If a rock was determined to be around 3.9 billion years old how much Potassium 40 would be left in that rock sample? (Percentage of Potassium 40)
What percent of potassium-40 remains undecayed in a rock that is 3.9 billion years old? The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.
What is this plant tissue?
Answer:
microchondrian i think
Explanation:
An animal that does not have the traits to adapt to its surroundings will?
Explanation: If organisms cannot adapt to the changes in their ecosystem, they may move to another location. If they will not move, the species may become threatened, endangered, or extinct. Under an evolutionary phenomenon called relaxed selection, traits that were advantageous in one time and place become obsolete in another. Traits that aren't actively maintained by natural selection tend to become smaller or less functional over time, studies suggest.
hiiiiiiiii people!!!!!!!!!!!!!!
Answer:
hiiiiiiiiìiiiiiiiiiiiiiii
Answer:
um hi
Explanation:
hey could someone help me with this immediately pls!!! i’ll mark brainiest if u don’t leave a link or guess!!!
Answer:
C
Explanation:
it literally says that the lions used to look different, thus proving the evolution theory
I dont understand what they are asking please help!!
Answer:
"Phenotype" would mean the two letter combination of traits that make up this trait. For example, heterozygous would be something like "Cc", with the "C" representing a dominant trait and "b" representing a recessive trait.
In this case, the answer would look something like "CC", though I'm not sure the exact letters this question is using. Good luck!
In a biological reaction involving an enzyme, what does the substrate bind to? the active site of another substrate the inactive site of an enzyme the inactive site of another substrate the active site of an enzyme
Answer: The part of the enzyme where the substrate binds is called the active site (since that's where the catalytic “action” happens). ... Thanks to these amino acids, an enzyme's active site is uniquely suited to bind to a particular target—the enzyme's substrate or substrates—and help them undergo a chemical reaction. To catalyze a reaction, an enzyme will grab on (bind) to one or more reactant molecules. These molecules are the enzyme's substrates. In some reactions, one substrate is broken down into multiple products. ... The products then leave the active site of the enzyme.
Explanation:
Answer:
the active site of an enzyme
Explanation:I did it on a testtt
In your words, give a brief overview of the process of photosynthesis. Include where each phase takes place within a plant cell.
Can someone plz help me on this plz that would be lovely
Answer:
C
Explanation:
I took that and i put C and i got it correct trust me
Which best describes RNA?
Single-stranded & contains uracil and ribose
Single-stranded & contains thymine and ribose
Double-stranded & contains uracil and ribose
Single-stranded & contains thymine and deoxyribose
Explain how the biogeochemical cycles obey the law of conservation of matter. Use 1 cycle as specific evidence to support your claim.
Answer:
i
Explanation:
iiiiiiiiiiiiiiiiiiiiiiiii
How can an impulse be stopped?
Answer:
The impulse is stopped dead if an action potential cannot be generated.
Explanation:
The neurotransmitter binds with receptors on the other neuron. -If the K+ channels open, the neuron membrane becomes hyperpolarized, and inhibition occurs. The impulse is stopped dead if an action potential cannot be generated.
what part do wildifres play in the life cycle of a forest?
Answer:
Help new plants sprout :)
Explanation:
Forest fires burn away leaf and dead plant litter. It can also burn away invasive species or any diseased plants. Then, nutrients are returned to the soil which helps new plants sprout and thrive. Hope this helped !!
Choose the two most important reasons for the different seasons on Earth.
Answer:
the distance between sun and earth and earth position.
Explanation:
Need help please. Which statement describes the Chesapeake Bay?
*One of Virginia's major rivers flows into the Chesapeake Bay.
*The portion of the bay located in Virginia is on its east coast.
*Chesapeake Bay is one of the largest watersheds in Virginia.
*Less than half of Virginia's water drains into the Chesapeake Bay.
Answer: C I'd say
Explanation: The Chesapeake Bay is the largest estuary in the United States. The Bay is located in the Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula with its mouth of the Bay at the south end located between Cape Henry and Cape Charles. So tldr: C
Which of the following is NOT an effect of habitat fragmentation?
Organisms have decreased ability to move around.
Organisms have decreased food sources.
Organisms have greater chances to find a mate.
Organisms have fewer opportunities to hunt for food.
You are part of a small group of humans rocketed at “warp speed” to Planet X, without any books, weapons, or technology. Planet X has no ozone layer to protect its surface from cancer-causing ultraviolet radiation, but native plants and animals have evolved to live safely there. Below the surface, the planet has a network of underground tunnels, just a meter high, which are inhabited by carnivorous predators.
Write 3 paragraphs using the vocabulary words we discussed today in class about how descendants of the group of humans would look and act after evolving for 100,000 years on Planet X.
Use these vocabulary words:
• Evolution
• Mutation
• Non-random Mating
• Gene Flow
• Genetic Drift
Answer:
Explanation:
How do you're muscles & skeleton work together?
The bones of the skeletal system serve to protect the body's organs, support the weight of the body, and give the body shape. The muscles of the muscular system attach to these bones, pulling on them to allow for movement of the body.
invertebrates are best described as:
Answer:
it's the third option
Explanation:
they are multicellular Heterotrphs and don't have a backbone
Answer:
An invertebrate is an animal without a backbone. In fact, invertebrates don’t have any any bones at all! Invertebrates that you may be familiar with include spiders, worms, snails, lobsters, crabs and insects like butterflies. However, humans and other animals with backbones are vertebrates.
Explanation:
what is the cobra effect
Suppose you coated the leaves of a plant with petroleum jelly. How would the plant's rate of transpiration be affected?
Select the correct answer.
How much solar radiation is reflected back by clouds?
Ο Α.
5 percent
OB.
10 percent
OC.
19 percent
OD
30 percent
Answer:
D. 30%
Explanation:
what population distribution pattern works best when doing random sampling? why.
a. clump
b. random
c. uniform
Answer: Individuals of a population can be distributed in one of three basic patterns: uniform, random, or clumped.
Explanation:
because a bacterium can only reach the cellular level
Answer:
Bacteria are much larger than viruses, and they are too large to be taken up by receptor-mediated endocytosis. Instead, they enter host cells through phagocytosis. Phagocytosis of bacteria is a normal function of macrophages.
Which kingdom does Paramecium belong to?
Answer: Chromista brainliest??
Explanation:
Pls help me. And thank you so so much!
Answer:
A
Explanation:
got this
How much do moon jelly fishes eat?
Answer:
https://aquaticcreationsgroup.com/jellyfish/moon-jellyfish-info/#:~:text=One%20of%20the%20most%20common,once%20a%20day%2C%20every%20day.
Explanation:
HOPE THIS HELPS LUV :3
Genetically identical plants will produce either pink flowers or blue flowers, depending on the type of soil in which they are planted. What is most likely the explanation for the differences in flower color?
Answer:
.the flowere color gene is co dominate
What are the four types of receptors? What kind of stimulus does each one respond to?
Explanation:
Broadly, sensory receptors respond to one of four primary stimuli:
• Chemicals (chemoreceptors)
• Temperature (thermoreceptors)
• Pressure (mechanoreceptors)
• Light (photoreceptors)
During the retreat of a glacier, pebbles and bare rock that were under the sheet are exposed to the air. What is likely the next event to occur?
( don’t mind the blue dot )
The retreat of a glacier, pebbles and bare rock that were under the sheet are exposed to the air. Thus, option D is correct.
Why, explain brefly?it’s cause About 200 years ago, the glaciers started melting, which scientists call "glacial retreat."
With the retreat of the glaciers, ridges of rock and debris called moraines remained.
Moraine is little more than bare rock and no plant life can exist on it until the first stages of succession begin.
Thus, option D is correct.
To learn more about "glacial retreat." click here:
https://brainly.com/question/14279654
#SPJ2