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December 2025

42,840 public questions were asked this month.

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Recent questions

Latest from December 2025

Which specific process in the light-dependent reactions produces oxygen and hydrogen ions? the formation of NADPH the production of ATP the splitting of water the excitation of electrons in photosytem I
Asked by CHRIS 1 answer
Which statement correctly compares and contrasts the three stages of cellular respiration that occur in the presence of oxygen? Each stage occurs in the mitochondria, but only the final stage produces ATP. Each stage pro...
Asked by CHRIS 1 answer
During which step of cellular respiration is the most ATP produced? Krebs cycle glycolysis photosynthesis electron transport chain
Asked by CHRIS 1 answer
Stella wants to test the hypothesis “If carbon dioxide levels increase, the growth rate of sunflowers will increase.” She places five young sunflower plants into similar containers and sets up pumps that release differen...
Asked by CHRIS 1 answer
Which events take place in the light-dependent reactions of photosynthesis? Light energy is converted to sugars; sugars are broken down for energy. Light energy is captured by plants; light energy is used to make sugar....
Asked by CHRIS 1 answer
Which type of cells are the least limited in differentiation? adult stem cells embryonic stem cells amniotic fluid stem cells somatic stem cells
Asked by CHRIS 1 answer
Normally, a certain gene produces a short protein with the amino acid sequence methionine-lysine-serine-tyrosine. After experiencing a mutation, the gene now produces a protein with the amino acid sequence methionine-lys...
Asked by Chuck Bass 1 answer
Which best describes meiosis? It produces cells that are identical to the original cell. It is responsible for the replacement of damaged skin cells. It is responsible for growth of the organism. It produces male and fem...
Asked by CHRIS 1 answer
During which phase of meiosis does crossing over of chromosomes occur? prophase I metaphase I anaphase I telophase I
Asked by CHRIS 1 answer
The diagram illustrates one method of genetic recombination. A paternal and maternal gene cross-over. Which method of genetic recombination is illustrated in the diagram? crossing over independent assortment fertilizatio...
Asked by CHRIS 1 answer
Why is it necessary to use restriction enzymes before sequencing a DNA molecule?
Asked by Chuck Bass 1 answer
Which is a homologous chromosome pair? chromatid zygote gamete tetrad
Asked by CHRIS 1 answer
Why is meiosis important for organisms? It allows for genetic variation among organisms. It determines which genes are dominant and which are recessive. It produces genetically identical cells. It provides a means of ase...
Asked by CHRIS 1 answer
In his study of pea plants, Gregor Mendel used which method to produce offspring? cross-pollination, by using parents that had identical traits cross-pollination, by using parents that had different traits self-pollinati...
Asked by CHRIS 1 answer
Why is it sometimes necessary to use polymerase chain reactions to create copies of DNA fragments?
Asked by Chuck Bass 1 answer
Which three processes are methods of genetic recombination? natural selection, crossing over, and independent assortment crossing over, independent assortment, and fertilization independent assortment, fertilization, and...
Asked by CHRIS 1 answer
What is the midpoint of the line segment with the endpoints J(–9, –4) and K(7, 8)? (–5, –1) (–2, 1) (–1, 2) (3, 5)
Asked by doodle bob 1 answer
Which elements describe seventeenth-century French settlements on the North American continent? Characteristic of French Settlements in North America Drag appropriate answer(s) here Not a Characteristic of French Settlem...
Asked by l 1 answer
How many chromosomes does a child inherit from his or her parents? 23 from the mother and 23 from the father 46 from the mother 46 from the father 46 from the mother and 46 from the father
Asked by CHRIS 1 answer
Which discovery did Gregor Mendel make? Traits are inherited independently of each other. Traits are inherited as a tetrad. Traits are inherited as homologous pairs. Traits are inherited as a set, from one parent.
Asked by CHRIS 1 answer
Which best illustrates how Gregor Mendel used creativity that lead to scientific discovery? He noticed that traits were passed on from parents to offspring. He chose a parent generation and carefully studied its traits....
Asked by CHRIS 1 answer
Which process makes it possible for all the major organs of the body to be formed by week 10 of human development? growth fertilization self-renewal differentiation
Asked by CHRIS 1 answer
Which type of gene is most likely to be widely expressed in the body of someone who has a superficial scrape? the gene that controls the production of stem cells the gene that controls the production of skin cells the ge...
Asked by CHRIS 1 answer
Which are sources of adult stem cells? Select three options. bone marrow amniotic fluid brain gametes liver embryo
Asked by CHRIS 1 answer
Which best compares self-renewal and differentiation? Both are processes that are the result of stem cell division. Both create more of the same types of cells. Both form specialized cells. Both depend on gene expression...
Asked by CHRIS 1 answer