Archive day

December 17, 2025

2,558 public questions were asked on this day.

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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
Which of these definitions have been paired with the correct type of cell? Blood cells are elongated cells that can contract. Neurons are cells that conduct electrical impulses. Epithelial cells are cells that carry oxyg...
Asked by CHRIS 1 answer
Cell differentiation depends on changes in expression.
Asked by CHRIS 1 answer
What role do red blood cells play in the human body? They protect against injury. They protect against disease-carrying microorganisms. They transport oxygen throughout the body. They aid in blood clotting.
Asked by CHRIS 1 answer
Which type of cell can duplicate indefinitely? stem cell blood cell muscle cell neuron
Asked by CHRIS 1 answer
What role do white blood cells perform in a human body? protect against pathogens conducting electrical impulses secreting enzymes carrying oxygen
Asked by CHRIS 1 answer
Scientists study salamanders and their ability to regenerate lost legs and tails. What additional information is essential for scientists to understand in order to apply this ability to humans who have lost limbs? how qu...
Asked by CHRIS 1 answer
Which is the end result of cytokinesis from a cell undergoing mitosis? one cell that has two identical copies of DNA one cell that has two different copies of DNA two cells that have two identical copies of DNA two cells...
Asked by CHRIS 1 answer
In which of these stages is mitosis most important? A tiger cub is born. A tiger cub learns to walk. A tiger cub begins to grow. A tiger cub play-fights.
Asked by CHRIS 1 answer
Centromeres split apart during
Asked by CHRIS 1 answer
Which statement accurately describes the relationship between cytokinesis and mitosis? Mitosis includes interphase and cytokinesis. Cytokinesis precedes mitosis in the cell cycle. Cytokinesis is not a phase of mitosis, b...
Asked by CHRIS 1 answer
After chromosomes are formed, during which phase of mitosis do the chromosomes attach to the spindle fibers by their centromeres? anaphase prophase metaphase telophase
Asked by CHRIS 1 answer
Which statement best describes cancer cells? They grow as a single layer of cells. They cease to reproduce after 20–50 mitotic divisions. They reproduce only when needed to replace missing cells. They are not regulated b...
Asked by CHRIS 1 answer
Explain the difference between gene flow and genetic drift.
Asked by Chuck Bass 1 answer