of fossil fuels
B
volcanic eruptions
cellular respiration
D
photosynthesis
27
Answer:
A
Explanation:
if you have 6 pairs of homologous chromosomes, how many chromosomes do you have ?
Answer:
12
Explanation:
because that is how the body works
Bacteria and fungal spores can only contribute to indoor air pollution.
a/True
b/False
Answer:
The correct answer is - b. false.
Explanation:
Air pollution refers to small harmful substances or particles that get into the air and cause harmful effects such as breathing difficulty and disease associated with breathing. These particles can be chemicals, gases, dust, or biological pathogens and allergens such as bacteria and fungal spores.
Air pollution can be indoor air pollution or outdoor pollution, biological pathogen and allergen present more in indoor setting or system but they do not contribute only to indoor air pollution but all.
True or False:
Our immune system normally protects from cancer cells that arise within our bodies due to the action of red blood cells. *
Answer:true
Explanation: HOPE THIS HELPS
true.
have a great day feel free to correct me if I'm wrong
,
PLeaseeee hellpppppp
Somatic stem cells are extracted from _____
A. An Egg
B. An Embryo
C. Developed Organs
D. A blastocyst
Answer:
A. an egg
Explanation:
The process of somatic cell nuclear transplant involves two different cells. The first being a female gamete, known as the ovum (egg/oocyte). In human SCNT (Somatic Cell Nuclear Transfer) experiments, these eggs are obtained through consenting donors, utilizing ovarian stimulation.
Select all that apply.
Which of the following are methods of molecular biotechnology?
selective breeding
recombinant DNA
O hybridization
O cloning
induced mutations
DNA profiling
Answer:
o hybridization thhtyhht
is biological control effective than chemical control of crop protection?
Answer:
No
Explanation:
There are different ways or methods of protecting crops from pest and disease infestation. Two of those ways as mentioned in this question are the chemical control and biological control. Biological control of crop protection involves the use of natural enemies of crop pests, which happens to be living or biotic organisms while chemical control entails the use of pesticides and herbicides to control crop pests and diseases.
Among these two methods, the chemical control is more effective because it yields instantaneous results and gets rid of pests and diseases faster. However, in terms of sustainability, the biological control method is more eco-friendly. Hence, based on this question, biological is not more effective than chemical control of crop protection.
How do oceans contribute to creating winds?
A.Ocean currents create momentum that pull air with them.
B.Ocean water vapor pushes air causing it to flow in different directions.
C.Ocean energy is transferred to or from the air creating density differences.
D.Ocean water vapor eventually condenses into clouds and wind.
Answer:
Explanation:
Ocean energy is transferred to or from the air creating density differences.
Oceans contribute to creating winds as ocean energy is transferred to or from the air, creating density differences. The correct option is c.
What is ocean energy?The ocean waters are continually changing. Wind, water salinity, temperature, ocean floor topography, and the earth's rotation all influence ocean current flow patterns.
The majority of ocean currents are caused by wind and solar heating of surface waters near the equator, while some are caused by density and salinity fluctuations in the water column. In contrast to tidal currents along the shore, ocean currents are typically consistent and travel in one direction.
The transfer of energy from the ocean to the atmosphere causes the atmosphere to cool. The energy travels in a disturbance, which in an ocean is a wave, therefore the wave generates energy and transports it through the water.
Therefore, the correct option is C. Ocean energy is transferred to or from the air, creating density differences.
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Plz help last question on my test
50.Which type of cell must be produced more frequently than the other types?
1)brain cells
2)red blood cells
3)muscle cells
4)liver cells
5)stomach lining cells
Answer:
muscle cell is produced fast
Answer:
2
Explanation:
red blood cells
hey when you are done with your test notify me we need to talk
What causes antibiotic resistance?
- Only using antibiotics when you are also doing radiation therapy
- Only using antibiotics when you are also doing chemotherapyAny use of antibiotics causes resistance
- Any use of antibiotics causes resistance
- We do not know
Answer:
an apple causes antibiotic resistance
What is the answer to this?
