Answer:
Trigger mechanisms utilize two basic designs. It is either located directly underneath the latch that holds the string in a cocked position or the latch mounted behind the trigger. A safety prevents accidental release of a bolt and may engage manually or automatically once a crossbow is cocked.
what determines how closely related 2 species are?
Answer:
Before: (Darwin did) Physical features and behavior
Now:
DNA Testing
Explanation:
Similarities are often easy to see when one looks at two organisms that evolved from a common ancestor, and until recently, looking at physical features and behavior was the only way to determine how closely related two organisms are. However, now scientists can also analyze DNA to discover how closely organisms are related. Every living creature has DNA, which has a lot of inherited information about how the body builds itself. Scientists can compare the DNA of two organisms; the more similar the DNA, the more closely related the organisms. This method can also help when looks are deceptive. One example of looks being deceptive is: The bat and the crow both have wings, and the squirrel does not. From this, one may think that bats and crows are more closely related than bats and squirrels, while the opposite is indeed the case.
What are the 3 domains of life? Provide an example for each
Crossing over is a process that occurs during formation of gametes. How does crossing over lead to genetic variation in offspring?
Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. When cells divide during meiosis, homologous chromosomes are randomly distributed to daughter cells, and different chromosomes segregate independently of each other.
https://bio.libretexts.org
Sexual reproduction allows for more genetic diversity than asexual reproduction.
options:
True
False
Answer:
True.
Explanation:
A mouse's tail gets cut off. If the mouse has babies later, how will this affect the length of the tails of its offspring
Answer:
no it will not affect the length of the tails of any of the offspring.
4. Two objects were lifted by a machine. One object had a mass of 2 kilograms, and was lifted a t a speed of 2 m/sec. The other had a mass of 4 kilograms and was lifted at a rate of 3 m/sec.
Question a. Which object had more kinetic energy while it was being lifted?
Question b. Which object had more potential energy when it was lifted to a distance of 10 meters? Show your calculation.
Explanation:
a) Case1, by the formula, ke=½mv².
m=2kg, v=2m/s
ke = ½×2×2² = 4J
Case2, by the formula, ke=½mv².
m=4kg, v=3m/s
ke = ½×4×3² = 18J
therefore, the second object has more kinetic energy.
b) Case1, by the formula, pe = mgh
m=2kg, g=9.8m/s²(not given)(can consider 10m/s² when given), h= 10m
Pe1(write 1 in subscript) = 2×9.8×10= 196J.
Case2, by the formula, pe = mgh
m=4kg, g=9.8m/s²(not given)(can consider 10m/s² when given), h= 10m
Pe2(write 2 in subscript) = 4×9.8×10= 392J.
so, the object 2 has more potential energy.
hope this helps you.
The gel below shows a result of the experiment you designed using the DNA of three different individuals (S1-S3). It also shows a negative (C-) and a positive (C ) control, as well as a DNA marker. Why did S2 have three bands
Restriction enzymes recognize specific nucleotidic sequences. The molecule with no recognition site will not be digested. Individual S2 probably had molecules with the recognition site and others with a different sequence.
--------------------------
A restriction enzyme is a degradative polymer that recognizes and cuts up specific nucleotide sequences in DNA.
Restriction enzymes can produce cohesive cuts or blunt (abrupt) cuts, depending on the recognition sites.
The frequency in which the restriction enzyme will produce the cuts depends on the recognition sequences and the number of bases that compose them.
So restriction enzymes cut DNI molecules into different short sequences of varying lengths.
These pieces are called minisatellites and exhibit the existing variation from one person to the next.
These short sequences can be separated by using gel electrophoresis and will express a pattern of differentiation.
When the nucleotidic sequence of the DNA molecule does not include the recognition site, the enzyme will not cut this fragment. The enzyme does not digest this molecule.
Since the negative control does not have a recognition site, it is not digested by the enzyme.
The positive control is digested, meaning that these molecules carry the recognition site.
Probably DNA molecules from individual S1 do not have the recognition site either.
The enzyme recognizes the sequence in DNA from individual S3 and cuts it into two fragments.
The lane of Individual S2 includes both options: digested and not digested DNA. This means that the sample taken from this individual included DNA
⇒ carrying the sequence, and
⇒ not carrying the recognition sequence.
