Biología
Biología celular, genética, ecología y fundamentos de ciencias de la vida.
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why does meiosis create haploid cells? haploid cells have half the usua…
Haploid cells have half the usual number of chromosomes, so when two haploid cells are combined, they create the full amount of chromosomes.
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how many times does dna divide during mitosis? once twice three times n…
Once
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what is a mutation? an error that occurs when dna is copied the phase o…
An error that occurs when DNA is copied.
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why is meiosis important? all of these are correct. meiosis contributes…
A. All of these are correct.
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what is mitosis? - when chromosomes fail to separate properly during me…
The phase of the cell cycle where a cell actively divides into two identical cells.
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what does haploid mean? a cell has one set of chromosomes, or half the …
A. A cell has one set of chromosomes, or half the usual amount.
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7. choose the best answer. which of these is a form of fitness training…
B. high - intensity interval training ### Question 8
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3. choose the best answer. which of these is a fitness method that invo…
D. circuit training ### Question 4
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activity and recovery time. this is a fitness method that involves alte…
Interval Training
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3) match the fitness methods to the examples. methods will be used more…
functional fitness training (FFT) ### Second Blank (Fitness Training with Alternate Intensity/Recovery Intervals)
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in a cell that is undergoing mitosis, what happens to the chromosomes a…
They line up at the equator of the cell.
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which statement about aerobic respiration is true? atp and glucose are …
Oxygen is used while water and carbon dioxide are released.
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read the passage to answer the question. even though scorpions are rela…
Oxygen is used, and ATP is made.
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read the passage to answer the question. even though scorpions are rela…
There are twice as many chromosomes in somatic as in her egg cells.
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read the passage to answer the question. even though scorpions are rela…
tissue
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read the passage to answer the question. even though scorpions are rela…
cell differentiation
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read the passage to answer the question. even though scorpions are rela…
Cell nuclei are copied during mitosis.
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which phrase correctly defines a gene? a segment of dna a segment of fa…
a segment of DNA
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5) choose the best answer. sometimes when we focus too much on any one …
A. sacrificing needed time in other important categories ### Question 6
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what would a physician say is the most likely reason for less body effi…
D. a decrease in mitochondrial activity
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what happens to the levels of ghrelin and leptin hormones as you age an…
Ghrelin decreases and leptin increases.
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final exam review homework #1 - due monday you are doing an experiment.…
Plant #1 increased in mass due to photosynthesis. The source of mass is carbon dioxide (from air) and water (from soil), which are used in photosynthesis (powered by sunlight from…
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what is one way that a frameshift mutation could occur? (1 point) two n…
B. two nucleotides are deleted
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examine the two strands of dna below. which kind of mutation occurred? …
D. substitution
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which evidence best supports the claim that mutations are a source of i…
D. Mutations affect protein synthesis which impacts the way traits are expressed.
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question 10 1 pts some scientists believe that the brain has ____ neuro…
mirror
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name date: block: mrna codon practice level 2 instructions: use the mrn…
s: 1. Methionine 2. Lysine 3. Threonine 4. Isoleucine (assuming ATA, if A1A is typo) 5. Proline 6. Phenylalanine 7. Lysine 8. Proline 9. Isoleucine 10. Serine (Note: For question …
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question 4 1 pts we have specialized receptors for detecting sweet, sal…
D. bitter, toxic
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question 3 the snail - shaped tube in the inner ear, where sound waves …
A. cochlea
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date: 12-4-2025 period: 6th protein synthesis worksheet background info…
The subfield is Biology (under Natural Science).
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date: 12-4-2025 period: 6th protein synthesis worksheet background info…
The discipline is Natural Science, subfield Biology.
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the image on the left shows a normal red blood cell, and the image on t…
The water molecules move by osmosis into the cell from high water concentration to low water concentration. (The third option in the list)
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which statement describes the movement of water when a cell swells and …
Water went into the cell because the concentration of water inside the cell was lower than the concentration outside the cell.
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c. show the cross of a white-eyed female (x^rx^r) with a red-eyed male …
c. Punnett square as above. d. 50%
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the image shows particles of salt dissolved in water. how will the arra…
Salt particles will move toward the left through diffusion.
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8. in fruit flies, eye color is a sex - linked trait. red is dominant t…
white - eyed, male: $X^{r}Y$ white - eyed, female: $X^{r}X^{r}$ red - eyed, female (heterozygous): $X^{R}X^{r}$ red - eyed, male: $X^{R}Y$
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7. in humans, hemophilia is a sex - linked trait. females can be normal…
a. 50% b. 50%
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6. x - linked hypophosphatemia is an inherited form of rickets, a condi…
50
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5. a woman whose father was color blind marries a man who is color blin…
a. 50% b. 50%
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describing pumps why do pumps require energy? pumps move substances fro…
Pumps move substances from areas of low concentration to areas of high concentration.
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comparing the calcium and sodium-potassium pumps which statement descri…
Both pumps use proteins to transport substances across the cell membrane.
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5. a woman whose father was color blind marries a man who is color blin…
The chances that their offspring will be color blind is 50% (or \(\frac{1}{2}\)).
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analyzing pumps outside of cell inside of cell the diagram shows a pump…
X: sodium, Y: potassium
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describing the sodium-potassium pump complete the statement to describe…
potassium; sodium
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maintaining a certain calcium concentration is important for the proper…
nerve cells, muscle cells
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in the late devonian era, the seas began to recede and the land became …
C. natural selection
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which of the following does not contain structures homologous to the hu…
dragonfly wing
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4. cross a mother and father who are both type \ab.\ what is the probab…
The probability is \( \frac{1}{4} \) (or 25%).
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question 3 of 9 the fossil record indicates that the earliest known anc…
D. Offspring with genetic mutations resulting in fewer toes were more likely to survive and reproduce.
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question 2 of 9 which ancestor of the modern-day horse is also the clos…
D. Miohippus
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3. cross a father, who has type \o\ blood with a mother, who has type \…
The probability is \( 0 \) (or \( 0\% \)).
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chimpanzees exhibit 99% genetic similarity to humans. cows share approx…
The common ancestor of chimpanzees and humans lived more recently than the common ancestor of cows, chimpanzees, and humans.
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researchers often use mice to evaluate potential medications for treati…
Mice and humans have very different biochemistries.
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chimpanzees exhibit 99% genetic similarity to humans. cows share approx…
The common ancestor of chimpanzees and humans lived more recently than the common ancestor of cows, chimpanzees, and humans.
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researchers often use mice to evaluate potential medications for treati…
Mice and humans have very different biochemistries.
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in the late devonian era, the seas began to recede and the land became …
natural selection
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which of the following does not contain structures homologous to the hu…
dragonfly wing
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the fossil record indicates that the earliest known ancestor of horses …
Offspring with genetic mutations resulting in fewer toes were more likely to survive and reproduce.
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which ancestor of the modern-day horse is also the closest common ances…
Miohippus
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some portions of dna function as a kind of evolutionary clock when comp…
mutations accumulate at a known rate.
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question 15 of 20 which sequence places tiktaalik in the correct evolut…
lobe-finned fish, Tiktaalik, tetrapods
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question 13 of 20 which are members of the tetrapod clade? salmon whale…
whales, hawks
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a transitional fossil should ______. ○ share some similarity with speci…
share some similarity with species that lived before it and some similarity with species that lived after it.
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question 10 of 20 a vestigial structure is ○ a physical structure that …
D. a previously beneficial structure that no longer serves an adaptive purpose
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question 9 of 20 how do these structures provide evidence for common an…
While each forearm is used for a different purpose, they contain modified versions of the same bones.
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question 8 of 20 complete the sentence. homologous structures are ○ sma…
similar structures which share a common ancestry, despite their differences in function.
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question 8 of 20 complete the sentence. homologous structures are small…
similar structures which share a common ancestry, despite their differences in function.
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how do scientists use fossils to draw conclusions about the evolution o…
D. Fossils can be dated, providing a timeline for when certain types of life existed on Earth.
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fossils can be dated using which of the following? select all that appl…
relative to other fossils found in layers of rock, a method called radiometric dating, by dating the rock in which they are discovered, by dating the rock layers directly above an…
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question 3 of 20 which descriptions are examples of fossils? bones of a…
bones of a saber-toothed cat preserved in rock, burrows of prehistoric clams filled in with ancient mud, imprint of a fern left in ancient sandstone
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factors that are used by scientists to understand evolution include whi…
fossil record, molecular data, developmental homology
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question 1 of 20 what word or phrase did charles darwin use to describe…
descent with modification
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species x has a gene a that has this as part of its sequence: atgctgcct…
D. Species D: ATTCTGCCCTAGC
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using the diagram, how would you expect a jellyfish buried by a volcani…
Fossilization would not occur because jellyfish do not have bony skeletons or hard shells.
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using the diagram (top panel), what is the percentage similarity betwee…
93.3%
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a transitional fossil is important because it provides information abou…
how a group of organisms evolved from one form to another
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a transitional fossil is important because it provides information abou…
how a group of organisms evolved from one form to another
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using the diagram, which animal presented is the most distant relative …
pufferfish
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the giant panda has six digits on its \hands.\ one of these is a \thumb…
5
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which ability is not important in tiktaalik performing \pushups\? turn …
turn its head independently of its body
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if the ancestor of horses encountered an environment that selected them…
no
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two organisms have inherited the same gene from a common ancestor. this…
the gene has undergone mutations over generations in each group of organisms
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which creature does not represent a transitional fossil? balaena mystic…
Balaena mysticetus
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a deep lake has a variety of conditions. near the shore, the lake is sh…
E. in the deepest part of the lake
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the genetic code is universal in all living organisms because it ______…
B. was used by an ancient ancestor of all living organisms
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the ancestor of tiktaalik had limbs that resembled ______. fins wings h…
A. fins
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compared to modern-day horses, ancestral horses had ______. more toes f…
A. more toes
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a homologous structure is one that ______. has the same function in dif…
C. was inherited from a common ancestor
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score: 15/450 the devonian period has been called the age of ______. ma…
E. fishes
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an animal with a bony or cartilaginous backbone is a ______. ○ paleonto…
vertebrate
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2. explain how homeostasis is maintained in a cell and within an organi…
1. B. oxigen 2. C. active transport 3. No hay una respuesta correcta en las opciones dadas según biología (pero si se sigue un enfoque erróneo de la pregunta, no se puede determin…
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7. complete the central dogma: dna → rna → protein → ______
DNA → RNA → Protein → Function (or cellular processes where the protein acts)
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current attempt in progress the pressure of a monatomic ideal gas is do…
1 (corresponding to the option "1")
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to answer this question, first click here to view the associated video.…
Increases by a factor of \( \sqrt{2} \) (the last option among the first question's choices). ### Second Question (Internal Energy of Monatomic Ideal Gas)
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isabella is studying two populations of butterflies that live on opposi…
The population of butterflies north of the lake breed in early spring, whereas the population south of the lake breeds in late summer. For sperm transfer in mating, the clasping o…
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in the galapagos islands, which of the following would have prevented t…
frequent migration of finches between the islands
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multiple choice 4 points for most of american history, those most in ne…
Local government programs
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a gene in a randomly - mating population has two alleles (a, a), and 1 …
B. 0.095
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a gene in a randomly-mating population has two alleles (a,a), and the a…
0.1225
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which of the following is an example of gene flow? ○ the introduction o…
the carriage of seeds between two separate urban forests by wildlife such as squirrels and rats that travel back and forth between the two