Answer:
In everyday language a theory means a hunch or speculation. Not so in science. In science, the word theory refers to a comprehensive explanation of an important feature of nature supported by facts gathered over time. Theories also allow scientists to make predictions about as yet unobserved phenomena".
Explanation:
Olivia was reading about the Earth's history. She grew interested in the Quaternary period in the Cenozoic era and studied it further. The Quaternary
period is best known for which two major events?
A. the rise of reptiles and flowering plants
O
B. the rise of mammals and swimming mammals
O
c. the ice ages and the rise of humans
O
D. the rise of dinosaurs and other reptiles
Answer:
oh yeah daddy
mink ,
Explanation:
Answer:
B
Explanation:
The Cenozoic era was known to be called the age of mammals, because the largest land animals have been mammals during that time. Meaning Mammals that swim would also be living during that time with land mammals.
which is true regarding the process of meiosis I?
A) chromosome Number is reduced from diploid to haploid
B) sister chromatids in a cell undergoing are always identical
C) Most homologue pairs do not have any crossovers during prophase I
D) sister chromatids separate to opposite ends of the cell
Answer: The correct option is A (chromosome Number is reduced from diploid to haploid)
Explanation:
In sexual reproduction, offspring are produced by fusion of two different sex cells which usually come from two different parents. These sex cells are know as gametes.
Meiosis is a type of cell division that gives rise to gametes in which the chromosome number is halved. Thus, the gamete cell is said to contain a haploid number (n) of chromosomes.
A diploid cell has two sets of chromosomes: one from the male parent and the other from the female parent. When a diploid cell undergoes meiosis the following occurs:
--> the chromosomes replicate once and
--> the nucleus and cell duplicate ( divide equally) twice.
As a result, the diploid parent cell gives rise to four haploid gamete cells. Therefore the statement "chromosome Number is reduced from diploid to haploid ' is true concerning meiosis I.
What role do glucose and oxygen play in cellular respiration?
They are reactants because they are present before the reaction.
They are reactants because they are present after the reaction.
They are products because they are present before the reaction.
They are products because they are present after the reaction.
Answer:
They are reactants because they are present before the reaction
Which of the following is the passive transport process by which large molecules move across the cell membrane with the help of a protein channel?
A. facilitated diffusion
B. osmosis
C. simple diffusion
D. endocytosis
Do the same DNA sequences always lead to the same traits? Why or why not? I
The "ribopart in the name deoxyribonucleic acid refers to the a. Rungs of the spiral ladder b. Bonds that hold two strands together C. Sugar component of DNA d. Type of helical arrangement
Carbon has an atomic number of 6. Based on this evidence, what can you claim about
carbon?
the number of protons in a carbon atom
the average atomic mass of a carbon atom
the group number of carbon
the period number of carbon
Which of the following is NOT evidence to support evolution?
A.Fossils
B.DNA and protein similarities
C.Embryo similarities
D.Mutations
adrenocorticotropic hormone
Explanation:
adrenocorticotropic hormone= It stimulates the adrenal cortex.
How are the sensory receptors for hearing and touch similar?
Answer: salah it is good for ur breath.
Explanation:
The sensory receptors for hearing and touching are similar because the sensory receptors take the message from that sensory area, and most of the stimulus is vibration.
What are sensory receptors?The receptor is present on the cell surface, and the sensory receptor is present on sensory areas such as the skin, ear, and so on, and most of the time the stimulus is carried out by the sensory neuron to the brain or spinal cord. The sensory receptor takes the stimulus, and later, in the spinal cord or in the brain, it is further programmed and the action is generated. The action is generated by the sensory stimulus, and then, with the help of the motor neuron, the action is seen.
Hence, the sensory receptors for hearing and touching are similar because the sensory receptors take the message from that area, and most of the stimulus is vibration.
Learn more about the sensory receptors here.
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what does a heterotroph mean?
Answer:
An animal that cannot make its own food.
Explanation:
A heterotroph is an animal or life source that cannot make its own food, so it depends on others things, such as plants or other animals. These types of listings can be as followed :
Carnivores
Herbivores
Omnivores
Movement of the particles across the membrane stops when the concentration gradient no longer exists, the particles will continue to diffuse due to random motion
Answer:
Once the concentration gradient no longer exists, particles will continue to diffuse due to random motion.
Explanation:
When there is a permeable membrane between two solutions with different concentrations, the concentration gradient will go from the compartment with more particles to the one with fewer particles to valance the concentrations on both sides of the membrane. Once the concentrations are equal, particles will still randomly move from one side to the other, but the number of particles that move to one side is almost the same as the number of particles that move to the other, so there is still valance and the same concentration in both sides.
what are some moons with ice and rocks?
Answer:
There are only two large rocky moons in the Solar System: the Earth's Moon and Io. The other moons have interiors with a varying ratio of ice : rock, and have surfaces that are made almost entirely of ice.
Explanation:
The total amount of all energy in the universe is...
O slightly increasing
O slightly decreasing
O always the same
O always zero
Answer:
Always the same
Explanation:
The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. ... In other words, energy cannot be created or destroyed.
Why is biomass at the second trophic level in most ecosystems not as great as biomass at the first trophic
level?
Magnetic storms are the result of which of the following?
A) a solar prominence
B) an increased number of solar wind particles
C) constant solar wind
D) 10-to 11-year cycling of sunspots
Answer:
Answer: The answer is B, an increased number of solar wind particles. and I don't care if I get brainiest
PLS HELP, DUE IN 30 MINUTES :( I GIVE BRAINLIEST
Look at Scenario A below and select the correct Punnett Square that corresponds with the scenario. For all questions, the trait being studied is seed color - red seeds (R, dominant) and pink seeds (r, recessive). Scenario A: Parent 1: heterozygous Parent 2: pink
Answer: A
Explanation:
Heterozygous means it has both a recessive and a dominate allele so in this case it’d be shown as Rr. For a parent to appear pink, the genotype must be rr (because r is recessive and won’t show up in the parent if there’s a dominant allele to over lower it). The only option that shows an Rr and rr pairing is option A
A. How do tropical rainforest ecosystems differ from other forest ecosystems?
They have less biodiversity and less light that reaches the forest floor than other forest ecosystems.
B. They receive more rainfall and have warmer average temperatures than other forest ecosystems.
C. They have warmer average summers and milder average winters than other forest ecosystems.
D. They have more limited areas along coastal areas than other forest ecosystems.
Answer:
C
Explanation:
Answer:
C
Explanation:
They have warmer average summers and milder average winters than other forest ecosystems.
.
When a volcano erupts and spews lava from under Earth's surface, people and animals must evacuate the area. The lava pours into a nearby bay, preventing people from using the water, and particles of ash rise high into the air. Which spheres of the Earth would be affected by this volcanic eruption?
Answer:
I don't know sorry
Explanation:
Name the hormone released when the blood glucose concentration is too low
Explanation:
Glucagon
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Answer:
Glucagon is released to stop blood sugar levels dropping too low (hypoglycaemia), while insulin is released to stop blood sugar levels rising too high (hyperglycaemia). The release of glucagon is stimulated by low blood glucose, protein-rich meals and adrenaline (another important hormone for combating low glucose).
Explanation:
hope this help
..mark as a brainlestHELP PLEASE WILL GIVE BRAINLIEST
1)What would be some of the advantages of using biological materials to create batteries?
2)What are some of the natural materials Belcher thinks of using?
Answer:
1. you can start from pure vs having to purify which is very energy and cost intensive
you can avoid a lot of mining and the damage and cost that that brings, supplies are more available (inorganic can be exhausted a lot sooner)
the hope is that this will be the efficiency bump that will make renewables work
2. Her and her lab are using viruses to form carbon nanotubes into batteries and solar cells
It is quite cool
Explanation:
Which term best describes any organism that lives on or in another living organism and takes nutrients from that organism without killing it? A. virus B. bacterium C. parasite D. fungus
Answer:
C
Explanation:
Directions: Identify the kind of relationship shown in the following
Learning Task No.1DO YOU KNOW ME? help pls
Answer:
Food chains?
Explanation:
Predator and preys
Answer:
1. Predation 2. Parasitic 3. Competition 4. Symbiosis 5. Mutualism
Explanation:
Predation- Predator hunting prey Ex: lions hunting gazelle
Parasitic- One organism benefits while the other is harmed Ex: Lice eating Hair
Competition- Organisms fighting over reasources Ex: Hippos fighting for space
Symbiosis- Two unalike organisms form a bond where they both benefit Ex: Birds eating ticks off buffalo.
Mutualism- Two organisms benefit from each other Ex: whale shark getting cleaned by remora fish which get a meal.
If the white eye gene is located on drosophila’s X chromosome,( )could have white eyes in the offspring
A: both male and female
B: only male
C: only female
D: neither male nor female
The red line represents the actual bear population, while the blue line shows the predicted population. Why doesn't the actual bear population ever match the exact carrying capacity?
Answer:
Explanation:
Predicted populations are ideal circumstances and do not account for many of the external factors that can affect the data in the current study. Therefore, many times the actual population is either lower than the population or exceeds it but is almost never exact. This can be due to weather conditions that cause a large portion of the population to die out, excess food, hunters, etc. Many factors can drastically affect whether the population is dying or thriving.
help me because I mean you should cuz it's a nice thing to do
Answer:
the answer is C
Explanation:
Mutations are genetic changes in the DNA sequence of the genome in a particular organism. Mutations are caused by adding one or more extra nucleotides into the DNA (i.e. insertions), deleting nucleotides (i.e. deletions), or replacing nucleotides (i.e., substitutions). Due to the diverse nature of mutations, it is expected that they have different effects on the gene product (i.e., the resulting protein). For example, a deletion or an insertion, which are collectively are referred to as 'indels' mutations, may generate frameshift mutations that shift the way the DNA sequence is read. Moreover, if a nucleotide letter is written backward, it doesn't change the final product (i.e., the nucleotide sequence), which is represented in the example with the C option.
Answer and i will give brainly
Heat transfer between two objects will continue until both objects reach the same ???
O volume
O temperature
O mass
O pressure
If 30% of a DNA sample is composed of thymine nucleotides, what percentage of the DNA sample would be composed of cytosine nucleotides?
Answer:
20%
Explanation:
Pairing do occur between a purine and a pyrimidine base or a pyrimidine and a purine base where Adenine pairs with Thymine and Guanine pairs with Cytosine.
DNA(deoxyribonucliec acid) sample is usually compose of 100% nucleotide base,
Since 30% of the sample section is compose of thymine then Adenine the base pair will also be 30% this is because adenine will always pair with thymine and each will occur in equal quantity. Together, adenine and thymine compose 60% of the segment.
While the remaining 40% of the section is composed of guanine and cytosine pairs and since the two bases will be equal in quantity, 20% of the DNA section will be cytosine nucleotide.
Explain how you get energy indirectly from the sun.