The Montreal Protocol of 1987 provided a global framework to phase out chlorofluorocarbon (CFC) production and use. A though the Montreal Protocol has led to a dramatic decrease in CFCs released into the atmosphere, stratospheric ozone destruction has decreased only slightly.
Answer:
True
Explanation:
1. Stern cells are different from other cells, as they are not specialized and can reproduce other unspecialized cells. There has been great controversy over the use of stem cells in the United States, especially when they are taken from fetal tissue. What are some possible benefits to humans of using stem cells?
plz hellllp
Answer:
Stem cell benefits:
Can repair limbs such as Arms cut off etc.
Can Repair cells and keep people from ageing
Can reduce the effect on diseases
Test new drugs for safety and how effective they are
Make people live longer and healthier lives
Explanation:
Humans aren't aware on how to harvest stem cells effectively in a way they work on humans tot heir full potential but the reasons I listed above are only the tip of the iceberg when it comes to what we can do with these.
Which statement best describes a characteristic of an ecosystem
Answer:
Infrastructure
Infrastructure is an important characteristic as it influences accessibility to the environment by land managers, and tourists alike. Unfortunately it can also increase the invasive potential introduced species, such as weeds and feral animals as road vehicles are well known to act as vectors for invasion of both weeds and feral animals. On the other hand roads improve access to implement various management programs, and also provide access for land users.
¿A que evidencia de la evolución hacen referencia los arboles evolutivos?
A.Embriologia
B.Registro fosil
C.Distribucion geografica
D.Grupos taxonomicos
E.Anatomia comparada
Answer:
B. Registro fósil
Explicación:
El registro fósil es la evidencia de la evolución a la que se refieren los árboles evolutivos. La relación entre organismos se puede averiguar estudiando fósiles de organismos. Los árboles evolutivos también se denominan árbol filogenético y muestran las relaciones evolutivas entre varias especies basadas en similitudes y diferencias en sus características físicas o genéticas. Se consideran similares aquellos organismos que tienen las mismas características físicas o genéticas.
What is true of a primary consumer?
A) Always omniverous
B) Sometimes a detrivore
C) Frequently autotrophic
D) Most likely herbivores
dos semejanzas y tres diferencias, entre los postulados griegos, y los postulados de Van Helmont y Needham de las teorías abiogenistas
In the early days of life on Earth, plants were exposed to extremely high doses of ultraviolet radiation, Constant UV exposure
resulted in some land plants developing narrow leaves with thick, waxy cuticles. Over many, many generations, these narrow
leaves evolved into needles.
Relate the development of plant needles to the occurrence of mutations,
A)
Plant needles adaptations for survival that some plants developed due to
high temperatures on Earth
B)
Plant needles are the result of leaf cell mutations that made some leaves
thick and waxy, while other leaves did not change,
Plant needles are the result of neutral mutations to leaf tissue that would
neither help nor harm the plants living in such a harsh environment.
D)
Plant needles were a beneficial mutation that increased survival of certain
plants that reproduced and passed the mutated gene to offspring,
Answer:
B I think.
Explanation:
As native mason bees visit flowers, they spread pollen while also consuming nectar from the plant. This is an example of symbiosis.
true or fasle
Answer:
True
Explanation:
Symbiosis is a type of relationship or interaction between two different biological organisms/species by which both are benefited. The bees such as mason bees are pollinators. Pollinators are animals (especially insects) that help the development of seeds and the fruit surrounding seeds by the pollination of flowers, i.e., by the transference of pollen from male anthers of a flower to the female stigma. During this process, pollinators eat nectar, which is a sweet energy-rich liquid secreted by flowers. In consequence, both species (i.e., plants and mason bees) are benefited from this interaction.
During action potential which of these statement is true?
a) Na+ goes outside the cell membrane
b) there is repolarization of cell membrane
c) there is depolarization of cell membrane
d) non of above
Modern classification systems are based on structural similarities, fossil record and
- modern classification is based on figuring out evolutionary relationships using evidence from living species, the fossil record, and molecular data. - the evolutionary history for a group of species. ... - each species in a clade has some traits that have changed from its ancestors over evolutionary time.
Hope This Helps! can i get brainliest lol
In eukaryotic cells, where does transcription occur?
A. Nucleus
B. Extracellular matrix
C. Cytoplasm
There are 42 gallons in one barrel of oil. How many barrels of oil are equivalent to 2,572.5 gallons of oil?
Answer:
The 62.25 barrels of oil are equivalent to 2562.5 gallons of oil
Explanation:
Given that :-
There are 42 gallons in one barrel of oil.
To find :-
How many barrels of oil are equivalent to 2,572.5 gallons of oil?
Solution :-
If 42 gallons oils in one barrel of oil
so, barrels of oil are equivalent to 2562.5 gallons of oil = 257.5/ no. of gallons in one barrel
= 257.5 / 42
barrels of oil equivalent to 2562.5 gallons of oil = 61.25Hence, 62.25 barrels of oil are equivalent to 2562.5 gallons of oil
En este dominio existen gran variedad de procariotas, con diversidad morfológica y fisiológicas, en este están todas
las procariotas patógenas, su tamaño oscila entre 1 y 40 milimicras, es
a) Protista
b) Eubacteria
c) Archaea
d) Eukaria
Answer:
c) Archaea
Explanation:
Los dominios biológicos son los taxones de más alto nivel, por encima de los reinos y abarcando todos los taxones, caracterizándolos de la manera más generalizada posible, dentro de la clasificación científica. Hay tres tipos de dominios llamados Archaea, Bacteria y Eukarya. Entre ellos, el dominio conocido como Archaea es el que engloba a los organismos procarióticos, unicelulares y patógenos, es decir, capaces de provocar enfermedades en el ser humano.
Which of the following materials do cone bearing plants produce for reproduction?
O spores and pollen
O flowers
O egg and sperm cells
O anther and stigma
Long
Answer:spores and pollen
Explanation:
All life shares the same evolutionary heritage from an ancestor that appeared 3.8 billion years ago.
A. True
B. False
Answer:
A. True
Explanation:
The last universal common ancestor or last universal cellular ancestor (LUCA), also called the last universal ancestor (LUA), is the most recent population of organisms from which all organisms now living on Earth have a common descent—the most recent common ancestor of all current life on Earth.
Answer:
A. True
Explanation:
Yes, all life shares the same evolutionary heritage from an ancestor that appeared 3.8 billion years ago.
help me ..................
Answer:
1,1,6
Explanation:
saw ur other post w the actual Q; ans 1, 1 and 6.
Answer:
Explanation:
The first two pictures show an ovum and a sperm so it is 1 for both boxes. The third picture shows embedding into the uterus wall and that is 6.
I was wondering what is this until you posted the questions in another post.
Our understanding of taxonomy has changed and will continue to change as we further understand living things at the genetic level.
A. True
B. False
Answer:
a
Explanation:
what law out of newtons law is this statement ? please help
( The phone will hit the ground and the ground will push up with the same force. With a case, it is increasing the amount of time the phone hits the ground. This means the reaction force will be less.)
Answer:
Newton's Third Law
Explanation:
Newton's Third Law is: If object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
In this case, Object A is the Phone, and Object B is the ground. When the phone(Object A) hits the ground(Object B), the ground pushes up on the phone making the time increase and makes the reaction force less. Hope this helps!
List three sources of freshwater.
Rain, River, ocean
Answer:
Sources of freshwater: rivers, lakes, reservoirs, and creeks and streams.
Water and nutrients that are not cycled are stored in a
Answer:
Reservoir
................
Which layer of the atmosphere protects all life on land by absorbing high energy radiation?
Answer:
The troposphere layer.
5. Our nervous system and our skeletomuscular system help us react to stimuli. Give one example on how this helps us maintain homeostasis.
Answer
The nervous and skeletomuscular systems help maintain homostasis by regulating respiration.
Explanation:
The brain stem, consisting of the pons and medulla, represent the main respiratory center. According to Wikipedia, "an increased level of carbon dioxide in the blood, or a decreased level of oxygen, will result in a deeper breathing pattern and increased respiratory rate to bring the blood gases back to equilibrium."
This is an example of a homostastic response controlled by both of the organ systems referenced above.
Source: https://en.wikipedia.org/wiki/Homeostasis
.............................que es la salud?
Which of the following can cause mutations?
A. All of the above
B. Radiation
C. Chemicals
D. Errors during DNA Replication
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just correct me if I'm wrong ✨
Don't bash me please :(
__________________________________
D. Errors During DNA Replication ✨
[tex]\color{Violet}\rm{☘︎Hopeithelps!}[/tex]
Mutations arise spontaneously at low frequency owing to the chemical instability of purine and pyrimidine bases and to errors during DNA replication. Natural exposure of an organism to certain environmental factors, such as ultraviolet light and chemical carcinogens (e.g., aflatoxin B1), also can cause mutations.[tex]\color{gold}{✨•MissyyZackiee•✨} [/tex]__________________________________
“I ask that you’ll have the power to grasp love’s width and length, height and depth, together with all believers. I ask that you’ll know the love of Christ that is beyond knowledge so that you will be filled entirely with the fullness of God.” — Ephesians 3:18-19 ❤__________________________________
Describe how organ systems interact to get oxygen to the cells
The body's cells are supplied with oxygen and nutrients through the heart, blood, and blood vessels. Blood transports carbon dioxide to the lungs (for exhale) and picks up oxygen through the network of arteries, veins, and capillaries.
What is oxygen in the body?Our bodies require a specific amount of oxygen to function effectively since oxygen is necessary for life. When you breathe (inhale), oxygen enters your body through your mouth or nose and travels through your lungs into your bloodstream.
Oxygen inhaled by the lungs is also carried by your blood. Your body's other cells receive oxygen and nutrition from your circulatory system, which then collects any waste products they produce, including carbon dioxide, and transports them to your kidneys and lungs for elimination.
Therefore, the blood collects food nutrients from the small intestine and transports them to every cell in the body.
To learn more about oxygen in the body, refer to the link:
https://brainly.com/question/14236085
#SPJ6
What type of information is recorded in a trace fossil?
A: Radioactive evidence
B: molecular evidence
C: evidence of a fossil’s actual age
D: evidence of an organism’s activities
Evidence of an organism's activities is the type of information that is recorded in a trace fossil.
HELP PLEASE DUE SOON
Explain how building the lake near Galetown could affect the amount of water vapor and the amount of rain.
Answer:
Adding a lake near any town will most likely increase rainfall because of the added water, and water vapor levels will also increase. Because of the excess water in the environment, more water will be found in the surrounding atmosphere (the same reason precipitation will increase in the area.)
What are the base units the SI units are based on
Answer:
he units in the revised SI are based completely on seven unchanging quantities or “universal constants,” including the speed of light, the amount of electric charge in an electron, and the Planck constant.
hope it helps
Meiosis results in ____ cells.
Answer:
haploid
Explanation:
Which cell organelles are made of microtubules, are always found
in pairs, and are important in forming the spindle apparatus and cleavage furrow during the division in animal
cells?
Answer:
some cell made from s****x. baby from
Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope. Centrioles play a role in organizing microtubules that serve as the cell's skeletal system. They help determine the locations of the nucleus and other organelles within the cell.