Answer:
Nucleic Acids
Explanation:
Because I just know
What did you include in your response?
Photosynthesis occurs in plants.
Photosynthesis uses sunlight as a source of energy.
Photosynthesis converts light energy to chemical energy.
I included other information.
Answer:
Photosynthesis occurs in plants
Explanation:
I got this correct.
Cancer cells are *
1)mutated cells inherited from a parent
2)mutated cells that occur by chance
3)cells that divide more than 30 rounds of cell division
4)all of the above
Thank you boys and girls.
On test plz hurry, answer only if you know
Explanation:
4 is the correct answer if it helps you then plzz mark me brainliest
35. This graph shows the rate of bacteria reproduction over a two-hour period. In just three hours, one bacterial cell will have produced over 2000 new bacteria as a result of asexual reproduction. Explain what could be true about the offspring.
During a reproductive process, paired chromosomes often swap lengths of DNA at random. This process further increases the number of new genotypes created in each generation This helps explain why, in
species that reproduce sexually, no two siblings (except identical twins) look exactly alike. With all that recombination, you can end up with your mother's eyes, your father's nose, and how that combines
qualities from both parents. SC 012 L 16.14
Which mechanism produces this genetic diversity?
Y chromosome syndrome
Asexual reproduction
Crossing over
Mitosis
Crossing over is when the alleles cross over and pair up, resulting in the genotype for an offspring.
What is Crossing over?When it comes to genetics and genomics, the term "crossing over" describes the DNA exchange that takes place between paired homologous chromosomes (one from each parent) during the formation of egg and sperm cells (meiosis).
This mechanism leads to novel allele combinations in the gametes (egg or sperm) generated, ensuring genetic variety in any baby born.
Crossing over is a cellular process that happens during meiosis when chromosomes of the same type are lined up. When two chromosomes — one from the mother and one from the father — line up, parts of the chromosome can be switched.
Therefore, Crossing over is when the alleles cross over and pair up, resulting in the genotype for an offspring.
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A large region that has a particular type of climate that effectively influences the types of plants and animals that inhabit each ecosystem is a(n) ___________________.
As thermal energy is added to a substance, which of the following changes can be predicted?
O
Spacing between particles will decrease
Vibration of individual particles will increase
Temperature of the substance will decrease
The pressure of the air around the substance will increase
Answer:
Vibration of individual particle will increase
Explanation:
This is due to the fact that whenever any substance of matter is increased in temperature, the atoms begins to move away from each other. Take for instance an ice cube for example, when an ice cube (a solid) is heated it becomes water, (a liquid). Proving that when a substance is heated, no matter the density of the material, the individual particles, or atoms, begins to spread apart.
Is duralumin a mineral, a rock, or neither?
Answer:
Duralumin is an aluminium alloy.
Explanation:
Duralumin is a kind of mineral.
What is Duralumin?There isn't a single chemical composition for duralumin because it is an alloy of copper, magnesium, manganese, as well as aluminum that can change based on its intended application. 4.4 percent copper, 1.5 percent magnesium, 0.6 percent manganese, and 93.5 percent aluminum make up a typical alloy.
What is mineral?A mineral would be an inorganic solid that forms in nature and have an organized atomic structure and a known chemical composition. Even while it may seem like a mouthful, if you break it down, it becomes clearer. Minerals have been created naturally. They are not human-made. They have inorganic, minerals.
Another of the earliest varieties of age-hardenable aluminum alloys goes by the brand name Duralumin. The word is a mix of aluminum and Dürener.
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In the natural blank method, the natural physical, chemical, and biological processes in soil and water gradually break down pollutants.
what's blank?
Answer: Attenuation
Explanation: Natural attenuation: in this method, the natural physical, chemical, and biological processes in soil and water gradually break down contamination or pollutants into harmless components. It helps reduce contamination concentration and soil and water to acceptable levels. Examples of natural attenuation processes include
- dilution or dispersal of pollutants in moving water
- volatilization or reduction of pollutants into vapor
- absorption or attachment of balloons to soil or vegetation
These processes are accomplish naturally. Little or no human intervention is necessary.
Answer:
In the natural attenuation method, the natural physical, chemical, and biological processes in soil and water gradually break down pollutants.
Explanation:
help me please i don’t understand!! i’ll mark you brainlylist
Answer:
The answer would be B.
Explanation:
How many times do you need to keep self-fertilizing the colored plants to get a purebred colored plant?
a. Once more.
b. Twice more.
c. Indefinitely, until you get all colored offspring.
d. Indefinitely, until you get all white offspring.
Both starch and cellulose are polysaccharides made of individual glucose molecules. Why then can humans digest starch but not cellulose
Answer:
Starch and cellulose are two very similar polymers. In fact, they are both made from the same monomer, glucose, and have the same glucose-based repeat units. ... Your body contains enzymes that break starch down into glucose to fuel your body. But we humans don't have enzymes that can break down cellulose
Which of the following statements BEST describes ASEXUAL reproduction?
Question 8 options:
A single-celled organism uses meiosis to create two identical copies of itself.
Two multi-celled organisms uses meiosis and fertilization to create a unique offspring.
Two multi-celled organisms use mitosis and fertilization to create a unique offspring.
A single-celled organism uses mitosis to create two identical copies of itself.
The statement “ A single-celled organism uses mitosis to create two identical copies of itself” best describes asexual reproduction
The statement which best describes the mode of asexual reproduction is that a single-celled organism uses mitosis to create two identical copies of itself. Thus, the correct option for this question is D.
What is Asexual reproduction?Asexual reproduction may be characterized as a mode of reproduction in which a new offspring is produced by a single parent. This type of reproduction does not involve the fusion of gametes or a change in the number of chromosomes.
Asexual reproduction is homologous to the process of mitosis. This is because both of them involve the production of two identical daughter cells from a parental cell.
While meiosis produces four daughter cells which are genetically unique to the parent cells. It is the characteristic feature of sexual reproduction that is opposite to an asexual one.
Therefore, the correct option for this question is D.
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Explain how an action potential and graded potential are different
Answer:
Graded potentials are brought about by external stimuli (in sensory neurons) or by neurotransmitters released in synapses, where they cause graded potentials in the post-synaptic cell. Action potentials are triggered by membrane depolarization to threshold.
Which behavior shows a way that animals defend their territory?
A. Several dolphins swim around a school of fish and take turns
feeding
B. A bee returns to the hive and shares the location of food with
other bees.
C. Wolves work together to chase or kill any wolves that are not in
their group
D. Giraffes and zebras compete for water at the same watering hole.
Answer:
i think its d
Explanation:
because they are fighting over the water.
What is the process that allows plants to grow
photosynthesis? girl idek i need points
Answer:
photosynthesis allows plants to grow. they convert solar energy from the sun into sugars used for staying healthy.
Explanation:
hope this helped, have a nice day ♥
Living things must be able to obtain and use material and energy to grow, develop and reproduce. What term in Biology is used to describe this characteristic of life
Answer:
homeostasis
Explanation:
list five evidence of photosynthesis and describe any two
Answer:
Hi there, I will help you
Explanation:
It houses glucose, which plants use for food. The presence of starch in a leaf is reliable evidence of photosynthesis. That's because starch formation requires photosynthesis.
What is the element or compound in the Phosphorus Cycle and why is it important to living things?
Answer:
Phosphorus is an essential nutrient for animals and plants. It plays a critical role in cell development and is a key component of molecules that store energy, such as ATP (adenosine triphosphate), DNA and lipids (fats and oils). Insufficient phosphorus in the soil can result in a decreased crop yield.
Explanation:
Answer:
Thus, phosphorous is crucial to living organisms because ATP is crucial. Phosphorus is also important because it makes up our DNA. Phosphate is part of the so-called ladder legs which Adenine, Thymine, Guanine, and Cytosine bind to see. It holds this same job in RNA.
Explanation: