1
Write an expression that is equivalent to
a - 4.
NI
a-
4=
2
a-
?
2
24
Answer:243
Explanation: multiply all of them then add and it will be 243
The expression that is equivalent to a - 4 is: (a - 2) - 2 or (a - 6) + 2 or (a - 4) + 0 or (a - 8) + 4.
What is an expression?An expression in mathematics is a set of variables, constants, and operators that can be evaluated to produce a value.
For example, the expression "2x + 3" contains the variable x, the constants 2 and 3, and the operators + and *.
When we substitute a value for x, such as x = 4, we can evaluate the expression to get a value, in this case 11.
The expression that is basically equivalent to a - 4 is:
(a - 2) - 2 or (a - 6) + 2 or (a - 4) + 0 or (a - 8) + 4.
For example,
If a = 6, then a - 4 = 6 - 4 = 2, and we can also write it as (6 - 2) - 2 or (6 - 6) + 2 or (6 - 4) + 0 or (6 - 8) + 4. All of these expressions simplify to 2.
Thus, this can be the expression asked.
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Which of these conditions is least likely to cause a species to become extinct due to environmental changes?
A.Specific food preferences
B.More competition for food
C.More genetic variation
D.Less genetic variation
I will give brainly for the right answer.
Answer:
B. More competition for food
elements that has atoms of more than one molecular mass
Which set of events occurs in the S phase?
a. cell growth and DNA replication
b. cell growth and mitosis
c. mitosis and cytokinesis
d. DNA replication only
Answer:
D
Explanation:
DNA replication occurs during this S (synthesis) phase.
a deer eats a leaf from a tree and gets energy from sugar molecules in the leaf. which two organelles are required to make this process possible
Answer:
Not 100% if this will help or if this is what you are looking for but...
When an animal eats the plant, the animal can use the plant's sugars as energy. This is how all animals get their energy from plants. Photosynthesis happens in organelles called chloroplasts.
Explanation:
Hope this helps a little.
At the end of mitosis two identical cells are produced.
true
false
Answer:
True
Explanation:
At the end of mitosis, one cell produces two genetically identical daughter cells.
how can hunters and wildlife managers work together to maintain ecosystems in park and preserves
Answer:
Filling out questionnaires.
Participating in surveys.
Stopping at hunter check stations.
Providing samples from harvested animals.
Funding wildlife management through license fees.
If an organism has 48 as its diploid number, how many chromosomes will each cell have at the end
of meiosis I?
O 24
O 12
0 48
O 96
Answer: The answer is 96
Explanation:
Which bar graph best represents the equatorial diameters of the eight planets of our solar system?
Answer: The First one/ A /Top Left corner
Explanation:
Equatorial distance shows the size of a planet. The larger the distance, the larger the planet.
Option A puts Jupiter as having the largest distance which is correct as Jupiter is the largest planet and is followed by Saturn and then Uranus and Neptune in that order.
Option A also shows Earth as being larger than Mars, Venus and Mercury which is accurate as well.
Option A is the best choice.
classify the following materials as rock or mineral
Answer:
You did not provide us with the materials you need to be classified, but I hope this helps:
A mineral is a solid formation that occurs naturally in the earth while a rock is a solid combination of more than one mineral formations which is also occurring naturally. A mineral has a unique chemical composition and is necessarily defined by its crystalline structure and shape.
Examples of rocks include: sandstone, basalt, limestone, and slate
Examples of minerals include: cobalt, zinc, lithium, and gold
Stuart is listing the changes to matter and energy that occur during the process of photosynthesis. Which of these examples should he include in his list?
A. nuclear changes that convert hydrogen and oxygen into carbon
B. chemical changes that convert carbohydrates into smaller molecules
C. changes that convert light energy into chemical energy stored in carbohydrates
D. changes that convert chemical energy into heat and light
Answer:
C. Changes that convert light energy into chemical energy stored in carbohydrates
Explanation:
Just had this question on a bio assignment.
Photosynthesis occurs in plants containing chlorophyll in which the solar energy entrapped is converted into the chemical fuel needed for energy generation.
The correct answer is:
Option C. Changes that convert light energy into chemical energy stored in carbohydrates.
This can be explained as:
The leaves of plants capture the rays and with the help of water and carbon dioxide create glucose and oxygen.The nourishment or the nutrient includes carbohydrates that get broken in the presence of solar energy and experience chemical changes.Therefore, during photosynthesis light energy is transformed into chemical power.
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When a red flowered pea plant was crossed with a white flowered pea plant, it was found that all plants in the F1generation carried only red flowers. If these plants are self crossed, i) Find the genotypic ratio that we can expect in F2 generation ii) What is the phenotype and genotype of F1 generation. Draw Punnett square for F2
Answer:
The correct answer is -
i) genotype of F2 - 1:2:1 = dominant:heterozygous:recessive
ii) genotype of F1 - all heterozygous dominant
phenotype - all red
Explanation:
In the cross of red- flowered plant and white flowered plant the offspring produces red flowers that s only possible if the parent red flower plant has both alleles in dominant condition.
For the F1 the gametes will be R, R and r, r
from the Punnett square, we can see all the offspring are heterozygous (Rr) in genotype and red in phenotype
For F2 the gametes will be - R, r, and R, r
From the punnet square, the genotype we get is 1:2:1 = dominant:heterozygous:recessive
Which of these best describes Earth’s core?
A. Most dense layer, consists of the outer and inner parts.
B. Thinnest under the oceans and thickest under continents.
C. Middle layers, density increases with depth and pressure increases.
D. Least dense layer overall, consists of two layers of different thickness.
Answer: A.
Explanation:
There core, or inner layer, is the most dense due to its magnetic pole, not to mention, the core is comprised of multiple molten materials, heated so hot, tht it practically exist between two states of matter simultaneously.
Answer:
A. Most dense layer, consists of the outer and inner parts
Please helpppppppppppppppp
Answer:
c
Explanation:
Which organic compound is NOT correctly paired with its monomer?
A) Carbohydrate --- monosaccharide
B) Lipid - Dextrose
C) Protein - Amino Acid
D) Nucleic Acid - Nucleotide
Lipase is best classified as which type of protein?
The main function of this system is to
A. Recycle water
B. Transport Oxygen
C Produe hormones
D. Remove waste
Answer:
remove waste
Explanation:
Answer:
D. main function is to remove waste
Please help me with this. Will Mark Brainliest
Which of these belongs to a trophic level with the most energy?
Berries
Grasshopper
Mice
Owl
Answer:
berries
Explanation:
yw
Answer:
a berries
Explanation:
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A student is examining the liquid mercury inside a thermometer. If the liquid is composed of only mercury atoms, what can the student conclude?
A :the liquid is an impure substance because it is in a liquid state.
The liquid is a pure substance because it is made up of elements
The liquid is an impure substance because it is inside a thermometer.
The liquid is a pure substance because it is made up of mixtures.
Answer:
b
Explanation:
DID IT
Mercury is used in thermometers to estimate temperatures. Liquid mercury composed of Hg atoms is a pure substance that consists of single elements. Thus, option B is correct.
What are pure substances?Pure substances are chemicals that are matter and have been known to have distinct chemical properties because of their constant and definite composition. The physical methods of separation can not be used to separate the pure substances.
The liquid mercury is a pure substance as it has been composed of only one type of elemental atom Hg. All of its composition has been carrying the Hg atoms uniformly that possess and exhibit the same chemical and physical characteristics.
Therefore, option B. the liquid mercury is a pure substance as it is made of the same type of element.
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Based on the graph, what does the point (1, 300) represent?
Answer:
1,3
Explanation:
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Which cell structures are seen in prokaryotic and eukaryotic cells?
nucleus
cell membrane
mitochondria
DNA
ribosomes
cytoplasm
DONE
What is the chemical reaction in the equation NaCl (s) → Na + (aq) + Cl - (aq)
Answer:
2 Na + Cl 2 → 2 NaCl The physical states of reactants and products are included where necessary. The symbols used are: ( s ) for solid, ( l ) for liquid, ( g ) for gas, and ( aq ) for aqueous (water) solutions.In the case of sodium chloride formation, the equation is modified accordingly.
Explanation:
The part of the plant where you would find the most cellulose is ? ( dont say cell walls , im looking where at
a-leaves
b-roots
c-branch
d-stem
Answer:
d-stem
Explanation:
Cellulose is most abundant in meristems tissues which are present in the tips of the root and stem and in the cambium between the xylem and the phloem and under the epidermis of the trees and shrubs, therefore it is abundant in the stems.
Meristems are also found in other parts of the plant but it is mostly abundant in the stems.
Meristems are the cells that are responsible for the cell growth and elongation.
Which of the following explains why a breeding-soundness examination is performed?
to determine the age of the animal
to determine what traits will be passed on to offspring
to determine what genes were inherited from parents
to determine the likelihood of fertility
Answer:b
Explanation:
The statement to determine what traits will be passed on to offspring explains the breeding-soundness examination is performed.
What do you mean by breeding soundness examination?The breeding soundness examination (BSE) involves a complete and systematic evaluation of the reproductive potential of a given male, including mating ability and libido, general physical examination.
The breeding soundness exam (BSE) is much more than a “semen test.” It consists of a physical exam that should include examination of the eyes, feet and legs, teeth (if an older bull), and general overall condition.
By following out breeding system i.e., crossbreeding, selective breeding and grading up according to the need, results in improvement in production performance of the crossbred.
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Answer True or False.
1. Most plants have three main parts. true
2. A plant's leaves carry water to the roots.
3. Chlorophyll helps plants make food true
4. Roots hold plants in the soil.
5. Stems give off carbon dioxide into the air.
6. Some plants have roots that are branched
7
Root hairs take in oxygen from the air.
What is the best explanation for the faster times of the group fed a pre-race meal of bread with bananas and honey
Answer:
Bread, bananas and honey have carbohydrates.
Explanation:
The group fed a pre-race meal of bread with bananas and honey because bread, bananas and honey have high amount of carbohydrates which give quick energy to the athlete. This carbohydrate is a macromolecule which is quickly converted into micromolecule i. e. glucose that is absorbed by the cell and the mitochondria of the cell produces energy in the form of ATP that is used by the athlete in running.
All 12 body systems interact to maintain ________________.
Answer:
homeostasis!
Explanation:
Answer:
The body systems constantly interact with each other to maintain homeostasis.
Describe the movement of the water molecules at hot temperatures.
Answer:
Temperature causes water molecules to move more quickly, because each individual molecule has more energy as it gets hotter (according to Kinetic molecular theory). If you get water hot enough, the molecules move so much that the hydrogen bonds that hold them together start to break and the water becomes a gas
Explanation:
one different between prokaryotes, and eukaryotes is that prokaryotes do not have.
A: a nucleus,
B: cytoplasm
C: a cell membrane
D: DNA
Answer:
A a nucleus
Explanation:
since prokaryotes have their DNA in the cytoplasm they do not have a nucleus
Human impact on our ecology review
Answer:
Humans have impacted nature in a lot of ways. I also think that society has shifted humanity away from what matters most in life, we've changed as a species and I want to keep it as real as possible. but uh... what was your question?
Explanation:
May I have brainliest please? :)
Answer:
Impacts from human activity on land and in the water can influence ecosystems profoundly. Climate change, ocean acidification, permafrost melting, habitat loss, eutrophication, stormwater runoff, air pollution, contaminants, and invasive species are among many problems facing ecosystems.
Explanation:
Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.