So enzymes digest molecules carrying the recognition sequence, and the other ones remain undigested.
Probably, individuals S1 and S3 are h0m0zyg0us, while individual S2 is heter0zyg0us.
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Related link: https://brainly.com/question/14479025?referrer=searchResults
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https://brainly.com/question/13695898?referrer=searchResults
Arteries have high blood pressure
and are fairly deep in your body.
What is the function of the
arteries?
A
delivering OXYGEN-RICH blood to the body
В.
delivering OXYGEN-POOR blood back to
the heart
Using Alternative
Server
All Rights Reserved.
Answer:
A. Delivering Oxygen-rich blood to the body.
Explanation:
I hope this helps!
Answer:
a. delivering oxygen - rich blood to the body
Explanation:
Arteries are the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body.
Question 7 of 10
What is the difference between a scientific law and a scientific theory?
O A. A scientific law has been proved with scientific evidence. A
scientific theory can change when new evidence is found that
does not support the theory.
B. A scientific law is supported by research. A scientific theory is only
an educated guess.
C. A scientific law describes how natural events happen. A scientific
theory is an explanation of natural events.
D. A scientific law involves mathematics. A scientific theory is a
description based on observations.
Answer: I belief its B. A scientific law is supported by research. A scientific theory is only an educated guess.
-Like theories, scientific laws describe phenomena that the scientific community has found to be provably true. Generally, laws describe what will happen in a given situation as demonstrable by a mathematical equation, where as theories describe how the phenomenon happens.
Why does the moon appear to change shapes in the sky?
A. The gravity on the moon from the Earth changes the shape.
B. The light reflected off the moon from the Earth changes.
C- The amount of sunlight
reflected off the moon changes its shape as seen on Earth.
D- The relative position of the Sun, Moon, and Earth changes the amount of reflected sunlight that we see.
Answer:
D
Explanation:
In the figure above, where does the neurotransmitter dopamine have its effect?.
*30 POINTS* PLZ HELP
The following list of events happens during meiosis:
Prophase I: Crossing over between homologous chromosomes occurs.
Metaphase I: Tetrads line up at the metaphase plate.
Anaphase I: Tetrads are separated.
Telophase I: Nuclear envelopes reform around the separated chromosomes.
Prophase II: Chromosomes condense.
Metaphase II: Chromosomes line up at metaphase plate.
Anaphase II: Sister chromatids separate into daughter chromosomes.
Telophase II: Nuclear envelopes reform around the daughter chromosomes.
Identify the answer choice that correctly lists the events from above that lead to new genetic combinations in the gametes.
(1 point)
1, 2, and 5
5 and 6
5, 6, and 7
1 and 2
Answer:
let me take the test i will tell you after
Explanation:
Edpuzzle: Fermentation - Amoeba Sisters
Answer:
=amoeba sisters
Explanation:
Mastication is performed by which of the following accessory digestive organs?
Answer:
d. All of the above
Explanation: is correct
Why are the intestines and stomach not weighed during an autopsy.
Answer:
All the internal organs are examined for injury and disease and weighed. They Intestines and stomach are not weighed. The pathologist drains the intestines in a sink to remove any undigested food and feces that remain.
All the internal organs are examined for injury and disease and weighed. They Intestines and stomach are not weighed. The pathologist drains the intestines in a sink to remove any undigested food and feces that remain.
What is autopsy?A post-mortem examination, often known as an autopsy, is a specialist surgical process used to ascertain the cause and manner of death. The medical explanation for why a patient passed away is called the cause of death.
The circumstances surrounding the death are known as the mode of death. The following causes of death are recognized in natural, accident, homicide and unknown.
Our understanding of disease is constantly expanding thanks to autopsies. The information obtained through autopsy enables professionals to better comprehend disease processes, make accurate diagnoses, enhance treatment, and perhaps even help other patients who are currently afflicted with a similar condition.
Therefore, All the internal organs are examined for injury and disease and weighed. They Intestines and stomach are not weighed. The pathologist drains the intestines in a sink to remove any undigested food.
To learn more about autopsy, refer to the link:
https://brainly.com/question/6460613
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whats the process of (kepler-186f) fusion between these atoms that occurs in all-stars
Answer: the main element
Explanation: vamp
The space that an organism in an ecosystem lives in is called a
A) community
B) population
C) habitat
D) niche
llo
Answer:
Answer C) Habitat.....
What is the shape of an onion cell?
Answer:
The general shape of an onion cell is square or rectangular. The interior of the cell is easy to see and focuses well for microscopic observation.
Explanation:
Answer:
An onion cell's general shape is either square or rectangular in shape. The interior of the cell is easy to see and focuses well for microscopic observation, thanks to its transparent structure.
Explanation:
Hope it helps:)
Explain what must happen before a cell can divide
Answer:
the cell must go through mitosis and chromosomes in the nucleus must double
help pls pls pls pls
Answer:
2) =b
Explanation:
I don't know others unu
propulsion of a sperm cells occurs due to ___________and It gets energy from____________/_
Answer:
propulsion of a sperm cells occurs due to the sperm's tail containing a large number of proton channels called Hv1 and It gets energy from the seminal plasma.
Explanation:
the term meaning the freeing of a kidney from adhesions is:
Answer:
Ureteroplasty is surgery to remove the stricture.
Explanation:
who developed a theory of evolution identical to darwin’s?
Answer:
Alfred Wallace
Explanation:
The following list of events happens during meiosis:
Prophase I: Crossing over between homologous chromosomes occurs.
Metaphase I: Tetrads line up at the metaphase plate.
Anaphase I: Tetrads are separated.
Telophase I: Nuclear envelopes reform around the separated chromosomes.
Prophase II: Chromosomes condense.
Metaphase II: Chromosomes line up at metaphase plate.
Anaphase II: Sister chromatids separate into daughter chromosomes.
Telophase II: Nuclear envelopes reform around the daughter chromosomes.
Identify the answer choice that correctly lists the events from above that lead to new genetic combinations in the gametes.
(1 point)
1 and 2
1, 2, and 5
5 and 6
5, 6, and 7
Meiosis is a form of cell division that occurs in the sex chromosomes. This form of division ensures genetic diversity and also allow for the chromosome set to be halved.
The events from above that lead to new genetic combinations in the gametes include:
Prophase I: Crossing over between homologous chromosomes occurs.
Metaphase I: Tetrads line up at the metaphase plate
(1 and 2) option a.
During meiosis, possibilities of new genetic combinations occurs which allows for variations to exist between the offspring and parents. These ensures that offspring are not entirely identical to the parents and also allow for survival and other benefits.Learn more about genetic combinations: https://brainly.com/question/8418041
Many fishes and other organisms that live in the deep ocean produce light. What are two ways in which this light might be useful?
Answer:
Explanation:
Bioluminescence is used by living things to hunt prey, defend against predators, find mates, and execute other vital activities. Some species luminesce to confuse attackers. Many species of squid, for instance, flash to startle predators, such as fish.
Why would you use sodium hydrogen carbonate in an investigation
Answer:
Investigating photosynthesis. The effect of light intensity on photosynthesis can be investigated in water plants. ... Sodium hydrogen carbonate - formula NaHCO 3 - is added to the water to supply carbon dioxide - a reactant in photosynthesis - to the plant.
Explanation:
hope this helps
What are the two types of reactions enzymes facilitate?
The segment of the nephron between the proximal and distal tubules that loops down into the medulla of the kidney and returns back to the cortex is called the
In order to see cells clearly in a section of plant tissue, which magnification would you have to use? А x5
B x 10
С X100
D X1000
Ratio
L guess you idiot
100!!! Points
Part A
Tectonic plate movement is the reason why northern California has a very different landscape than southern California. Two different tectonic plates, each moving in different directions, border the western side of the North American Plate. Use the map to identify the two tectonic plates that border the North American Plate to the west.
map of the world's major and minor tectonic plates
Part B
On the map, take a close look at the boundary along southern California and Mexico’s Baja California Peninsula. The arrows on the map show the direction and speed of the plates along this boundary in millimeters per year. Based on the speed and direction of the arrows, identify the type of plate boundary at this location. Which landforms or events are likely to occur there as a result? (Hint: It may be helpful to model the motion of the plates using your hands or pieces of paper.)
a map of North America with the fault lines marked
Answer:
Where's the map?
Explanation: