Answer:
The scientific method is a process for experimentation that is used to explore observations and answer questions. Does this mean all scientists follow exactly this process? No. Some areas of science can be more easily tested than others. For example, scientists studying how stars change as they age or how dinosaurs digested their food cannot fast-forward a star's life by a million years or run medical exams on feeding dinosaurs to test their hypotheses. When direct experimentation is not possible, scientists modify the scientific method. In fact, there are probably as many versions of the scientific method as there are scientists! But even when modified, the goal remains the same: to discover cause and effect relationships by asking questions, carefully gathering and examining the evidence, and seeing if all the available information can be combined into a logical answer.
Explanation:
Given the following three mRNA sequences, 2 code for the same protein. Which two?
#1. AGU UUA GCA ACG AGA UCA
#2 UCG CUA GCG ACC AGU UCA
#3 AGC CUC GCC ACU CGU AGU
Answer:
#2 & #3
Explanation:
both have the same amino acids. like leucine
Knowing that more than one codon codes for the same amino acid during protein building, we can affirm that sequences #2 and #3 code for the same protein.
How does translation occur?
During protein synthesis, the ribosome reads mRNA molecules from the 5' to 3' extremes.
While doing it, tRNA recognizes the codons of the molecules and adds the correct amino acids.
Codons are short sequences of three nucleotides that code for one amino acid.
So the sequence of codons determines the sequence of amino acids in the building protein.
There are 64 possible codons,
The start codon AUG is the most common sequence used by eukaryotic cells and placed near the 5' extreme of the molecule. The end codons are UAA, UAG, UGA. They indicate where to stop protein synthesis. The remaining codons code for one amino acid in the protein. Since there are only 20 amino acids in nature, more than one codon codes for the same amino acid.Knowing this, we can build the protein by reading the mRNA sequences.
#1. AGU UUA GCA ACG AGA UCA
Met Leu Ala Thr Arg Ser
#2 UCG CUA GCG ACC AGU UCA
Ser Leu Ala Thr Ser Ser
#3 AGC CUC GCC ACU CGU AGU
Ser Leu Ala Thr Arg Ser
Sequences 2 and 3 code for the same protein.
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The closest star to our solar system is the _____.
Alpha Centauri
Sun
Northern Star
Answer:
Explanation:
true and keep it up
Answer:
Alpha Centauri.
Explanation:
Hope it helps.
chlorella is single celled and photosynthetic organism true or false?
Answer:
false
Explanation:single cell of Chlorella is an independent life form. It is called a unicellular organism.
Which mechanism of evolution is caused by a population moving to a secluded mountain valley that is cut off from any other populations?
Natural selection
Mutations
Genetic drift
Gene flow
Which of the following is TRUE about prokaryotes?*
They can be multicellular
Their cells are larger than eukaryotic cells
Their cells lack a nucleus
They evolved after eukaryotic cells.
What would happen to a plant if many of its cells are plasmolysed?
Answer:
pressure decreases to the point where the protoplasm of the cell peels away from the cell wall, leaving gaps between the cell wall and the membrane and making the plant cell shrink and crumple.
How are humans and chickens related ???
Answer:
they both have feet but like humans
Answer:
Because we are both animals .
Explanation:
About 60 percent of chicken genes correspond to a similar human gene. However, researchers uncovered more small sequence differences between corresponding pairs of chicken and human genes, which are 75 percent identical on average, than between rodent and human gene pairs, which are 88 percent identical on average.
describe two major functions of roots. explain why these functions are important to the plant
Answer:
The root is a very important part of the plant that has two main functions: To hold the plant to the ground and to absorb water and mineral salts from the soil.
Explanation:
The root is the organ of the plant that is frequently located underground, since it presents positive geotropism. The roots penetrate several layers of the soil, bind the earth with their branches and adhere by means of absorbent hairs to the soil particles, fixing the plant and ensuring its stability, that is, they prevent it from being dragged by the wind, and provide the vegetable of a base for its correct growth. The root is the organ specialized in absorbing water and minerals (raw sap) from the soil, mainly through the absorbent hairs, and conducting it towards the stem. The water circulates through the stem until it reaches the leaves. Small tubes called capillaries are involved in this process.
Question 1
Which of these blood components is NOT involved in immune defenses against infection?
antibodies
complement
erythrocytes
leukocytes
what is the relationship between air temperature and moisture capacity?
Answer: As air temperature increases, air can hold more water molecules, and its relative humidity decreases. When temperatures drop, relative humidity increases.
How was Carlos Linnaeus important to evolutionary biology
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Swedish naturalist and explorer Carolus Linnaeus was the first to frame principles for defining natural genera and species of organisms and to create a uniform system for naming them, known as binomial nomenclature
In vampires, the ability to go outside during the day is recessive, while going out only at night is dominant. A female “day-dwelling” vampire marries a male heterozygous “night-dweller.” On scratch paper, use a Punnett square to determine the possible genotypes of their offspring. What is the genotypic ratio of their offspring?
Answer:
it be half and half
Explanation:
because the child will take 50% for the parents
Help please
Dkskskekdndkxien
Answer:
Yes,cloning should be acceptable because different types of extinct animals and plants can rejuvenated and also organisms with superior survival skills can be reproduced easily.
How do hormones affect gene activity?
Answer:
makes them more active.
Explanation:
Answer:
makes them more active.
Explanation:
Which level or organization would the endocrine fall under?
a.organ
b.system
c.cell
d.organism
Answer:
b
Explanation:
The endocrine falls under the system level of organization. It is called the endocrine system. So the correct option is B.
What is the endocrine system?The endocrine system is an organ system of the body. It is made of special organs called glands. The glands are responsible for the synthesis and secretion of hormones.
Hormones are called the chemical messengers of the body. They help in the coordination of almost all of the functions of the body. Some of the functions coordinated by the hormones are growth and development, mood and emotions, sleep, sexual functions, etc.
Hormones are specific for the function and carry it out by reaching the target cell. The level of hormones in the blood is monitored by the endocrine system.
The rise in the level of hormones is sensed by the pituitary gland near the brain which signals the gland to stop the production of the hormone.
Therefore, the endocrine system is an organ system and the correct option is B.
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Why do scientists believe the universe is still expanding?
a
The further away an object is, the higher the temperature and pressure eventually become, causing nuclear fusion
b
Distant objects shift in frequency toward red on the electromagnetic spectrum, which tells us objects are moving away from us
c
Spiral galaxies spin, so they appear to be a rotating disk of stars and dust
d
Distant objects shift in frequency toward blue on the electromagnetic spectrum, which tells us objects are closer to us us
Answer:
b
Explanation:
I looking at the electro magnetic spectrum I can tell scientists if things are moving toward the Earth or away from the Earth
Do sea horses reproduce asexually or sexually
Answer:
asexual reproduction
Explanation:
Animal Reproduction
In asexual reproduction, an individual can reproduce without involvement with another individual of that species. Sexual reproduction in seahorses: Female seahorses produce eggs for reproduction that are then fertilized by the male.
Sea horses reproduce sexually.
Is a sea horse asexually or sexually?Sea horses reproduce sexually by internal fertilisation. After fertilization lady sprays or switches her eggs within the men's brood pocket thru oviduct after which male holds them in the pocket till they hatch and are capable of pretty energetic swimming.
Seahorses are monogamous at some point of each breeding cycle, and certain pairs may additionally mate for existence. The mating dance can maintain for hours. The couple swims together, twining tails in a water ballet. A female has an ovipositor for depositing her eggs in a male's brood pouch.
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Temperature surrounding a victim's body that is colder than normal body temperature will
A. Have no effect on the rate of cooling
B. Decrease the rate of cooling
C. Speed up the rate of cooling
Suppose a child was born with growth hormone receptors that did not work properly. How do you think this would affect the child’s development?
Answer:
This would affect the child’s development poorly as they will not be able to grow like an average human causing many difficulties within their body
Briefly describe what is mutation
Answer:
Mutation is a cause or change in someone's gene. That person has either too many genes or is missing one.
Explanation:
Which process occurs only in autotrophs and never in heterotrophs?
A. protein synthesis
B. food digestion
C. cellular respiration
D. photosynthesis
Answer:
D
Explanation:
Most autotrophs make their "food" through photosynthesis using the energy of the sun. Heterotrophs cannot make their own food, so they must eat or absorb it.
The process that occurs only in autotrophs and never in heterotrophs is photosynthesis. The correct option is D.
What are autotrophs and heterotrophs?Autotrophs are organisms that produce their own food, which means they do not need to hunt or look for food, such as plants.
Heterotrophs are animals that are unable to produce their own nutrients, so they must rely on an external source of energy, which they obtain through hunting, scavenging, and other means.
Photosynthesis only occurs in autotrophs, as they produce their own food through this process. Most autotrophs obtain their "food" by using the energy of the sun via photosynthesis. Heterotrophs are unable to produce their own food, thus they must consume it or absorb it.
Therefore, the correct option is D. photosynthesis.
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In which environment would mineral formation caused by high pressures and high temperatures most likely occur?
a lava flow
deep within Earth
a cave
the ocean
Ultraviolet radiation can be felt as heat.
O True
O False
Answer:
its true.
Explanation:
have a nice day :)
Put the following organisms in an aquatic food chain in the order in which energy flows through them, explaining the reason for their placement.
small fish, mammal, phytoplankton, zooplankton
Explanation:
Phytoplankton, Zooplankton, Small Fish, Mammal
Phytoplanktons are the small photosynthetic organism that can produce their own feed and so are the producers in this food chain. Zooplanktons are small organisms incapable of producing their own food and eat phytoplanktons. Small fishes consume zooplanktons since due to their small size they are unable to eat bigger organisms. Mammals eat small fishes since they are omnivorer.
The correct order in which energy flows through organisms in an aquatic food chain is: Phytoplankton ⇒ Zooplankton ⇒ Small fishes ⇒ Mammals.
What is an aquatic food chain?The food chain in an aquatic habitat is an aquatic food chain. It often starts with the simple algae or phytoplankton as producers, followed by zooplankton which eats them. Giant fish, sharks, and whales, which consume zooplankton, that is eaten by small fishes and crustaceans. A water-based food chain is known as an aquatic food chain.
The energy flow in an aquatic food chain starts with the phytoplankton with maximum energy, eaten by zooplankton which are small organisms in water body, zooplanktons eaten up by the small fishes which are then eaten by large fishes or mammals.
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How are our red blood cells similar to a bus or taxi?
Answer:
Both erythrocytes and bus/taxi drivers' main job is to transport important components. Erythrocytes transport oxygen and carbon dioxide through the body. Likewise, taxi/bus drivers carry citizens through the city. Citizens are important to the city just as oxygen is important to the body. Taxi drivers move through, and reach all parts of the city; similar to how erythrocytes transport oxygen all throughout the body. In addition, there are great amounts of both Erythrocytes in the body and taxi/bus drivers in the city.
Mr.Goldsmith suggested that animals must capture energy from their environment. A example of this would be___
Answer:yes
Explanation:
Yes
Determine which embryo is a cow, horse, cat, and human. Thank you! (scroll down to see A,B,C,&D)
Answer:
a - horse
b - cow
c - cat
d - human
i think
Which of the following is NOT a true statement about the kidneys?
A) Blood leaves the kidneys through the ureter
B) The kidneys filter about 2,000 L of blood
C) The kidneys contain microscopic filters that clean the blood
D) A concentrated mixture of waste materials are collected in the kidneys of excretion
Which statement correctly describes the rock cycle?
a Igneous rock can only form by heat and pressure.
b Magma can only form by compaction and cementation
c Igneous rocks form from volcanoes
d Metamorphic rocks form by weathering, erosion and then deposition.
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Which statement is correct concerning hereditary information?(1) A chromosome is composed of many genes.(2) A gene is composed of many chromosomes.(3) Each chromosome carries the same information.(4) Each gene carries the same information.
Answer: (1) A chromosome is composed of many genes.
A gene is a sequence of DNA, which are instructions on how to make proteins for the cell. Proteins are then used as building blocks to make tissue or other essential things the body needs. Those proteins also determine things like a person's eye color. Each gene has a stop and end point. When you bundle a bunch of genes together, you form a group known as a chromosome. Each chromosome has a different role to play, so not all chromosomes carry the same information.
