Forensic biologists analyze tiny DNA samples using PCR and STR loci analysis, comparing it with criminal DNA databases.
Forensic biologists analyze tiny samples of DNA found at crime scenes through a process involving DNA isolation, sequencing, and analysis. They primarily use polymerase chain reaction (PCR) amplification of short tandem repeat (STR) loci and electrophoresis to determine the length of the PCR-amplified fragment.
One of the main focuses is on mitochondrial DNA sequencing for forensics and comparing the DNA with a database of DNA profiles of known criminals. Forensic biologists play a crucial role in presenting their findings in court hearings, primarily working in crime labs of government agencies.
please help me!
1. what is the function of platelets in blood?
A. carrying oxygen
B. clot blood
C. makes antibodies
D. dissolves components of blood
2. who realized that fingerprints were unique to individuals?
A. Juan Vucetich
B. William Herschel
C. Johann Mayer
D. Jan Purkyne
1. Platelets are tiny blood cells that help your body form clots to stop bleeding. So B. Clot blood is the answer
which of these is a trace fossil A.dinosaur egg B.insect in amber C.dinosaur footprint D. wooly mammoth tusk
C. dinosaur footprint (because a trace fossil is the trace of an animal instead of the animal itself).
Answer: Dinosaur footprint
Explanation:
The trace fossil can be defined as the geological records of the biological activity. They are fossils but only their imprints can be seen they are not the living forms preserved.
The best known fossils are the dinosaur trackways. It can be defined as the impression which is made by the organism on the substrate.
The remains of the organic matter preserved in order to study about the organism. These traces shows the behavior of the organism and helps in studying about it.
What is one benefit of a nonrenewable resource, such as natural gas?
Generates large amounts of electricity
Less expensive over time
Produces pollution
Will run out eventually
Answer:
Generates large amounts of electricity
Explanation:
One of the few benefits of nonrenewable resources is that they can generate large amounts of power. One plant using natural gas to generate electricity can power up homes and building for thousands of miles. This in spite of the wasted energy in the whole process of transforming them to pure energy, around 60% of the energy is wasted.
As they are scarce, they become more difficult to find over time, to access them a lot of resources must be used. This means that over time they become more expensive. It all depends on therank of time you want to calculate costs.
Which event signals the brain to breathe?
A respiratory control center at the base of your brain controls your breathing. This center sends ongoing signals down your spine and to the muscles involved in breathing. These signals ensure your breathing muscles contract and relax regularly.
The actual event (not which part of brain) that signals the need to breathe is carbon dioxide concentration in blood. when CO2 conc is high in blood, the brain will tell the body to breathe.
What is menopause, when does it normally occur, and what causes it?
What is menopause?
Menopause is a condition in which the ovaries cutdown in producing hormones and eggs.
When does it normally occur?
It occurs when females stop having periods for over a year, usually females over the age of 45 get menopause, which is a normal part of aging for older females.
What causes menopause?
Women produce eggs every month, when they stop producing eggs and periods stop, then they start developing menopause.
Menopause is, when does it normally occur, and the causes it Menopause is the end of the menstrual cycle naturally.
Further explanationMenopause or physiological cessation of menstrual cycles associated with the elderly level of women. A woman who experiences natural menopause at all can not know whether a certain menstrual period is really the last menstrual period until one year has passed. Menopause is sometimes referred to as a life change.
At the age of forty, some hormonal changes associated with menopause symptoms begin to occur, which usually occurs when women enter the age of 45 to 55 years.
The cause is Hormone Change
ovarian degeneration becomes inactive due to a lack of formation of reproductive hormones such as estrogen. Due to the drastic decrease in the hormone estrogen, it cannot inhibit the production of LH and FSH so that the value becomes high and remains quite long.
A woman is said to experience menopause when menstruation has stopped for 12 months. Menopause is preceded by the appearance of various changes during the perimenopause, called menopausal symptoms. These hormonal changes also affect bone mineralization. Estrogen influences bone mineralization by activating osteoclasts. thus, decreasing estrogen levels in menopausal women will reduce bone density.
The symptoms that arise are
a. Vertigo
b. dry skin
c. memory loss
Learn More :About Menopause; https://brainly.com/question/3256449,
https://brainly.com/question/11847776
DetailsClass: College.
Subject: Biology.
Keywords: Menopause, Hormone , Woman
help please stuck on 2, 4, 5 on crossword
2 deoxycibose
4 mutation
5 dnafingerprint
In an ecosystem, there are many factors that affect how many organisms can survive there. Which of the following is one of those factors?
A.
color of flowering plants
B.
number of times humans have seen the area
C.
availability of water
D.
age of mammal species
I think C) availability of water is your best answer because alot of organisms count on water as a major resource because they need it to survive so a lack or a gain in the amount of water will majorly effect an ecosystem.
Answer:
availability of water because animals need water to survive
Explanation:
help please stuck on number
4 down
16 down
3 across
4 down is a mutation
16 down is Proteomics
3 across is amino acid (no space)
the answer would be 4 down
A 55-year old man is referred to your clinic. he has been sedentary all of his life, is gaining weight and wishes to get into better physical shape. he has never had any chest pain or shortness of breath when walking or climbing a flight of stairs. before recommending a vigorous exercise routine for this patient, you order what test?
In the given case, the client is recommended for ETT, that is, an Exercise Treadmill Test.
Various patients have underlying CAD, that is, coronary artery disease, however, it remains asymptomatic. Thus, prior to starting any new kind of intense activities after years of a sedentary lifestyle, it is suggested that the person should go for ETT to rule out any kind of underlying CAD.
An ETT records the heart's electrical activity on an ECG and takes the readings of blood pressure while one walks on a treadmill. It is usually done to check for any kind of heart disease, or to find of the treatment for heart ailment is efficient.
The light independent reactions could not take place without the high-energy products produced in the light dependent reactions. These high-energy products are ___________ and _____________.
NADPH
Carbon dioxide
PGA
ATP
PGAL
RuBP
The given blanks can be filled with NADPH and ATP.
The dark reactions or light-independent reactions of photosynthesis refers to the chemical reactions, which transforms carbon dioxide and other constituents into glucose. These reactions take place in the stroma, that is, the fluid occupied region of a chloroplast external to the thylakoid membranes. These reactions use the products of light-dependent reactions, that is, NADPH and ATP to do further processes.
A student wants to determine whether or not the flower is pollinated by an animal, such as an insect or bird. Which property of the flower would be most useful for making this inference?
To infer if a flower is pollinated by animals, examine characteristics like brightly colored petals, presence of nectar, specific scents, and shapes tailored for animal feeding traits; ultraviolet patterns for bees and tubular shapes for birds are indicative.
Explanation:To determine whether a flower is pollinated by an animal, such as an insect or bird, the most useful property to examine would be the flower's physical characteristics that are adapted to attract these pollinators. Brightly colored petals, the presence of nectar, particular scents, and specific shapes that cater to the pollinators' feeding mechanisms are key features. For example, flowers pollinated by bees may have ultraviolet reflectance patterns and are brightly colored in shades that bees can see, such as blue and yellow. Bird-pollinated flowers may exhibit large, bright red petals and have a long tube-like shape to accommodate the birds' feeding habits.
To infer if a flower is animal-pollinated, look for bright colors, sweet nectar, and a strong scent, which are adaptations to attract insects or birds for cross-pollination.
To determine whether a flower is pollinated by an animal such as an insect or bird, one should observe the flower's physical characteristics that are adapted to attract pollinators. The most useful property of the flower for making this inference would be the presence of bright colors, sweet nectar, and sometimes a strong scent. These features are developed by flowering plants to signal and provide rewards to potential animal pollinators, thus facilitating the process of cross-pollination which increases genetic diversity. For example, flowers that are tailored to be pollinated by bees might be brightly colored (excluding red which bees can't see) and have a tubular shape, while those pollinated by birds might be large and red with a long funnel shape.
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The moth species Biston betularia has two color morphs, or variants. One has a speckled white and black color, while the other is all black. In the early 1800s in England, the distribution was 10,000 speckled morphs to 1 black morph. That distribution changed dramatically between 1900 and 1950. By 1950, the distribution of the speckled morph had declined to less than 3% of the population and the black morph distribution increased to 97%. Which statement most likely explains this change?
A. A predator of the moth underwent steep decline, which reduced selective pressures on the moth.
B. A chance mutation occurred in one black individual, which gave an advantage to the black morph's ability to survive.
C. The changes are due to normal random fluctuations that might be observed in any population over time.
D. Changes in the environment changed each morph's ability to evade predation in different ways.
I think this one might be D. I used the process of elimination for this.
A: If the predator began to die out, then both morphs would have grown in population.
B: Changes in mutation usually happen over a greater period of time than just 50 years.
That leaves C and D. I know nothing of the normal random fluctuations, so I can't say for sure that this is right. Therefore, my mind views D as the right answer.
While mutation occurs over a great span of time, a change in environment can happen faster, and often kills off some species since they don't have the tools for survival.
What type of rock is likely to form where continental plates collide?
A. Extrusive
B. Igneous
C. Metamorphic
D. Sedimentary
Answer:
Metamorphic (c)
Explanation: I actually took this test and got it all right the answer is NOT igneous.