PLSSS HELP very important test can not fail
What causes the expression of a recessive trait?
A) two dominant factors
B) one dominant and one recessive factor
C) two recessive factors
D) one dominant gene
Answer:
C two recessive since it gives a high chance of a recessive trait
Explanation:
Answer: C. Two recessive factors
Explanation: Good luck! :D
Let's use red hair for example - r
And we'll say that brown hair is dominant - R
You won't get red hair from RxR, the gene isn't in the punnet square. (Not A.)
Rxr would be always be Brown hair and they carry the red hair gene. (Not B.)
The dominant gene is the opposite of the recessive trait. (Not C.)
Prokaryotes live in extreme environments, where eukaryotes cannot live. List at least three such environments where you would expect to find prokaryotic cells, but likely not eukaryotic cells.
Answer:
Hyperthermophiles (above 80°C).
Acidophiles (usually at pH 2.0)
Alkaliphiles (extremely high pH value 9 to 13)
Extreme halophile
Explanation:
Phage are viruses that must infect bacteria to reproduce. Viral genomes do not contain all the genes needed to produce all proteins necessary for DNA replication, RNA transcription, and protein translation; instead the viruses force bacterial proteins and enzymes to express phage genes instead of bacterial genes.
Phage are very adaptable, and their behavior depends on whether conditions are favorable or unfavorable for making more phage.
When bacteria are plentiful (favorable conditions), viral DNA within the bacteria remains separate from the bacterial chromosome, and the virus forces the bacteria to make more virus. When the amount of virus becomes too much for the cell to hold, the membrane ruptures, and viruses are released to infect surrounding bacteria. This is known as the lytic cycle.
When bacteria are scarce (unfavorable conditions), the viral DNA within the bacteria becomes integrated into the bacterial chromosome. The bacteria survive and are still able to reproduce; viral DNA is transmitted to daughter cells when the bacteria reproduces. This is known as the lysogenic cycle.
As you just read, phage depend on bacteria to reproduce. Phage can be maintained by infecting a culture of bacteria with a strain of phage, and then plating the bacteria on an agar plate to grow.
Suppose that you isolate two mutant strains of phage - one strain cannot enter the lytic cycle and the other strain cannot enter the lysogenic cycle. You also grow wild-type phage as a control. You see three different phenotypes:
A plate with no missing bacteria- the lawn of bacteria is intact
A plate with spots/circles (called plaques) where there are absolutely no bacteria in the circles
A plate with spots/circles (called plaques) where there are some bacteria in the center of the circles.
Based on what you know about what happens in each cycle, match the plating results with the identity of the strain.
Drag each plate into the correct category.
Answer:
A plate with no missing bacteria- the lawn of bacteria is intact----strain with lysogenic cycle.
A plate with spots/circles (called plaques) where there are absolutely no bacteria in the circles---- lytic cycle
A plate with spots/circles (called plaques) where there are some bacteria in the center of the circles----- wild type phage.
Explanation:
The strain which cannot enter the lytic cycle having no missing bacteria on the plate because the virus remains inside the bacterial cell while on the other hand, the other strain that cannot enter the lysogenic cycle having no bacteria on the circle due to infection of virus spreads throughout the cells and no bacterial cell remains uninfected. One plate having some bacteria and some space having no bacteria due to virus of wild type that shows both cycles.
BRAINLIEST!!!
Sinkholes are extremely dangerous because they occur quickly and without warning. Sinkholes are a result of both mechanical and chemical
weathering.
Match the descriptions with the correct type of weathering that lead to the formation of sinkholes.
Limestone rock breaks into smaller pieces
Lime stone is rock dissolved by water underground
Pressure Changes on the surface cause the ground to collapse
When calcium carbonate rock sits in the water , it forms bubbles
WHICH ONES ARE MECHANICAL WEATHERING FACTORS AND WHICH ARE CHEMICAL WEATHERING FACTORS!!!
Answer:
The two limestone sentences are chemical weathering.
Pressure Changes is Mechanical.
Calcium carbonate rocks it's in water is chemical.
Explanation:
I'm pretty sure these are right!
which characteristic do stable ecosystems tend to have?
A. a high amount of biodiversity
B. a low number of species
C. a location far from the tropics
D. a location near one of the Earth's poles
Answer
it is A
Explanation:
just took quiz and got it right
What is believed to be the main cause of most mass extinctions throughout geological history?
Answer:
was caused by global warming that left ocean animals unable to breathe. The largest extinction in Earth's history marked the end of the Permian period, some 252 million years ago
Explanation:
Heparin, a highly negatively charged glycosaminoglycan, is used clinically as an anticoagulant. It acts by binding several plasma proteins, including antithrombin III, an inhibitor of blood clotting. The 1:1 binding of heparin to antithrombin III seems to cause a conformational change in the protein that greatly increases its ability to inhibit clotting. What amino acid residues of antithrombin III are likely to interact with heparin
Answer:
Positively charged amino acids
Explanation:
Heparin is an acid polysaccharide that has a strong negative charge due to the sulfate groups on its glucosamine residues. This negative charge confers to heparin anticoagulant activity. The negatively charged groups in the heparin molecule can interact with positively charged (basic) residues, such as arginine (Arg) and lysine (Lys) of plasma proteins. For example, it has been shown that lysine amino acid residues of antithrombin III may be involved in the binding with heparin.
The process shown in the diagram produces oxygen and sugar. Which
process uses oxygen and sugar as reactants?
0
Chloroplast
Mitochondrion
Sugar
CO, +H,0
ATP
Heat
Respiration
O A. Cellular respiration
B. Water cycle
c. Transpiration
D. Photosynthesis
Answer:
Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.
Explanation:
so ts Cellular Respiration
The process uses oxygen and sugar as reactants is the Cellular respiration as it produces ATP as the end product.
What is cellular respiration?Celullar respiration, the system via way of means of which organisms integrate oxygen with meals molecules, diverting the chemical power in those materials into life-maintaining sports and discarding, as waste merchandise, carbon dioxide and water.
Oxygen and glucose are each reactants withinside the system of mobile respiratory. The foremost made of mobile respiratory is ATP; waste merchandise consist of carbon dioxide and water.
Read more about the Water cycle:
https://brainly.com/question/282587
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Which natural resources did early humans need for basic survival?
A. Early humans needed tools made from rocks.
B. Early humans needed material to make boats with sails to get from place to place.
C. Early humans needed water, plants and animals for food.
D. Early humans needed fresh water and clean air.
Answer:
i think C. Early humans needed water, plants and animals for food.
Explanation:
Water, plants and animals are the basic needs for survival other then tools made out of rocks, even though A could be the right answer too.
Identify What are the functions of proteins in
organisms
what are your thoughts on the big bang theory? do you have doubts, or do you agree with it?
What DNA sequences control when and where the gene is turned on ?
Answer:it’s controlled by the eucaryotic gene
Explanation:
Which of these events would lead to an increase in the size of a population of squirrels
More squirrels are born than die.
Some squirrels emigrate in search of food.
New predators are added to the ecosystem.
A large number of squirrels die because of a forest fire.
Answer:
More squirels are born than die
In your own words, describe the way the nervous system is organized.
Answer:
lol here!
Explanation:
The human central nervous system contains the brain, spinal cord, and retina. The peripheral nervous system consists of sensory neurons, clusters of neurons called ganglia, and nerves connecting them to each other and to the central nervous system.
also
The nervous system consists of two parts, shown in Figure 1: The central nervous system (CNS) consists of the brain and spinal cord. The peripheral nervous system (PNS) consists of nerves outside the CNS.
I hope this helps, it's late so sorry I couldn't write an explanation. Just explain this picture in words.
what best describes a steppe
Answer:
a wide expanse of desert. a grassland with few trees.
Explanation:
.
9.
I generally remain in the nucleus [in eukaryotic cells).
11.
I am made up of nucleotides.
Answer:
ADN
Explanation:
Pues el ADN permanece en el núcleo de las células eucariotas y en las procariotas está disperso por el citoplasma y sobre todo está formado por nucleótidos
What are the necessary conditions for autotrophic nutrition and what are its byproduct ?
➜ The conditions necessary for autotrophic nutrition are sunlight, chlorophyll, carbon dioxide (CO2) and water (H2O).
The byproducts of autotrophic nutrition are water and oxygen.
Answer:
Carbon dioxide, water, chlorophyll pigment, and sunlight are the necessary conditions required for autotrophic nutrition. Carbohydrates (food) and O2 are the by-products of photosynthesis.
what is liver in mammalian body
Answer: The liver is an organ only found in vertebrates which detoxifies various metabolites, synthesizes proteins and produces biochemicals necessary for digestion and growth. In humans, it is located in the right upper quadrant of the abdomen, below the diaphragm.
Explanation:
3. What do shaded shapes represent
Answer:
A completely shaded circle or square indicates that a person expresses the trait. A circle or square that is not shaded indicates that a person neither expresses the trait nor is a carrier of the trait. A black X represents death of the individual.
an organism that feeds on plants and animals
Answer:
Human
Explanation:
A human is an organism that feeds on plants such as fruits and vegetables and also on animals such as cows, pigs, and chickens.
How can I get my own karyotype?
If you guys don't know what karyotype is, it's a photo of person's full set of chromosomes. So basically my crush keeps making fun of me and said "You're so d*mb, you probably lost a chromosome" but I didn't lose any. So I want to sign up to get my own karyotype to prove I have a full set of chromosomes. Do you guys know which site I can sign up and pay to get my karyotype done? Thx
Answer: really any doctor
Explanation: karyotype tests are done typically during pregnancies, i’m sure a medical facility could do it.
Where is cellular respiration involved/what on the picture goes through it? Is there more than one object?
. Adaptation that allows an organism to blend in with its surroundings, preventing it from being eaten or allowing it capture prey.
A. mimicry
B. fitness
C. camouflage
D. genetic drift
Answer:
C
Explanation:
Which of the following is the term for a red clay soil commonly found in the southeastern portion of the United States?
O mollisol
O ultisol
Oudoll
O aquoll
Answer:
Ultisols
Explanation:
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earth science: fossils question pls help
Answer:
Layers A and B show cratures that would most likely be found in the ocean (they have fins, etc.) then the next layer has no animals and after that the animals beofre are no longer seen. This must mean that the creatures went exticnt due to an envoirmental issues, in this case its a volcanic explosion (as seen in the key in the corner were the shaded area is indicated as volacanic ash). In layer D, we see a plant, this shows us that the envoirment is now land. After that is another layer of volcanic ash and then F. were we see the previous plants and animlas with the inclusion of 'bird'. I think this means that the envoirment has more greenier wether from the nutrients rich soil (due to the volcanic ash) or another factor.
Explanation:
NEED ANSWER
IN PHOTOSYNTHESIS DO YOU LOSE OR GAIN ATONS
Answer:
you gain
Explanation:
10. Which element in magma is most abundant?
O A. Oxygen
O B. Silicon
O C. Aluminum
OD. Iron
Answer:
A. oxygen
Explanation:
element in magma is most abundant is oxygen.
Answer:
Hmmm let me think.... I got it the answer is A.
Vascular plants are divided into two main groups
a. True
b. False
True/False: The law of conservation of energy applies to the cycle of photosynthesis and cellular respiration.
Answer:
True,Every chemical reaction obeys the law of conservation of mass.