Which statement is true? Prokaryotic cells have multiple membranes. Eukaryotic cells have multiple membranes. Prokaryotic cells do not have a membrane. Eukaryotic cells have one membrane.
Answer:
eukaryotic cells have one membrane
An ecosystem has 150 organisms of 15 different species. What is the biodiversity index of this ecosystem?
Answer:
0.1
Explanation:
To calculate this, scientists use a formula called the biodiversity index in order to describe how much are the species of a given area diverse. It is calculated by taking the number of species in the area and divided by the total number of individuals in that area. This gives us the biodiversity index.
In this example, there are 15 species in an area and we divide that by 150 organisms to get a 0.1 biodiversity index.
Biodiversity Index is used to measure the biodiversity of an ecosystem. The biodiversity index of the given ecosystem is 0.1.
Biodiversity Index:
It is a measure of species diversity in the particular area. This can be calculated by sing the formula,
[tex]\bold{I_b_d = \frac{nS}{nO} }[/tex]
Where,
nS - number of species = 15
nO - total number of organisms = 150
Put the values in the formula,
[tex]\bold{I_b_d = \frac{15}{150} }\\\\\bold{I_b_d =0.1}[/tex]
Therefore, the biodiversity index of the given ecosystem is 0.1.
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Where did DDT come from?
Answer:
Originally developed as an insecticide, it became infamous for its environmental impacts. DDT was first synthesized in 1874 by the Austrian chemist Othmar Zeidler. DDT's insecticidal action was discovered by the Swiss chemist Paul Hermann Müller in 1939.
Part II: For each of the genotypes below, determine what phenotypes would
be possible
Brown eyes are dominant to blue eyes
4. BB
5. Bb
6. bb
Short tails in cats are recessive to long tails.
7. TT
8. Tt
9. It
Answer:
4. Brown
5. Brown
6. Blue
7. Long
8. Long
9. Short
Explanation:
Dominant alleles are always expressed when they are present. Recessive alleles are masked by dominant alleles.
Therefore, two copies of a recessive allele are required to show the recessive trait. Either one or two copies of a dominant allele produces the dominant trait.
Therefore, for dominant brown eyes, BB or Bb gives brown eyes, bb gives blue eyes.
For recessive long tails, tt gives short tails, TT and Tt gibe long tails
What would happen to the concentrations of ATP, NADPH and Sugars if PSII stopped working?
ATP - decrease, stay the same, increase
NADPH - decrease, stay the same, increase
sugars - decrease, stay the same, increase
Answer:
1. ATP - decrease
2.NADPH - decrease
3. sugars - decrease
Explanation:
Photosynthesis is a type of biosynthesis that produces glucose from the reactants: sunlight, carbon dioxide, and water. It occurs in the chloroplast in two phases, the light-dependent, and light-independent/dark reactions where sugars are made. Pigments like chlorophyll absorb light energy at specific wavelengths in the light reaction which activates photosystems
Here:
chlorophyll forms photosystems (PS I & PSII) with proteins called a complexPS II absorbs and transfers light energy to the reaction core. a water molecule is split apart to form an electron, H+ and oxygenElectrons are shifted to photosystem I from photosystem II. ATP and inorganic phosphate are synthesized from ADP. H+ is added to NADP to form NADPHThe NADPH is integral to the Calvin Cycle, as part of the light independent reactions- these synthesize sugar molecules.
If PS II no longer works, there will be less ATP, NADPH, and no sugars produced.
What would happen to the concentrations of ATP, NADPH and Sugars if Photosystem II (PSII) stopped working is a: decrease.
During photosynthesis, the primary acceptor of carbon are Photosystem I (PSI) and Photosystem II (PSII) because it occurs in a light-dependent reaction.
Photosystem II (P680) is a large membrane protein complex which serves as a primary acceptor of carbon during a light-dependent reaction.
However, the following would happen when the Photosystem II (P680) stops working:
A decrease in the concentrations of ATP.A decrease in the concentrations of NADPH.A decrease in the concentrations of Sugars.Read more: https://brainly.com/question/12827458
Which three statements describe ways the earths atmosphere protects living things?
A.The atmosphere keeps the biospheres temp in a comfortable comfortable range
B.The atmosphere allows space objects to crash into Earth
C.The atmosphere blocks solar radiation that would harm living things
D.The atmosphere provides gases that living things need
Answer:
A, C, D Brainliest plsss
Answer:
a,c,d
Explanation:
PLS HELP!!!!!! to answer these questions fill in the blank with the answer. A _________ is a single-celled biotic pathogen that is infectious. A _________ is an abiotic pathogen that is infectious. A _________ is a biotic pathogen that lives off its host. A _________ is a biotic multi-celled pathogen that causes infections like ringwor
Answer:
Bacteria
Virus
Parasite
Fungi
Explanation:
A Bacteria is a single-celled biotic pathogen that is infectious. Bacteria are prokaryotes(single celled) and also form part of the disease causing organisms .
A Virus is an abiotic pathogen that is infectious.
A Parasite is a biotic pathogen that lives off its host. It sometimes uses structures such as hooks to obtain nutrient material from its host.
A Fungi is a biotic multi-celled pathogen that causes infections like ringworm.
Can carbon atoms bond with other atoms to form long chains?
Answer:
yes
Explanation:
Answer:
The Uniqueness of Carbon
Because each carbon is identical, they all have four valence electrons, so they can easily bond with other carbon atoms to form long chains or rings. In fact, a carbon atom can bond with another carbon atom two or three times to make double and triple covalent bonds between two carbon atoms.
Explanation:
The following four ears of corn were taken from separate plants. Each kernel represents an offspring. The kernels on the four ears were counted for the color trait (purple or white) and/or sweetness trait (starchy or sweet). The data gave these phenotypic ratios for the four ears:
Ear #1 – 3 purple : 1 white
Ear #2 – 3 starchy : 1 sweet
Ear #3 – 9 purple, starchy : 3 purple, sweet : 3 white, starchy : 1 white, sweet
Ear #4 – 1 purple : 1 white
Which traits are recessive?
Answer:
the answer is white and sweet, i just took the quiz
Explanation:
The phenotypic ratio provides information about how many genes are involved in the cross, which is the dominant trait and which is the recessive trait. In the exposed example, white and sweet are the recessive traits.
-------------------------------
By looking at the phenotypic ratio of the progeny, you can tell which trait is the dominant one and which is recessive.
Let us assume two diallelic genes, each coding for one trait.
Let us also say that these genes assort independently -they are not linked-, and they do not interact with each other.
When we are only considering one single gene,
the phenotypic ratio after crossing two heter0zyg0us individuals is 3:1. In these situations, we expect to see 3/4 of individuals expressing the dominant trait, and 1/4 expressing the recessive trait.the phenotypic ratio after crossing a heter0zyg0us individual with an h0m0zyg0us recessive one is 1:1. We expect to see 2/4 of the progeny expressing the dominant trait and 2/4 the recessive trait.When we are only considering two genes simultaneously, we expect to find the following phenotypic ratio 9:3:3:1
9/16 individuals expressing both dominant traits3/16 individuals expressing one dominant trait and one recessive trait1/16 individuals expressing both recessive traits.
Now let us analyze each Ear,
Ear #1 – 3 purple : 1 white
Only the color trait is considered. The phenotypic ratio is 3:1Two heter0zyg0us individuals must be involved in the cross3/4 are purple and 1/4 is whiteDominant trait: purpleRecessive trait: white
Ear #2 – 3 starchy : 1 sweet
Only the sweetness trait is considered. The phenotypic ratio is 3:1Two heter0zyg0us individuals must be involved in the cross3/4 are starchy and 1/4 is sweetDominant trait: starchyRecessive trait: sweetEar #3 – 9 purple, starchy : 3 purple, sweet : 3 white, starchy : 1 white, sweet
Both traits are considered. The phenotypic ratio is 9:3:3:1Two dihybrid individuals must be involved in the cross9/16 are purple and starchy, 3/16 are purple and sweet, 3/16 are white and starchy, and 1/16 is white and sweetDominant trait: purple and starchyRecessive trait: white and sweetEar #4 – 1 purple : 1 white
Only the color trait is considered. The phenotypic ratio is 1:1One heter0zyg0us individual and one h0m0zygous recessive individual must be involved in the cross2/4 are purple and 2/4 are whiteDominant trait: PurpleRecessive trait: WhiteThe recessive traits are white color and sweet taste.
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Aerobic respiration occurs when
Answer:
You got O2
Explanation:
Aerobic=W/ oxygen
Answer:
In cells, glucose and oxygen react together to create carbon dioxide and water, and energy is released. As oxygen from the air is needed for it to function, the reaction is called aerobic respiration. Energy in the reaction is released. The mitochondria located in the cytoplasm of the cell are where most breathing occurs.
Explanation:
how do vaccines affect viruses?
• vaccines kill viruses
• vaccines destroy bacterial infections
• vaccines stop viruses from replicating
• vaccines cure viral infectious diseases
Answer:
Vaccines stop them from replicating
Explanation:
Vaccines stop them from replicating
Compare transcription with dna replication
how to convert 8.3 micrometers to meters
8.3 × 10-6 meters=77 meters
Answer, =8.3=77 meters
What are three independent variables in these experiments
Answer: A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled. The independent variable is the one that is changed by the scientist.
Explanation:
FOR THE SECOND TIME-----Ughhh can someone answer this dang biology question I cant!!!!! I will mark you brainliest!!Referring to the graph, what phases together would account for approximately 25% of the time spent from a cell in the cell cycle?
A) M phase and S phase
B) S phase and M phase
C) G1 phase and M phase
D) G2 phase and M phase
Answer:
D. G2 phase and M phase
Explanation:
If we are looking for what takes up 25% of the graph, that would be the last option. If you look at G1, it takes up about 50%. So, G1 phase and M phase would take up more than that, and we want 25% not 50+. The M phase and S phase would take up about a third, so no. The G2 phase and M phase takes up roughly 25% or, it's the closest to this.
What process do plants use to create carbohydrates?
A. Respiration
B. Photosynthesis
C. Hydroxyl bonding
D. Starch synthesis
Answer:
B
Explanation:
Carbonivoxide combine with water in presence of sunlight to form carbohydrate
The question is marked with red color. Please help me
Answer:
Deserts
Explanation:
Short for desertification
All eukaryotic cells contain mitochondria. What does this mean?
All eukaryotic cells perform photosynthesis
All eukaryotic cells are living
All eukaryotic cells respire
All eukaryotic cells create ATP to move.
Answer:
Your answer is D) "All eukaryotic cells create ATP to move."
Some viruses attack cells by attaching to their outer covering, entering, and taking over their genetic "machinery". Viruses are able to invade cells after first attaching to their
A. nuclear membrane
B. Viral proteins
C. Genetic Memory
D. Cell membrane
E. Other
Answer:
I think cell membrane is answer
Viruses are able to invade cells after first attaching to their Cell membrane.
What are viruses?A virus is an infectious microorganism made up of a protein-coated segment of nucleic acid (either DNA or RNA). A virus can't multiply by itself; it has to infect cells in order to utilise the host cell's components to make copies of itself.
A virus frequently causes harm to the host organism by killing the host cell in the process. AIDS, COVID-19, measles, and smallpox are well-known examples of viruses that cause human disease.
Viruses can infect people. But in reality, viruses infect a wide variety of organisms. For example, there are viruses that infect fungi and viruses that infect bacteria.
Therefore, Viruses are able to invade cells after first attaching to their Cell membrane.
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#SPJ2
7. Precizeaza dacă afirmatia este adevarată sau falsă. Transformă afirmatia falsă in una adevarată. 1p În măduva spinării se inchid reflexe voluntare. Înlănțuirile de reflexe condiționate într-o anumită ordine sunt instincte ca apărarea fată de foc. Substanța cenusie formeaza în creierul mare scoarta cerebeloasă.
Answer:
False.
True.
True.
Explanation:
Voluntary reflexes close in the spinal cord. (False).
Chains of reflexes conditioned in a certain order are instincts like defense against fire. (True)
The gray matter forms the cerebellar cortex in the large brain. (True)
Voluntary actions are done with consciousness and controlled by the brain, while reflex actions are done with unconsciousness and controlled by spinal cord. Reflex actions are the sudden actions taken by the spinal cord instead of brain because this action is performed quickly in order to avoid the damage.
As the average kinetic energy of the particles in a gas increases, which of the following
occurs? (1 point)
The temperature of the gas increases.
The temperature of the gas decreases.
The number of particles increases.
The number of particles decreases.
Answer:
Amontons’s law. If the temperature is increased, the average speed and kinetic energy of the gas molecules increase. If the volume is held constant, the increased speed of the gas molecules results in more frequent and more forceful collisions with the walls of the container, therefore increasing the pressure
Which procedures were followed in this lab to decrease experimental error? Check all that apply.
using different volumes of solution during each step
using three different temperatures instead of only two
using different types of vinegars with different chemical formulas
using water as a baseline for comparison
using different types of limestone in each step
Answer:2&4
Explanation:
:)
Answer:
b and d
Explanation:
Provide three examples of asexual plant structures
30 POINTS! NEED HELP ASAP
Answer:
we can do it together.. we can do a zoom call.... im workingon that right now
Explanation:
lol im doin the same thing
Although every zebra has a unique pattern of black and white stripes, the differences are very subtle. The main evolutionary advantage of the stripes is the protection they provide against lions, the main predators of zebras on the African plains. When a zebra herd is packed together, a lion cannot distinguish individual zebras from one another, making it difficult to attack them.
Hi, you've asked an unclear question. However, I inferred you likely need affirmation whether the statement made is true.
Answer:
True
Explanation:
Indeed, zoologists have discovered that stripes on Zebras play an important role in preventing predators from attacking them. It is believed that their unique pattern of black and white stripes acts as a camouflage making them difficult to be spotted by predators.
Despite these findings, scientists are still researching reasons for such observations and they hope to find real-world applications of this natural design.
Discuss some of the advantages to having a cycle that partially replenishes itself. In the Calvin cycle, what would happen to the cycle if there was no carbon dioxide available?
Answer:
The carbon atoms used to build carbohydrate molecules come from carbon dioxide, the gas that we exhale with each breath.
Explanation:
Dark reactions are also referred as "light independent reactions" (since they can occur during day or night) or as "carbon-fixation" (since carbon dioxide is taken from the air and carbon is affixed to compounds in the plant) or as the Calvin Cycle (named for the person who discovered it).
the
The goal of the Integrated Pest Management system is to
pest population.
Answer:
The goal of integrated pest management is not to eliminate all pests; some pests are tolerable and essential so that their natural enemies remain in the crop. Rather, the aim is to reduce pest populations to less than damaging numbers.
Explanation:
Brainliest please?
how many carbon molecules are needed to make one glucose molecule
Answer: For each molecule of glucose produced: 6 water water molecules are oxidized, and become the source of electrons for carbon dioxide reduction. 6 molecules of carbon dioxide are required, one for each carbon atom in glucose.
how many chromosomes are present in each cell? according to the picture
Answer:
Well, there are 2 chromosomes in each cell. The X shaped things are chromosomes.
Explanation:
Which of the following is the branch of science that studies organisms such as bacteria and yeasts?
A. Physiology
B. Microbiology
C. Anatomy
D. Histology
Answer:
B- microbioligy
Explanation:
B is your answer you looking for my guy