Answer:
Algae produced and still produces much of the world's oxygen supply, especially in the atmosphere.
Please give brainliest.
Explanation:
Answer: Billions of years ago, algae changed the Earth's atmosphere by producing oxygen, which made way for the evolution of organisms.
Hope this helped :D
what is half-life of mercury-203
Answer:
The correct answer is - 47 days approximately.
Explanation:
In this given graph is the decay graph of mercury-203, there is a representation of the relation of change in the amount of the mercury -203 with the time in days. The red arch is showing the change of parent isotope percent with elapsed time and the green dashed arch showing the daughter isotope percentage with isotope.
The half-life is the required time to decay an element to half of its inital amount, according to the definition the half-life of parent isotope mercury-203 is the amount where the red arch is present at 50% in the graph that is 47 days approximately.
A frog that is native to the rainforests of Central America is a member of the genus agalychnis. This genus is part of the hylidae family, and this specific frog belongs to the species callidryas.
What is the scientific name for this frog?
2 Why does Sean Brady feel optimistic about the discovery of this new antibiotic?
(A) because it has already been approved to treat illnesses in humans
(B) because it helped him launch his company, Lodo Therapeutics
(C) because it proved that lab studies are not necessary to develop new antibiotics
(D) because it suggests that more antibiotics are waiting to be discovered
Article : Scientists are studying new ways of finding antibiotics — in dirt
Answer:
D. Because it suggests that more antibiotics are waiting to be discovered
Mitosis
A) The process of a cell becoming specialized to have a particular function or purpose
B) The production of two daughter cells from a single progenitor cell
C)The phase of the eukaryotic cell cycle in which a single cell divides into two cells
D)Two identical copies of chromatids produced by one chromosome
E)A protein structure that separates the genetic material in a cell
Answer:
B
Explanation:
What transitions occurs when an ice cube shrinks
Answer:
it changes from solid water to liquid water.
Explanation:
what are examples of cyber bullying
Answer:
picking on people online
trolling
and exposing personal info online that is not yours to share
Explanation:
if all cells in an organism have the same DNA, the same genes why are there so many different types of cells in the human body for example there are nerve cells and skin cells and muscle cells
Answer:
The cell (from Latin cella, meaning "small room"[1]) is the basic structural, functional, and biological unit of all known organisms. Cells are the smallest units of life, and hence are often referred to as the "building blocks of life". The study of cells is called cell biology, cellular biology, or cytology.Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids.[2] Most plant and animal cells are only visible under a light microscope, with dimensions between 1 and 100 micrometres.[3] Electron microscopy gives a much higher resolution showing greatly detailed cell structure. Organisms can be classified as unicellular (consisting of a single cell such as bacteria) or multicellular (including plants and animals).[4] Most unicellular organisms are classed as microorganisms.
The number of cells in plants and animals varies from species to species; it has been estimated that humans contain somewhere around 40 trillion (4×1013) cells.[a][5] The human brain accounts for around 80 billion of these cells.[6]
Cells were discovered by Robert Hooke in 1665, who named them for their resemblance to cells inhabited by Christian monks in a monastery.[7][8] Cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that cells are the fundamental unit of structure and function in all living organisms, and that all cells come from pre-existing cells.[9] Cells emerged on Earth at least 3.5 billion years ago.[10][11][12]
United States has historically imported much more oil than it produces. Recently,
however, there has been a movement to further increase local oil drilling. Which
of the following would be a negative effect of increased drilling for oil?
O A. Increased population near drilling sites will cause an increase in the
national crime rate.
O B. Increased drilling may lower the cost of oil-based products and fuels.
OC. An increase in oil drilling would increase the risk of pollution.
Answer:an increase in oil drilling would increase the risk of pollution.
Explanation:
took the test 100 on it ♂️
Differentiate between:
Species diversity and ecosystem diversity
Answer:
Eplanation :spices diversity is the number or variety of species in the world or in a particular region. Ecosystem diversity is the number or variety of ecosystems within a particular area.
Answer:
Species diversity refers to the number of different species that are represented in a given community while ecosystem diversity refers to the variety of different ecosystems within an area.
how would you check that the destarching had been effective
Answer:
Test a leaf or two for the presence of starch in order to determine whether the plant is completely destarched. If a positive result is obtained - leaves turn blue-black, the plant should be left under in the cupboard or under the coverd bell jar for longer, until a negative result- no colour change - is obtained.
B. How does its genotype and phenotype
differ from the non-circled offspring?
Someone answer me please
Answer:
Due to mutation.
Explanation:
The genotype and phenotype of circled offspring is different from the non-circled offspring because it has different genetic makeup, that is responsible for its different color. The change in the circled offspring's genotype was caused by a mutation. Mutation is a change that occurs in the DNA sequence, or genetic makeup of an organism due to mistakes when the DNA is copied or environmental factors such as UV light and smoke etc.
This food chain shows the interactions between organisms found in a pond ecosystem.
