Answer:
Index Fossils
Explanation:
Index fossils are used by scientists to help them figure out the dating of discovered fossils or the correlation. They are also very known to appear in a (very) certain/specific age range.
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Please Help! This is due in 5 minutes!
Whose work showed that the fossils in caves were, in fact, a result of accumulation over time rather than the result of one cataclysmic event?
A. Gideon Mantell
B. William Buckland
C. Charles Lyell
D. Richard Owen
Answer:
C. Charles Lyell
Explanation:
Lyell argued that the formation of Earth's crust took place through countless small changes occurring over vast periods of time, all according to known natural laws.
Pleas help fast! I am not happy with my grade on this and I'm on my last try!
Answer:
im pretty sure its A and B
PLEASE MARK BRAINLIEST !!!!!!!
HELP PLEASE
Gregor Mendel finished his pea plant experiments in 1863 and published his results in 1866. However, few scientists saw Mendel’s paper for three decades. Even after all that time, Mendel’s discoveries revolutionized the field of genetics. What did Mendel discover about the principles of heredity? Choose the two statements that apply.
A. Individuals get one factor for a trait from each parent.
B. Genetic material is genes on DNA.
C. A dominant factor can hide the expression of a recessive factor when both are present.
D. Mothers contribute factors for some traits while fathers contribute factors for others.
I think that the answer here would be A and C.
Answer:
I agree. A and C would be the correct answer!
Please help i don’t understand this question for my biology class
Answer:
I believe it is receptors
When a person becomes infected with the influenza virus, cell-mediated immunity is activated. Why would the influenza virus initiate cell-mediated immunity? Describe the process of cell-mediated immunity as it would attack the influenza virus.
Cell-mediated immunity involves the activation of different specialized cells present in the immune system.
What is cell-mediated immunity?Cell-mediated immunity is a type of adaptive immune response that involves the activation of different specialized cells present in the immune system.
These cells include, among others, phagocytes (macrophages), cytotoxic T-lymphocytes, etc.
Cell-mediated immunity also involves the release of chemical messengers such as cytokines that activate immune responses (e.g. inflammation).
These immune responses act in a concerted mode to recognize and attack antigens present in the flu virus.
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prokaryotic cells have nulcleus
Answer:
not nucleus, only nucleoid
Answer:
Prokaryotic cells are surrounded by a plasma membrane, but they have no internal membrane-bound organelles within their cytoplasm. The absence of a nucleus and other membrane-bound organelles differentiates prokaryotes from another class of organisms called eukaryotes.
Explanation:
hope it helps, God bless!
Natural selection requires there to be a variation of alleles in a population. What mechanism best describes how new alleles are formed in a population
Answer:
Natural selection does not create adaptions, mutations, or variations. Natural selection causes the extinction of individuals who are not well adapted to changes in the environment. Natural selection can also provide reproductive advantages for some individuals over other individuals.
Characteristics of plant cells include which of the following? Select all that apply.
cell plate in cell division
cleavage furrow
large hypertonic vacuole
no chlorophyll or chloroplasts
no cell wall, only plasma membrane
Answer:
large hypertonic vacuole
cell plate in cell divison
Explanation:
All other options are for animal cells.
Answer: select the 1st and 3rd
Explanation:
Plant cells divide in two by constructing a new cell wall (a plate) A plant cell has 1 large vacuole while an animal cell has more than 1 vacuole which is smaller compared to the vacuoles of a plant cell.
Why is biochemical evidence the strongest form of evolutionary evidence
Answer:
Biochemistry provides evidence of evolution in terms of modifications in various biological molecules, such as enzymes Explanation:
Answer: Try this Why is biochemical evidence the strongest form of evolutionary evidence
Explanation: It will give you some important information of what you are learning in high school!
Which is TRUE about skeletal
muscles?
A. They are not striated.
B. They are found in the heart.
C. They tire quickly.
D. They are involuntary.
What is the difference between force and net force?
Don't copied from goo-gle
Force
- Force is defined as the act of pushing or pulling of an object. It can influence and alter the motion of an object.
Net Force
- Unlike Force which only defines a push or pull, Net Force is the combination of all forces acting on an object. The Net Force can be computed through Newton's Second Law, F=ma.
If I accidentally cited false information, I am open to corrections :).
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Assume all of the presynaptic synapses identified produce epsps. If two of these synapses fired simultaneously, which synaptic combination brings the initial segment closest to threshold based on spatial summation?.
The synapses that are nearer to the axon hillock would bring the initial segment closest to the threshold based on spatial summation.
What is neuron synapsis?In neurosciences, the term synapsis makes reference to the connection between two nerve cells (neurons).
Synapsis is produced by the connection between axons and dendrites among different neurons.
Spatial summation refers to the start (trigger) of the action potential in neurons via two or more presynaptic cells.
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This is a simplified coastal Maine food web. Analyze the model. Select the phrases that accurately describe the flow of energy in this marine ecosystem. Select ALL that apply. A) Harbor seals receive 10% of the energy of the zooplankton. B) Herbivores have more energy available to them than carnivores. C) Primary consumers have the greatest amount of energy available. D) There should be fewer tertiary consumers than secondary consumers. E) Of the energy that is available to the producer level, only ten percent is available to the secondary consumers.
The statements 'harbor seals receive 10% of the energy of the zooplankton', 'primary consumers have more energy ' and 'fewer tertiary consumers than secondary' are TRUE.
What is a food web?A food web is a diagram representing the connections between organisms in a particular ecosystem.
A food web is based on producer organisms that generate the biomass that sustains all life in the web.
Consumes such as herbivores and carnivores are placed at higher trophic levels in the food web.
Learn more about food webs here:
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Environmental changes may lead to the evolution of a species. Polar bears live in
the Arctic. Ice in the Arctic is melting fast, reducing the range where the polar
bear can live. If polar bears do not have adaptations that allow them to survive
these changes, what may happen to them?
A They may become extinct.
B They may overpopulate.
C They may change the environment.
D They may become another species.
Answer:
A.
Explanation:
If they have know where to live, they can't overpopulate. The question ask what will happen to the polar bears so C can no be it. Polars Bears do not have the features for them to become another species.
What process describes how pollen is produced and moved during plant reproduction?
Which answer?
After pollen is produced by the pistil, it is moved down the stamen and received by the ovule.
The ovule receives the pollen produced by the stamen and sends it to the pistil.
The stigma receives pollen produced by the stamen and sends it down the pistil to the ovule.
The pistil produces pollen and sends it up to stigma for the ovule to receive.
Answer: I don't know
Explanation:
i'm not smart
A scientist discovers a cell that has chloroplasts, cytoplasm, DNA, and a cell membrane. Which statement best describes how the cell could be classified?
The cell is prokaryotic because it has DNA.
The cell is prokaryotic because it has cytoplasm.
The cell is eukaryotic because it has a cell membrane.
The cell is eukaryotic because it has chloroplasts.
Why is saturated fat found in so many animal products?.
Food webs model the way _______ move through an ecosystem.
Food webs model the way energy move through an ecosystem
What is food webFood web is a chain of food chains contained in an ecosystem, It models the way through which energy is transferred through the ecosystem. The food chains represents the path through which energy is transferred.
Hence we can conclude that Food webs model the way energy move through an ecosystem.
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Paragraph 3 describes the diagram at the top of this article. It demonstrates:
A: that energy flows in one direction beginning with light energy
B: the transportation of sugars into mitochondria
C: the Krebs Cycle
D: the Calvin Cycle
Photosynthesis involves a series of reactions including trapping of sunlight energy and the Calvin cycle through which plants make their food in the form of sugars.
What is metabolism?Metabolism refers to the sum of reactions that occur in a living organism which helps obtain energy and remove waste in order to sustain the life of an organism.
Different metabolic reactions take place in plants and animals.
In plants, energy is obtained from the sun and is used to drive photosynthesis.
The sugars made in photosynthesis are stored in roots, stem and tubers as well as in fruits.
The sugars can be broken down to produce energy in th mitochondria.
The Calvin cycle is the process that plants use to convert carbon dioxide and water to sugars
The Krebs cycle is a cycle which produces molecules which are used to produce energy in the mitochondria.
Therefore, since the diagram is not attached, the process shown can be understood from the explanation of each process in photosynthesis and metabolism.
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The study of the flow of energy and its transformations is called:.
The study of the flow of energy and its transformations is called thermodynamics.
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Select the correct answer from each drop-down menu.
Fats are an important dietary requirement that plays several roles in the body. Fats transport fat-soluble vitamins in the body, such as
1.₋₋₋₋₋₋₋₋₋₋₋₋₋₋₋ The body can’t synthesize 2. ₋₋₋₋₋₋₋₋₋₋₋₋₋₋ it and must obtain it through dietary intake.
1. one answer to are
vitamin B12
vitamin C
vitamin D
2. linoleic acid
omega_3 fatty acid
cholesterol
100 points for this
Answer:
For Answer One it is (vitamin B12) From What I Got
For Answer Two It Is (omega_3 fatty acid) From What I Got
If it is wrong let me know i will try to fix it
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What are some ways that scientists and engineers are using our understanding of DNA?
Compare the costs and benefits of living in a group of animals.
What is the reaction catalyzed by aminoacyl-trna synthetases that is essential for translation?.
true breeding parents ______ trait variant(s) to there offspring A might only pass 1 B will pass 2 C can only pass one D will not pass
True breeding parents might only pass one (1) trait variant to their offspring (Option A).
What is true breeding?A true-breeding can be defined as a special type of mating where parents produce offspring that have the same phenotype.
True breeding occurs when parental lines having a given phenotype generate descendence with this same phenotype.
These parents need to be homo-zygous, i.e., they need to have the same gene variant or allele, for the trait to be inherited.
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Answer:
True breeding parents can only pass one trait variant(s) to their offspring.
the answer is C.
Explanation:
Have a nice day! (did it on my test n got it correct)
During signal transduction in a rod cell, the sensory signal is amplified when:.
Answer:
it's amplified when there is results in hyperpolarization of the sensory cell.
Protostomes that have bilateral symmetry and three embryonic germ layers, but that do not possess a coelom or pseudocoelom, are called
Flatworms are free-living or parasitic animals, with bilateral symmetry, triblastic and with no coelom. The correct answer is FLATWORMS.
What are the flatworms?These are animals of variable size, going from a few millimeters to centimeters.
Flatworms are bilateral, acoelomated, and triblastic animals. The fact of being acoelomate means that they lack an internal cavity. Their whole body is solid, having mesenchyme where different organs are located.
Sense organs are located in the anterior part of the body.
These animals are hermaphrodites, exhibiting cross reproduction and eventually autofecundation.
They might be free-living animals or parasitic.
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Facilitated diffusion is a type of passive transport, which does not require energy.
What happens during facilitated diffusion?
Answer:
I believe is the correct answer
c
Explanation:
c
The Rec8 protein holds sister chromatids together during meiosis. If an individual has a mutation that prevents degradation of Rec8, this would most likely prevent
If an individual has a mutation that prevents degradation of Rec8, then this would most likely prevent correct segregation during meiosis II.
What is disjunction?In genetics, the term disjunction make reference to the separation of homo-logous chromosomes during meiosis.
Non-disjunction leads to the generation of unbalanced gametes with more chromosomes than normal.
Rec8 is a protein involved in the separation (disjunction) of the homo-logous chromosomes during cell division.
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If the strand of DNA with the sequence TTA mutated to TTG, would this be a silent or missense mutation? Hint: Find the RNA for both sequences and check to see that they code for different amino acids. (1 point)
it would be Missense mutation
the reason why is missense mutation is because the amino acids changed
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Answer:
Missense mutationmutation
Explanation:
