Population size is kept according to the carrying capacity of the land.
do you think a hand-crank flashlight would be a good energy system for the rescue workers? Why or why not?
Answer:
No.
Explanation:
No, hand-crank flashlight would not be a good energy system for the rescue workers because the light turns on by applying muscle force on the hand-crank flashlight and after that, the device convert muscle force into electric energy and the light turns on and we know that the rescue worker have a tough job which requires both hands so this hand-crank flashlight is not useful to him.
Describe the structure and function of the cell membrane.
Answer:
The cell membrane, therefore, has two functions: first, to be a barrier keeping the constituents of the cell in and unwanted substances out and, second, to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.
Explanation:
When ___________ occur(s) during DNA replication, it can lead to genetic variation after a cell divides into daughter cells.
A) Mutation(s)
B) Adaptation
C) Conjugation
D) Reproduction
Answer:
I believe it is D. Reproduction
Explanation:
FAST PLEASE!!!!!!!! IM BEING TIMED HELP!!!!!! BRAINLYEST
Caused by differences in the density of ocean water; flows slowly.
Gulf Stream
deep current
surface current
Answer:
it is either B or C but probably C
24. Why is pure water neutral?
a, more hydronium than hydroxide
b. equal numbers of hydronium and hydroxide
c. more hydroxide than hydronium
d. none of the above
Answer:
B
Explanation:
Observing a human tissue sample under a microscope would be an example of what division of anatomical study?
Answer: Histology is the study of the microscopic anatomy of cells and tissues of plants and animals. It is performed by examining a thin slice (section) of tissue under a light microscope or electron microscope.
Explanation:
I’m snapdragons flower color is controlled by incomplete dominance...
please help jdixnwjdj
Answer: Homeostasis
Explanation: One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. The lipid bilayer is selectively permeable to small, nonpolar substances. Proteins in the cell membrane include cell-surface markers, receptor proteins, enzymes, and transport proteins.
In the atmosphere, 50% of the air lies below an altitude of
Answer:
it is 89.0000655
Explanation:
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In the atmosphere, 50% of the air lies below an altitude of 89.0000655.
What do you mean by altitude of atmosphere?Exosphere. Located between about 700 and 10,000 kilometers (440 and 6,200 miles) above Earth's surface, the exosphere is the highest layer of Earth's atmosphere and, at its top, merges with the solar wind.
The commonly accepted end of earth's atmosphere falls within the thermosphere at 62 miles (100 kilometers) above the earth's surface. This commonly accepted boundary is called the Kármán Line.
The Stratosphere extends around 31 miles (50 km) down to anywhere from 4 to 12 miles (6 to 20 km) above the Earth's surface. This layer holds 19 percent of the atmosphere's gases but very little water vapor.
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Endoplasmic reticulum the Golgi apparatus, vacuoles, and lysosomes in a eukaryotic cell are made up of mostly what?
Answer:
Glucose (I think)
Explanation:
which statement correctly describes the relationship between genes, proteins, and traits?
Answer:
C. Genes are transcribed into mRNA, the mRNA is then translated into proteins, which determines specific traits.
Explanation:
Genes are segments of the genetic material (DNA) that encodes certain products, which are heritable. In the central dogma of biology, genes are expressed via two processes viz: transcription and translation.
Transcription is the process whereby the information in genes are used to synthesize mRNA molecule, while Translation is the process whereby the mRNA molecule is used to synthesize proteins in the ribosome.
The proteins are responsible for the individual characteristics or traits possessed by living organisms. For example, MELANIN GENE is transcribed into MELANIN mRNA, which is then translated into MELANIN PROTEIN responsible for the skin colour (trait).
Which statement best describes the function of nucleic acids?
A. Stores genetic information and helps to make proteins
B. Increases the rate of chemical reactions
C. Stimulates metabolism in all body cells
D
Activates secretion of the body's hormones
Answer:
A. stores genetic info and helps make proteins.
Explanation:
Nucleic acids are DNA and RNA.
The statement that best describes the function of nucleic acid is stored genetic information and helps to make proteins. The correct option is A.
What is nucleic acid?Nucleic acid is a macromolecule. Nucleic acid is made up of nucleotides. The composition of nucleotides is a 5-carbon sugar, a phosphate group, and a nitrogenous base.
Nucleic acid is the main component of the genetic material of the living organism. They are DNA and RNA. DNA is the main genetic material of animals and plants, and RNA is found in some bacteria and some plants.
DNA and RNA store the genetic information of the organism. As this, nucleic acid also contains genetic material. This genetic information is used in synthesizing proteins.
Thus, the correct option is A. Stores genetic information and helps to make proteins.
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The digestive system's main function is to
O protect the body against infectious diseases
O support and protect the body's organs.
O store nutrients until they are absorbed into the bones O break down food to be absorbed in the bloodstream.
Which statement best defines a protist? an organism that reproduces by spores and feeds on decaying matter a eukaryote that is either animal-like, plant-like, or fungus-like a foot-like extension that is used for eating and movement a long, whip-like extension that is used for movement
Answer:
B. A eukaryotic that is either animal-like, plant-like, or fungus-like.
Explanation:
A protist is best defined as an eukaryote that is either animal-like, plant-like, or fungus-like.
WHAT IS A PROTIST?A protist is an eukaryotic i.e. possess a membrane-bound nucleus organism that belongs to the kingdom Protista.
The kingdom Protista is different from all other kingdoms such as;
FungiAnimaliaPlantaeThis means that an organism classified as a protist can be defined as an eukaryote that is either animal-like, plant-like, or fungus-like.
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Enzymes speed up chemical reactions. Which statement correctly identifies the function of the enzymes involved in DNA replication?
A: Helicase adds hydrogen bonds to the template strand DNA polymerase breaks nitrogen bases
B: Helicase adds nitrogen bases to the template strand, DNA polymerase breaks hydrogen bonds
I
C : Helicase breaks nitrogen bases in the template strand. DNA polymerase adds hydrogen bonds
D : Helicase breaks hydrogen bonds in the template strand DNA polymerase adds nitrogen bases
Answer:
D: Helicase breaks hydrogen bonds in the template strand, DNA polymerase adds nitrogen bases
Explanation:
DNA replication is the process whereby DNA content is duplicated. This process of DNA replication is carried out with the aid of certain enzymes. Two of those important enzymes as stated in this question are DNA Helicase and DNA polymerase.
- DNA Helicase is the enzyme that breaks the hydrogen bonds that holds the two DNA strands in the molecule together. This separates the double-stranded DNA into two single strands.
- DNA polymerase is another enzyme that which carries out the nucleotide synthesis. DNA adds nitrogen bases to the new DNA strand based on what it reads on the DNA template
help pls help pls question is above
It is eitheir b or d
how many antennae’s does a dragonfly have?
Answer: Dragonflies have two antennae.
(hope this helps ^^)
When hydrogen and oxygen combine to form water, water is
Play
a product.
O a reactant.
both a product and a reactant.
O neither a product nor a reactant.
Answer:
water is a product
Explanation:
hydrogen and oxygen are the reactants combining together the make the final product of Water.
in your own words, explain why osmosis is really just a special case of facilitated diffusion
Answer: It describes water molecules moving across a membrane, which allows the water molecules to pass in and out freely, but forbids the motion of other molecules.
Explanation:
A in Biology class last year.
Osmosis is really just a special case of facilitated diffusion because it
doesn't permit the movement of some molecules.
Osmosis can be defined as the movement of solvent molecules such as
water from a region of higher concentration to a region of lower
concentration through a semi-permeable membrane.
Osmosis is however a special case of facilitated diffusion because it permits
the movement of water molecules and inhibits the movement of other
molecules such as sugar etc.
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please help asap i will mark brainliest
Answer:
the last one
it has one side that is positively charged and one side that is negatively charged
Answer:
D
Explanation:
A water molecule, because of its shape, is a polar molecule. That is, it has one side that is positively charged and one side that is negatively charged. The molecule is made up of two hydrogen atoms and one oxygen atom. The bonds between the atoms are called covalent bonds, because the atoms share electrons.
Do molecules crossing a membrane using active transport go WITH or AGAINST the concentration gradient??
Where do Earth’s convection currents occur?
A the lithosphere
B tectonic plates
C the asthenosphere
D the subduction zone
Answer:
B
Explanation:
B
An element is made up of how many types of atoms? Question 1 options: An element is made up of three types of atom. An element is not made up of atoms. An element is made up of only two types of atoms. An element is made up of only one type of atom.An element is made up of how many types of atoms? Question 1 options: An element is made up of three types of atom. An element is not made up of atoms. An element is made up of only two types of atoms. An element is made up of only one type of atom.
Answer:
✰It's the last option: An element is made up of only one type of atom.
✏︎Wich is D
✰An element is made up of only one type of atom. Is your answer!!✘
Explanation: if you look at the definition it said that....…..….…..…..…
~An element is a pure substance which cannot be broken down by chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei. The number of protons in the nucleus is the defining property of an element, and is referred to as the atomic number
PLZ Mark as brainliest
Type the correct answer in the box. Spell all words correctly.
What is Teddy's organization trying to accomplish?
Teddy is working for a nonprofit organization that urges people to stop using products with CFCs. Through this Initiative, Teddy's organization
hopes to reduce the concentration of
in the atmosphere.
Answer:
Greenhouse gases
Explanation:
Teddy is working for a nonprofit organization that urges people to stop using products with CFCs. Through this Initiative, Teddy's organization hopes to reduce the concentration of greenhouse gases in the atmosphere.
Greenhouse gases deplete the ozone layer thereby causing global warming as a result often increase in the intensity of Sun rays reaching the earth.
Example of greenhouse gases include chlorofluorocarbon, nitrogen, water vapor etc
In addition to liquid precipitation, which are present when freezing rain occurs. Choose one.
- Warm temperatures
- Cold surfaces
- Ice pellets
- Snowflakes
Answer:
Warm Temperature
Explanation:
Answer:
i think its A sorry if im wrong
Explanation:
To increase efficiency of cell processes, cells have adapted to do which two things?
Answer:
divide and develop organelles
Explanation:
3. The nitrogenous base, adenine, pairs with
A. Cytosine
B. Guanine
C. Thymine
D. Uracil
hurry please !
Answer: C) Thymine
Explanation: 100% sure this is the answer! pls mark brainliest!
PLS HELP!!!!!!
A ____ reaction is the change that takes place when two or more substances interact to form new substances.
Answer:
I think its chemical.
Explanation:
SORRY IF WRONG!! :(
Answer:
Chemical
Explanation:Give the precious smol bean the brainliest they deserve.
Select all of the following that are a result of heating up a solution?
Molecules will move faster
Molecules will slow down
Molecular movement will not change
More collisions will occur between molecules
Answer:
a
Explanation:
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.
The results of heating up a solution are:
Molecules will move faster
More collisions will occur between molecules
According to the kinetic molecular theory, when a solution is heated up:
The temperature of the solution risesThe attractive forces binding the molecules weakensThe speed of the molecules increases. This means that the molecules move faster than before The rate of collision between the molecules increases. This is because of an increase in the Kinetic Energy possessed by the molecules as the temperature risesTherefore, among the given options, the results of heating up a solution are:
Molecules will move faster
More collisions will occur between molecules
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Sucrose is made of which simple sugars?
glucose and fructose
fructose and galactose
galactose and cellulose
cellulose and glucose
Answer:
it is made of
glucose and fructose.
Sucrose is made up of simple sugars glucose and fructose. Thus, the correct option is A.
What are Simple sugars?Simple sugars may be defined as carbohydrates in their most basic form. Such types of carbohydrates contain only one to two sugar molecules and are digested quickly.
Monosaccharides and disaccharides are examples of simple sugars. Examples of simple sugars are glucose, fructose, and galactose.
Therefore, Sucrose is made up of simple sugars glucose and fructose. Thus, the correct option is A.
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