Answer:
The cell membrane only alows certian materials to move through the membrane. Just like a security guard the membrane sorts through the good stuff and lets it past, but if someone or something bad comes along the security guard stops it. Just like the cell membrane.
What backs up a scientific law?
Answer:
Scientific laws are similar to mathematical postulates. They don't really need any complex external proofs; they are accepted at face value based upon the fact that they have always been observed to be true. Specifically, scientific laws must be simple, true, universal, and absolute.
Explanation:
A researcher, studying dolphins in the wild, made the following sketch. Each dot on the map represents one dolphin. The area surveyed by the scientist was 1 km2. Based on the researcher’s data, how many dolphins would you estimate to be in a 3 km2 area?
A. 3
B. 7
C. 14
D. 21
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The eggs of a cone bearing plant:
receive sperm through the development of tubes
are held on the sticky fluid of the female cone
receive pollen from the wind
Answer:
Receive pollen from the wind.
Explanation:
The sperm of the male cone floats through the air and lands on the scale of the female cone. Sperm cells move through the pollen tube of the female cone and one of them fertilized an egg cell which eventually turns into a seed.
Answer:
The eggs of a cone bearing plant receive sperm through the development of tubes.
Explanation:
Cone-bearing plants have two types of cones: female cones and male cones. Reproduction begins when one of the pollen grains from inside a pollen sac on the male cone floats through the air to the scale of a female cone. A pollen tube then grows from the pollen grain toward the female ovule. Sperm cells move through the pollen tube and one of them fertilizes an egg cell, which then develops into a seed. The winged seed floats to the ground and begins to germinate. As the top of the seedling reaches for light, the hypocotyl straightens and the cotyledons spread out.
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Which two of the following correctly describe what a gene is?
A packet of genetic information that can be passed down from one generation to the next
A DNA molecule
The entire collection of genetic information in a given species
A section of DNA that provides instructions for building a specific protein
I'm not sure
Answer:
A section of DNA that provides instructions for building a specific protein and A packet of genetic information that can be passed down from one generation to the next
Explanation:
A DNA molecule is not a gene, it is a nucleotide. The entire collection of genetic information in a given species results isn't a gene although many genes comprise what is the genome. Given that those two answers are not what genes are, the other two options are correct.
Read each research question below. Identify the IV, DV, and CV of each experiment.
What amount of sunlight makes pea plants grow tallest?
IV:
DV:
CV:
Which type of soda has more sugar: Brand X, Brand Y, or Brand Z?
IV:
DV:
CV:
Is the height of a ball’s bounce affected by the height from which the ball is dropped?
IV:
DV:
CV:
Which battery will last the longest: Superlast or Energy Star?
IV:
DV:
CV:
5. Is the water temperature of Lake Michigan affected by the depth of water?
IV:
DV:
CV:
The factors that are kept the same in an experiment. ________
The is also known as the responding variable. ________
This is the one thing that is changed by the experimenter. _______
This is also called the manipulated v
Answer:
This question has many subsections, the answers to the questions are below
Explanation:
Independent variable (IV) is the variable that is changed or manipulated by the experimenter while the dependent variable (DV) is the variable that is being measured in an experiment. The control variable (CV) is the variable that is kept constant throughout the experiment. The DV, IV, and CV for the following experiment are:
Independent variable (IV) is the variable that is changed or manipulated by the experimenter while the dependent variable (DV) is the variable that is being measured in an experiment. The control variable (CV) is the variable that is kept constant throughout the experiment. The DV, IV, and CV for the following experiment are:
1. What amount of sunlight makes pea plants grow tallest?
IV: Amount of sunlight
DV: Height of pea plant
CV: Same pea plant, Water
2. Which type of soda has more sugar: Brand X, Brand Y, or Brand Z?
IV: Type of Soda
DV: Sugar content
CV: Same volume of soda
3. Is the height of a ball’s bounce affected by the height from which the ball is dropped?
IV: Height from which ball is dropped
DV: Height of ball's bounce
CV: Same weight of ball, same size of ball
4. Which battery will last the longest: Superlast or Energy Star?
IV: Type of battery
DV: longevity of battery
CV: Same usage period
5. Is the water temperature of Lake Michigan affected by the depth of water?
IV: Depth of water
DV: Water temperature
CV: Same lake
The factors that are kept the same in an experiment is the CONTROL VARIABLE
The is also known as the responding variable- DEPENDENT VARIABLE
This is the one thing that is changed by the experimenter- INDEPENDENT VARIABLE
This is also called the manipulated variable- INDEPENDENT VARIABLE
Which shows that the results of an experiment are reliable?
A. The experiment creates ideas for new experiments.
B. The experiment can be repeated with the same results.
C. The experiment uses a very simple procedure.
D. The experiment supports the hypothesis.
Which of the following is an INVERTEBRATE?
A) Butterfly
B) Wasp
C) Crab
D) Frog
Answer:
All of the following are invertebrates except for the frog
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Explanation:
all insects are invertebrates
including the crab
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Which type of RNA is shown in orange, carrying an amino acid?
A. Messenger RNA
B. Transfer RNA
C. Ribosomal RNA
Answer: B. Transfer RNA
Explanation:
What’s the differences between commercial sponges, bath sponges, and sponges in their natural environment.
Answer:
Synthetic sponges vs natural sponge
Explanation:
Sea sponges inhibit bacteria, mold and mildew; Sea Sponges are permeated with natural enzymes that inhibit the growth of mold, mildew and bacteria. ... Most synthetic sponges fall apart, shrink and become infested with bacteria and mildew in less than one week.
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Explain the importance
of decomposers to the overall
biogeochemical cycle.
Answer: Decomposers plan an important role in the biogeochemical cycling for nutrients in the environment as they are responsible for the breakdown and return of nutrients back to the environment in their native state.
Decomposers are essential for the biogeochemical cycle as they facilitate the recycling of nutrients, provide energy for other organisms, and help maintain the health and balance of ecosystems by Breaking down organic matter, Recycling nutrients, Energy flow and Detoxification.
Without decomposers, organic matter would accumulate, nutrients would become locked up, and energy flow within ecosystems would be disrupted.
Decomposers play a crucial role in the overall biogeochemical cycle. Here's why they are important:
Breaking down organic matter: Decomposers, such as bacteria and fungi, break down dead plants, animals, and other organic materials into simpler compounds. They do this through the process of decomposition, where they release enzymes that break down complex molecules into smaller, more manageable forms.
Recycling nutrients: By decomposing organic matter, decomposers release essential nutrients back into the ecosystem. These nutrients, such as carbon, nitrogen, phosphorus, and sulfur, are then made available for uptake by plants and other organisms. This recycling of nutrients is vital for maintaining the balance and productivity of ecosystems.
Energy flow: Decomposers also play a crucial role in energy flow within ecosystems. When they break down organic matter, they release energy in the form of heat. This energy can then be used by other organisms in the ecosystem, such as primary consumers (herbivores) and secondary consumers (carnivores), to carry out their life processes.
Detoxification: Decomposers are capable of breaking down and detoxifying harmful substances and pollutants in the environment. For example, certain bacteria can break down pesticides and other chemical pollutants, helping to reduce their negative impact on the ecosystem.
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Golden-cheeked warblers are an endangered species of bird that nest only in central Texas. They build their nests using bark from ash juniper trees and feed on spiders and insects. Brown-headed cowbirds sometimes lay eggs in warblers' nests, killing the warblers eggs. Blue jays are known predators of the golden-cheeked warblers' offspring. The survival of golden-cheeked warblers would be most threatened by an increase in the —
Answer:
C. clearing of ash juniper trees for farmland
Explanation:
Golden-cheeked warblers will be in more danger if "clearing of ash juniper trees for farmland" will increase because juniper trees provide barks to build the nest for Golden-cheeked warblers, if Golden-cheeked warblers will not get enough barks to build the nest, they will not able to reproduce and their population will decrease further.
Hence, the correct answer is "C".
an elements has two or more atoms with the same number of protons but different
number of neutrons it is called a(n)
isotope
neutron
electron
none of the above
Answer isotope
Explanation: it has more than one atom
what would happen if all countries in the world depended only on wind power?
Answer:
A country getting all its electricity from a combination of wind, solar ... Not only does that make vitamin D a commodity, it also means solar ... Elon Musk became a sensation in South Australia last year after he decided Tesla would build the world's biggest lithium-ion battery ... This didn't happen overnight.
What is the identity of the planets?
Answer:
A is Jupiter, B is Neptune, C is Saturn, D is Uranus
Explanation:
Explain how the structure of saturated fats poses a danger to your health.
Answer:
Saturated fats are long chains of rigid fats.
Explanation:
Saturated fats will raise the cholesterol levels of an individual. Their structure results in deposits of fatty acids within arteries and vastly increases the risk of heart-related disease.
Hope this helps
How many membrane layers cover the nucleus?
Answer:
2 membrane layers cover up the nucleus
Answer:
two lipid bilayer
Explanation:
the nucleus membrane is made up of two lipid bilayer
5. What bone does not join with any other bone and is part of the axial skeleton?
Answer:
Hyoid bone
Explanation:
Although it is not found in the skull, the hyoid bone is considered a component of the axial skeleton. The hyoid bone lies below the mandible in the front of the neck.
Answer:
The hyoid Bone
Explanation:
Although it is not found in the skull, the hyoid bone is considered a component of the axial skeleton.
Suppose we completely stopped burning fossil fuels immediately. How many years would it take to return to atmospheric CO2 levels from the year 1800, about 600 GtC? Use the Gizmo to find the answer.
Answer:
Explanation:
It would take 50 years to return to atmospheric CO2 levels from the year 1800. I know this because I set the fossil fuel usage to 0 and proceeded to simulate 50 years and that’s when the atmospheric CO2 levels returned to 600 GtC.
As per observation It could take 50 years to go back to atmospheric CO2 degrees from the yr 1800.
Each year, there has been no extrade in the quantity of CO2 withinside the ecosystem because of soil and land plants. coal also can be the answer.
What is co2 quantity ?Since 2000, the worldwide atmospheric carbon dioxide quantity has grown with the aid of using 43.5ppm, an growth of 12 percent. The contemporary-day document of atmospheric carbon dioxide degrees commenced with observations recorded at Mauna Loa Observatory in Hawaii.
Thus it is well explained.
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What happens when energy is released from ATP?
1, ATP adds a phosphate
2, ATP completely breaks apart
3, ATP loses all three of its phosphates
4, ATP loses the 3rd phosphate
What would be the main problem with reproduction if meiosis did not take place to form sex cells?
A.The zygote would have two nuclei.
B.Fertilization would result in a zygote with half as many chromosomes as the parents.
C.Fertilization would result in a zygote with twice as many chromosomes as the parents.
D.The zygote would have no nucleus.
Answer:
c.
Explanation:
Answer:
C. Fertilization would result in a zygote with twice as many chromosomes as the parents.
Explanation:
The chemical reaction equation of photosyntesis is shown here:
6CO2 + 6H2O → C6H12O6
What information is not given in this equation.
A)It does not show if the reaction is reversible or not reversible.
B)It does not show the reactants needed for the reaction.
C)It does not show that photosynthesis consists of many separate steps.
D)It does not show the number of molecules required to produce glucose.
Answer:
C
Explanation:
C appears to be the best answer but I think a better answer would be that it didn't include another product which is oxygen. So unless it is late and my brain is not function, I would say that should be the answer. But otherwise, since it is not there, C is the best one I think.
The chemical reaction equation of photosynthesis is shown here:
6CO2 + 6H2O → C6H12O6, C)It does not show that photosynthesis consists of many separate steps. Thus option "C" is correct.
What is photosynthesis?
The chemical reaction of photosynthesis is given as follows;
6CO₂(g) + 6H₂O(l) + Energy from light → C₆H₁₂O₆(s) + 6O₂(g)
Therefore, six molecules of gaseous carbon dioxide (CO₂) combine with six molecules of liquid water (H₂O) in the presence of energy from Sunlight to produce one molecule of solid glucose (C₆H₁₂O₆) and six molecules of gaseous oxygen (O₂)
The 6O₂ is the gaseous oxygen produced as a byproduct of photosynthesis
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Water is always _________________ around the earth.
Answer:
Floating
Explanation:
Complete the statement to describe the sodium-potassium pump.
The sodium-potassium pump moves____
ions into the cell and____
ions out of the cell.
Answer:
The sodium-potassium pump moves potassium
ions into the cell and sodium
ions out of the cell.
Explanation:
Answer:
The sodium-potassium pump moves potassium
ions into the cell and sodium
ions out of the cell.
Explanation:
i got it right on edge
To access the Hyperlink icon, you will need to navigate to the _____ tab.
Answer:
Insert tab
Explanation:
Answer:
The insert Tab
Explanation:
One function of proteins is to provide structural support.
True or False
Answer:
true....................
Explanation:
:)
Which organism develops breathing organs from pharyngeal arches?
A.
shark
B.
spider
C.
sea star
D.
sea horse
thank you!! :))
Answer:
a ) shark
____________
BRAINLIEST PLS HELP! Balance this equation and be sure to show your work. NaCl + H2O —→ Cl2 + NaOH + H2
Answer:
2NaCl + 2H2O —→ Cl2 + 2NaOH + H2
Work:
NaCl + H2O —→ Cl2 + NaOH + H2
Na-1 Na-1
Cl-1 Cl-2
H-2 H-1+2
O-1 O-1
2NaCl + 2H2O —→ Cl2 + 2NaOH + H2
Na-2 Na-2
Cl-2 Cl-2
H-4 H-2+2
O-2 O-2
How many genes make up the human genome?
four: adenine, thymine, guanine, and cytosine
23 pairs of genes
20,000–25,000 genes
3 billion genes
Answer:
The correct answer is - 20000, 25,000 genes.
Explanation:
Genes are made by the functional and physical unit of the heredity called DNA. Genes are the precursors or encoded instructions to make a specific protein. Genes can be small or large depending on the DNA bases present in it which can be hundreds to millions in numbers.
According to the Human Genome Project, which found out the total genes present in a human genome between 20000 to 250000 genes approximately.
Thus, the correct answer is - 20000, 25,000 genes.
Genes are the hereditary units, which are present in the coded segments of the DNA. Genes carry the information from parent to daughter cells.
There are 20,000 to 25,000 genes that make up the human genome.
Human Genome Project was conducted for several years, the result obtained was:
The human genome project was an international scientific project, which aimed at determining the base pairs that make up the human DNA.The project estimated that humans consist of 20,000 to 25,000 genes in their genome. Each individual inherits the copies of genes from both parents.Therefore, the correct answer is Option C.
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The chart shows the number of blue crabs, a commonly-eaten seafood, in a population sample in South Carolina. Using the phrase "in tow" means that this shows the number of crabs caught in nets per year. The information in the chart suggests that blue crabs are likely A) becoming extinct. B) being overfished. C) now in abundance after years of struggling. D) decreasing in number, but increasing in size.
Answer:
Your answer is: B) being overfished
Explanation:
Hope this helps you
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Why does evolutionary theory absolutely require the earth to be very
old?
Answer:
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Explanation:
rrmgtgkwggtugiwelwrogir;wre3irppwufooe4turjeowyeorut94w3ur3r93rutio22ofidjfdfdlau44eogrifkg5gyreu5uwqgkoqasswxsaslbkfbslsnnsvofs noivfvbofb fdvnvvwiwrgrkbfs lb lxngjdckdrjgkakofbnbbtruufvnfbkf,fbhtrvfhvfknbtvjvjlv.vnvsvjivfdivfbnhyofsnvfghffn ufvnsnowfuhrnvfjkksvh n gvsicefh hr7gjshvythdisiqhdvjxksfyru ueyfhwiiwhfjfoftyfjkcei573ikdgjskqpqlzueoq,mncbx,z.qwertyuioopbdfvxnvd km c ca fvf. v jld