Answer:
- Many factors affect rigor mortis, such as the type of clothing the person was wearing. True
- Experts from different sciences agree that the definition of death is the end of life. True
- Blowflies are one of the first insects to arrive at a dead body and are very useful in determining the time of death. True
- Livor mortis refers to the color of a dead body. True
- The only two manners of death are natural death and homicidal death. False
- Mechanism of death describes what has occured in the body to cause death. True
- The presence of drugs in a corpse cannot be determined by a chemical analysis of larvae found feeding on the body. True
- In the first 12 hours, a dead body cools about 1 degree F per hour. False
- Within minutes of a death, certain insects are attracted by the smell of the first stages of decomposition. True
- The Body Farm is a fictional account of the work of a country coroner. False
Explanation:
Death refers to the permanent cessation of the biological activities in an organism as a whole. Rigor mortis refers to a recognizable sign of death, which is caused by different changes in the muscles after death. Blowflies are insects that can be attracted by the smell of dead and decomposing bodies because they need to identify warm-moist and protein-rich sources to develop their eggs. Livor mortis is the red/blue/purple discoloration in the body skin after death. The manners of death can be divided into 1-accidental, 2-natural, 3-suicidal, 4-homicidal, and 5-undetermined. The mechanisms of death refer to the specific physiological derangements that can lead to the cessation of life (e.g., a heart attack), whose understanding can be essential to elucidate a criminal case. The presence of drugs in a dead body can be determined by an autopsy. The rate at which a dead body cooling depends on the relationship between the body temperature and environmental temperature (e.g, elevated body temperatures and cool environmental conditions are known to increase this value). A body farm can be defined as a research facility where the decomposition of dead bodies can be examined.
How are convection currents involved in the process?
Compare the movement of oxygen and carbon dioxide across the cell membrane. (4 marks)
help pls answer in paragraph form :)
Answer:
Molecules naturally disperse from areas of higher concentration to lower concentration.
As oxygen-rich (and carbon dioxide-poor) blood travels by a cell the oxygen diffuses through the cell membrane to the area of lower concentration inside the cell. It can do this easily because the oxygen molecule (O2) is very small and has no charge or polarity. The oxygen is used up rapidly by mitochondria. This rapid consumption causes oxygen to constantly move into the cell from the blood.
The mitochondria creates carbon dioxide (CO2) as a waste product of cellular respiration (the process that makes energy for your body). Because the CO2 is of a higher concentration in the cell than in the blood passing by, this gas continually diffuses out of the cell. It too is small and uncharged so it can pass through cell membranes easily.
These movements require no energy (in the form of ATP) on behalf of the cell.
Explanation:
if a specimen takes up one quarter of the field of view (0.500 mm), what is the size of the specimen in micrometers (um)?
Answer:
Explanatio1 n/4*0.500*10^3=125
Question 4
Which BEST describes why certain traits led to an increased frequency within the population of
medium ground finches?
A
because the traits were acquired
B
because the traits were favorable
С
because the traits were inherited
D
because the traits were mutations
Answer:
Explanation:
c
Based on the graph, which of these conclusions is correct? (2 points)
a
Heat is not added in portions BC and DE.
b
Heat is not added in portions AB and CD.
c
Change of state takes place in portions BC and DE.
d
Change of state takes place in portions AB and CD.
Answer:
The answer is "Option c".
Explanation:
Throughout the given question, Option c is acceptable which is based on the graph. The status of parts BC and DE are significantly changed because the temperature in the parts BC (0 degrees Celcius) & DE (100 degrees Celcius) is relatively stable to only the template would also have changed from ice and water into the vapor.
A population of 1000 birds exists on a small Pacific island. Some of the birds are yellow, a characteristic determined by a recessive allele. The others are green, a characteristic determined by a dominant allele. A hurricane on the island kills most of the birds from this population. Only ten remain, and those birds all have yellow feathers. Below are several statements about this hypothetical situation. Please write 1-6 and next to each number write T if true of Fif false.
1) Assuming that no new birds come to the island and no mutations occur, future generations of this population will contain both green and yellow birds.
2) Assuming that no new birds come to the island and no mutations occur, future generations of this population will contain only yellow birds.
3) This situation represents diversifying selection. 4)This situation represents directional selection.
Answer:
1) False
2) True
3) False
4) True
Explanation:
(3 and/or 4 may be wrong, but 1 and 2, i'm positive they aren't0
1 is false and 2 is true because recessive alleles x recessive alleles = reccessive alleles, and since yellow is recessive, and you have no green birds, there is no possibility of having green birds without at least one green bird parent.
(I hope that makes sense)
I believe 4 is true because Directional selection occurs when a single phenotype is favored, which is what happens here.
I'm not too sure about 3 though, sorry
Hope it helps!!
Helpppppp!!!!
Which feature is an example of psychological adaptation?
explain why in some families, all children are of the same sex
Answer:
Because their families have the same chromosomes{x for mother & x,y for father}.Answer:
the mother gives out automatically the x chromosome, and the father can either give an x or y chromosome. some men more often give out more of a certain chromosome. the chromosome the father gives determines the gender of baby. x is girl and y is boy
What best describes the endocrine system
A. system of transport
B. network of hormone-producing glands the control actions of the organism
C. network of tissues that respond and send messages
D. it is the network of nerves that coordinate bodily functions
Answer:
B
Explanation:
I took bio last year
The cells were kept in a dilute salt solution. They were then transferred to distilled
water.
Explain what will happen to each of these two cells when they are placed into distilled water.
When plant cells are placed in salt solution their appearance is different to when they are placed in distilled water. ... Therefore, water moves out of the cell across the partially permeable membrane by osmosis and the cell becomes flaccid as the cell membrane peels away from the cell wall
I point
Bactrian camels, drcanedarves, llamas, and alpacas are all members of the same taxonomic farníly, Camelidae. Members of this family all have two tores, no homes,
true canine teeth, and a split upper lip. The family Camelidae originated in North America. The physical features of animals in this family and the family's
goopraphical origin provide evidence that all these animals -
have slowly evolved to become herbivores
live in the same type of ecosystem
have a common ancestor
exchanged DNA at some point in the past
Answer:
Have a common ancestor
Explanation:
All of these animals share many distinct traits ,while being in many different areas of the world
The student wants to see the cells at a greater magnification. Describe the steps that she should take.
Gradually turn the crude focus knob until you can see the cells. Turn the fine focus knob slowly until the cells are in focus and visible.
What is magnification?Magnification is the process of enlarging something's apparent size rather than its physical size.
This enlargement is measured by a calculated number known as "magnification." When this number is less than one, it refers to a size reduction, also known as minification or de-magnification.
The magnification of a compound microscope is the product of both lenses, so if the microscope has a 10x eyepiece and a 40x objective, the total magnification is 400x. Magnification is defined as the ratio of the image size to the object size.
The student should use the adjustment knobs to bring the sample back into focus after selecting the x40 or x10 objective lens.
Thus, these steps are necessary to see cell's magnification.
For more details regarding magnification, visit:
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wich best describes how mRNA is used by a cell
Explanation:
where are options??????????????
?Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell's ribosomes (the structures in which protein synthesis takes place); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein ...
Answer: Pretty sure its option D that is the correct answer. Transcription of DNA results in the formation of mRNA. A polypeptide chain is formed when codon sequences of DNA reach the ribosome, delivering DNA sequences to the ribosome.
Explanation:
I can't see the choices but I've done this activity before and that's how I know
what happens to one's body when they starve
there hungry
...................
Answer:
The body lacks a proper circulation of oxygenated blood, hence abnormality in respiration.
Containers of ice cream are sold by volume, not by weight. Some ice cream manufacturers pump air into the ice cream before packaging it. Why does this practice make the ice cream more expensive to the consumer?
Jane wants to test if strawberries that are kept cold will rot or stay edible. She places a strawberry in the refrigerator and records the date. What variable should be controlled?
Answer:
I think it is the time or the degree of the cooling ability of the refrigerator
Define “mutualism” in your own words. PLEZ DO NOT COPY AND PASTE. I NEED IT ASAP PLEZ
Which of these is an example of a chemical change?
A. Breaking a tree branch
B. Burning a piece of wood
C. Melting ice
D. Dissolving salt in water
SMIT
This is the question I need help with.
Answer:
D
Explanation:
Answer: it would likely be D
Explanation: the question isn't necisarily testing how much you know about spirit bears, or where they live because they gave you that information. they are asking for a summary on what you can conclude about the bears
help pls pls plsssss
Answer:
the evidence points to increase of carbon dioxide in the atmosphere. There are many reasons, but you could probably go with deforestation, unregulated emissions--burning fossil fuels, industry and transportation.
Yeast undergo anaerobic respiration (fermentation), where glucose is broken down into two (2) ATP and two (2) pyruvate. This pyruvate is then used to form what waste product?
The pyruvate is then used to form Ethanol [tex][C_2H_5OH][/tex] and Carbon dioxide [tex][CO2_][/tex].
What is Anaerobic respiration?Anaerobic respiration is defined as respiration using an electron acceptor other than molecular oxygen where oxygen is not the final electron acceptor, the process still uses the respiratory electron transport chain.
Anaerobic respiration is described as the process in which there is incomplete oxidation of glucose in the absence of oxygen which is commonly known as fermentation.
One type of fermentation is alcohol fermentation where the pyruvate is decarboxylated [tex](CO_2 leaves)[/tex] to form acetaldehyde. Hydrogen atoms from NADH+. H+ are then used to help convert acetaldehyde to ethanol. NAD+ results.
Thus, the pyruvate is then used to form Ethanol [tex][C_2H_5OH][/tex] and Carbon dioxide [tex][CO2_][/tex].
Learn more about Anaerobic respiration, here:
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what sex chromosome is carried by the egg?
Answer:
Y
Explanation:
Someone pls help me ill give out brainliest pls don’t answer if you don’t know
Answer:
4
Explanation:
because of the displacement
A small number of birds arrive on an island from a neighboring larger island. About twice a year, one or two more birds from the neighboring island arrive. These new arrivals: Group of answer choices tend to speed up adaptation to new food plants speed up the process of speciation accelerate differentiation between the two populations tend to slow divergence of the two populations
Answer:
Hello. None of the answer options is correct, as the new arrivals delay adaptation to new food plants.
Explanation:
The arrival of new birds increases competition for food. This makes the birds that have just arrived have some difficulty in accessing food, as they will have to compete with the birds that are already on the island. This makes the novice birds look for food plants they already know, which delays their adaptation to feeding new plants they do not know.
Uranium atoms are split to create a tremendous amount of energy in a _____ power plant. Help now i put you brainlest
Answer:
nuclear
Explanation:
uranium is used in nuclear powerplant
other powerplant don't use uranium, they use wood(biomass) , geothermal energy(geothermal) , and water(hydroelectric) .
Brainliest please
In a non-mutated DNA strand, what base pairs with guanine?
Answer:
Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
Explanation:
Answer:
cytosine pairs with guanine.
A- Briefly describe the biotechnology methods that would have been used to produce these results.
B- How are the bands from the jeans and the shirt similar? How are they different?
C- Based on these results, what conclusions might a prosecutor present to a jury during a criminal trial?
Answer:
a. teh use of a electrophoresis machine after the dna has been processed using enzymes would give the bands shown on the gel
b.the bands from teh jeans and shirt show that the shirt was made from materials taht include teh material the jeans were made from
c. a prosecutor may conclude to the jury that the defendant had blood only on their shirt
How does Biology affected Tundra
Answer & Explanation:
Humans have changed the landscape through the construction of residences and other structures, as well as through the development of ski resorts, mines, and roads. Hunting, oil drilling, and other activities have polluted the environment and have threatened wildlife in tundra ecosystems.
HELP!!!! FAST!!!! 20 POINTS!!!! You are a traffic accident investigator. You have arrived at the scene of an accident. Two trucks of equal
mass (3,000 kg each) were involved in a rear-end accident at a stop sign. Here is what you know:
• Truck 1 started from rest at the top of a 22-meter hill and coasted toward the intersection.
.
Truck 2 was on a flat stretch of road at the bottom of the hill directly in front of Truck 1.
At the bottom of the hill, Truck 1 was going 20 m/s; Truck 2 was going 35 m/s.
.
There were no skid marks left by Truck 2. The collision occurred at the stop sign where Truck 2 had
stopped
• After the collision, both trucks moved together in the same direction at 10 m/s before slowly rolling
to a stop.
You must now push Truck 2, using 1,000 N of force, 8 meters off to the side of the road so no one
else gets hurt.
1. How much work was done to bring truck 2 to a stop? 2. If tuck 2 came to a stop In 15 seconds, how much power (in watts) did it take to stop truck 2 at the sign by applying force to the brakes? 3. What is the final combined momentum of the trucks right after the accident? 4. Assuming that there are no other no conservation forces involved, what impulse was given to each truck during the collision? A. Truck 1: B. Truck 2:
Answer:
1) Kinetic energy of the truck 1 is 600,000 joules.
Kinetic energy of the truck 2 is 1,837,500 joules.
2 a)Potential energy of truck 1 is 646,800 Joules.
b) Energy lose by the truck 1 just got converted into heat and sound energy during the collision.
Step-by-step explanation:
Mass of the truck 1 and truck 2,m = 3000 kg
Velocity of the truck 1, = = 20 m./s
Velocity of the truck 2, = 35 m./s
1. Kinetic energy of the truck 1:
Kinetic energy of the truck 2:
2.a) Energy loose by the truck 1:
Initial height of the truck on the hill = 22 m
At that height potential energy will be maximum:
Potential energy of truck 1 at that height =
b) Energy lost by the truck 1 just got converted into heat and sound energy during the collision.
Justify why the pituitary gland is the master hormone
A. It stimulates the production of other glands hormones
B. Its located at the brain
C. It is the strongest gland
D. It is the most intelligent gland
Answer:
The correct answer is - A. It stimulates the production of other gland's hormones.
Explanation:
The pituitary gland is also known as the "master" gland of the endocrine system. It stimulates or regulates other glands and the secretion of hormones of many of the other endocrine glands.
Its ability to control the function of the other glands and hormones gives it its name of master gland. The size of this gland is like a pea and found at the base of the brain.