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loris [4]
3 years ago
15

A population of mice occupies a tree stump in a forest. During the last decade, there has been little change in the number of mi

ce in the population. Which of the following would likely cause the number of mice to decrease quickly?
A a decrease in disease
B an increase in predation
C a decrease in competition
D an increase in length of mating season
Biology
2 answers:
natima [27]3 years ago
4 0

Answer:

The correct answer would be B an increase in predation.

Predation is one of the many biological interactions in which one organism is benefited and other is harmed. In this interaction, one organism kills the other one to get nutrition out of it.

The one who kills is known as predator and the one who is killed is known as prey.

In nature, mice serves as a prey for many organisms such as snake, owl, hawk, cat, dog etc. Hence, there are concrete chances of increased predation of mice in an area.

Other reasons for the decrease in a population of any organism in nature can be: increased competition, habitat destruction, mutation, new disease or fast rate of transmission of disease etc.


AlekseyPX3 years ago
3 0

If a population of mice occupies a tree stump in a forest and the number of mice has decreased, it is likely due to an increase in predation. The answer is letter B. When a mouse is in the forest, it will be part of the ecosystem there. When it looks for food, they can also become food for other animals.

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A solution that is hypotonic to a cell has fewer solutes than the cell. the same concentration of solutes as the cell. more solu
Simora [160]

Answer:

2(h - 8) - h = h - 16 2. 4(x - 3) + 5 = 1 3. 70 = -7(-2 -2z) 4. -2x + 4 = 2(4x-3)-3(-8+4x

Explanation:

2(h - 8) - h = h - 16 2. 4(x - 3) + 5 = 1 3. 70 = -7(-2 -2z) 4. -2x + 4 = 2(4x-3)-3(-8+4x

5 0
3 years ago
Please give a small paragraph quickly summarizing the what, when and how of each of the following techniques: PCR, DNA gel elect
Anuta_ua [19.1K]

Answer:

All are used to resolve questions in molecular and biochemistry/biotechnology

Explanation:

PCR: resolution of an amplicong on agarose gel to chech size after thermocycling

DNA gel electrophoresis,

Recombinant DNA, A DNA fragment that it attached to another such as a reporter, commonly used is GFP attached to protein of interest to track movement

Cloning, Duplicate an amplicon, insert into a vector, transform this vector into a bacteria that is designed to make multiple copies of itself

Northern blots, Method used to detect different sizes RNA from a mixture of other products

Southern blots, method used to detect different sizes of DNA similar to the idea of a Northern Blot

Western blots, Resolution of protein sizes by running the protein through an acrylamide gel in an ionic buffer

Antibody production (polyclonal and monoclonal),  Generating an antigen against a protein using different parts of the same protein (polyclonal) or only a specific sequence of the protein not a variety of antigens from the full length (monoclonal)

ELISA, enzyme-linked immunosorbent assay is used to check the presence of a protein

FRET, Transmission energy of one molecule to another, it is usually included in the detection of colors in fluorescence microscopy

FRAP, this method will is called Fluorescence recovery after photobleaching, a microscospy measurement

FACS, this is a type of cell sorting Fluorescence-activated cell sorting

Fractionation by centrifugation, Lysis of agents such as cells that can be lysed by spinning in a centrifuge

Chromatography, separation of chemical thru a media by colors

Fluorescence microscopy,  use of fluorophore to detect specimen under a microscope a specific wavelength

Coomassie staining,  procedure used to stain an acrylamide gel or membrane to show protein presence

Silver staining, use of a silver colloid to change the way proteins are seen on a Western blot or under a microscope

His tag, a string of histidine residues attached to a protein for easy manipulation/detection

GST tag, Glutathione S-transferases is a group of proteins used in protein purification an option other than His tag

Confocal microscopy,

FISH, The generation of a nucleotide probe used in DNA sequence detection in histology

PCR, Polymerized chain reaction used to amplify selected region of DNA

DNA library, the collection of gDNA of a specific specie or tissue

cDNA library, collection of the coding sequence of a organism/tissue

Microarrays, the platform used to detect thousands of gene sequences at once

Sanger sequencing, Method used to derrive DNA sequence developed by Frederick Sanger by incorporating a single nucleotide at a time

GFP, Green fluorescent protein, a reporter protein used in recombination protein creation

Bright field microscopy, microscopy that uses light or natural light to detect samples

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Phase contrast microscopy, Microscopy technique used to detect the different states of matter of a specimen

Fluorescence microscopy, use of fluorophore attached to sample for investigation

Transmission electron microscopy, uses beams of electrons to pass through a sample to then create an image

Scanning electron microscopy,  the surface of a sample is scanned with a beam of electrons to generate an image

X ray crystallography, determining a structure of a protein my using an x-ray technique

2D PAGE electrophoresis,  separation of proteins by two phases sizes and charges

NMR,  Nuclear magnetic resonance, spinning of all the nuclei and measurement of the energy that it gives off.

Mass spectrometry Protein sequencing technique based on weight

4 0
3 years ago
Which is an example of asexual reproduction?
olchik [2.2K]
Hey there,

Question : <span>Which is an example of asexual reproduction?

Answer : Budding- It is when an organism develops from the bud of a plant through cell division.

Hope this helps :))

<em>~Top♥</em>
</span>
3 0
3 years ago
Which of the answer choices is a cross section of the highlighted region of the mushroom in the picture
Daniel [21]

Answer:

<em>The mushroom in the picture and the option choices are included in the attached image. below...</em>

The highlighted region of the mushroom in the picture represents the mushroom's <em>"Gills"</em>, and paticularlly the multicellular structure carrying the <em>Hymenium</em> called <em>"the basidiocarp"</em> aka basidioma; the Hymenium or underside of the mushrooms is comprised of vertical plates arranged radially, and if a cross section of this is exposed by making a straight cut through the basidiocarp on a microscope, it would appear as option: (A. )

4 0
3 years ago
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aliina [53]

Answer:

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Explanation:

A <u>ligand</u> corresponds to a molecule considered a signal or a messenger, while the <u>receptor</u> is a protein on the cell surface, with the capacity to accept a ligand.

Ligands and receptors constitute pairs that complement each other, so that <u>each receptor can bind to a specific ligand</u>, similar to what happens with a key and a lock.

Once the ligand-receptor complex is formed, changes occur inside the cell, which define a certain effect.

8 0
3 years ago
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