Algae -Water Boatman - Diving Beetle - Frog - Heron
Which organism would be affected first if algae was removed from the ecosystem?
diving beetle
frog
heron
water boatman
The first element of the periodic table is:
(A) Oxygen
(B) Hydrogen
(C) Helium
(D) Carbon
Answer:
The anwser Is B:Hydrogen
Answer:
B) Hydrogen
Explanation:
hydrogen's atomic number is 1
______ is also common at both divergent and convergent plate
boundaries
Looking at it we need the words that you can have but if it the place it commonly occurs at, I think it would be mid-oceanic ranges.
The current world population is approximately seven billion people. Every person consumes resources in order to live. As the population continues to grow, how will this growth affect resources?
Answer:
there will be to much trash from all the people eating and not recycling plastic and our earth will turn into a dump.
Explanation:
What produces toxic chemicals in the body?
Explanation:
Chemicals can be toxic because they can harm us when they enter or contact the body. Exposure to a toxic substance such as gasoline can affect your health. Since drinking gasoline can cause burns, vomiting, diarrhea and, in very large amounts, drowsiness or death, it is toxic.One more biology multiple choice.
Answer:
A. Acocelomate
ex: Tapeworms(they dont have a digestive tract)
Explanation:
Which is not a function of the excretory system
A. Removing wastes
B. Maintaining homeostasis
C. Digestion
D. Exchange of gasses
Answer:
D. exchange of gasses
hope it helps
UNIT TEST!! Help!! :C
1. Which statements describe gene therapy? Check all that apply.
☐ It cures all cases of cystic fibrosis.
☐ It involves the modification of DNA.
☐ It is easy to apply to all cells affected by the disorder.
☐ It attempts to replace a mutated gene with normal DNA.
☐ It does not always cure patients who use it.
2. A fruit fly has black eyes. Having red eyes is a dominant trait (R) and having black eyes is a recessive trait (r).
Which describes the fruit fly’s genotype and phenotype?
A.)genotype: black eyes
phenotype: Rr
B.)genotype: black eyes
phenotype: rr
C.)genotype: rr
phenotype: black eyes
D.)genotype: Rr
phenotype: black eyes
Thank you sm for helping <33
Answer:
for number one i got ☐ It involves the modification of DNA
☐ It attempts to replace a mutated gene with normal DNA.
☐ It does not always cure patients who use it.
FOR NUMBER TWO I GOT:
D.)genotype: Rr
phenotype: black eyes
plz mark brainliest!!!
Answer:
☐ It cures all cases of cystic fibrosis.
☐ It involves the modification of DNA. √
☐ It is easy to apply to all cells affected by the disorder.
☐ It attempts to replace a mutated gene with normal DNA. √
☐ It does not always cure patients who use it. √
Explanation:
Can y’all answer quick and correctly I’m ina bad mood rn
Answer: capillaries
Explanation:
Answer:
Capillaries
Explanation: Fluid is forced out of capillaries (filtration) by blood pressure (hydrostatic pressure). As plasma is filtered, globular proteins are concentrated in the blood passing through the glomerulus, as globular proteins are too large to be filtered.
Summarize: How are the processes of natural selection and artificial selection similar? How are they
different?
i really need help with this.
PLEASE ANSWERR ASAP I WILL GIVE BRAINLYEST AND REPORT (science) I KNOW 1, 2 AND 5 I NEED 3 4 AND 6
Can someone please help!! Will mark brainlist!!!
Answer:
All answers are in the image
mitosis is the stage of the cell cycle during which
Answer:
mitotic phase
Human eggs mature one by one after puberty True or False
Using Figure 10-4 above, list the correct order for the diagrams.
A. CDAB
B. DCAB
C. DACB
D. CDA
If the average high temperature in GR is 30 degrees in January and the average temperature in Miami is 74 degrees, what is the difference between high temperatures?
Answer:the equator
Explanation:
15 POINTS TOHELP HELP HELP PEOPLE PLEASE NO LINKS AND FILL IN THE BOXES BELOW THAT ARE NOT FILLED IN YET I CANT FIGURE THESE 2 OUT!
Answer: earths climate it will affect the system by destroying animals habitat cause air pollution and eventually there will be plastic and trash in the rainforest that wasn't there before
this is a negative effect because building a road will hurt the local ecosystem by putting humans in contact with wildlife and can/will cause a disease transfer in the wildlife's population or the human population.
logging companies it will severely damage the rainforest and its wildlife there causing irreversible damage to the ecosystem
tis is a negative effect because deforestation in the largest forest in the world is not good for the environment carbon dioxide will begin to build up and oxygen levels will start to decline.
If you were describing the weather to someone what kinds of things would you talk about?
please no link answers put this in your own word please I will reward you. brainliest! 5 stars! heart! comment! follow u!
Answer:
rainy, wet, humid, dry, arid, frigid, foggy, windy, stormy, breezy, windless, calm
Explanation: