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Home Question Bank Biology Archive 2024 November 24

Biology Questions from Nov 24,2024

Browse the Biology Q&A Archive for Nov 24,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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4. Ejercicio 4: Retrocruce Una planta de semillas amarillas heterocigota (Aa) se cruza con una planta de semillas verdes (aa): a) ¿Cuáles serán las proporciones genotípicas y fenotípicas de la descendencia? b) ¿Qué indica este tipo de cruce sobre el alelo dominante? 3. Ejercicio 3: Cruce Dihíbrido (Ley de la Independencia de los Caracteres) En las plantas de arvejas, el color amarillo de las semillas (A) es dominante sobre el verde (a), y la textura lisa (B) es dominante sobre la rugosa (b). Si se cruzan dos plantas heterocigotas para ambos caracteres (AaBb x AaBb): a) Realiza el cuadro de Punnett para este cruce dihíbrido. b) Determina las proporciones fenotípicas esperadas. Which factor causes the rate of an enzyme-catalyzed reaction to level off after initially increasing? substrate absorption temperature decrease products accumulating pH level fluctuations Mimicry can occur when one species of non-toxic insect (mimic) evolves to look like a toxic insect (model) and thus is avoided by predators due to the resemblance. Such an interaction would be: Favorable for both the model and mimic Favorable for the model but unfavorable for the mimic Unfavorable for both the model and mimic Favorable for the mimic but unfavorable for the model A scientist is studying the transmission of the West Nile Virus by mosquitoes to humans. This would be considered an ecological study. True False Which of the following is NOT an abiotic factor that would directly affect terrestrial organisms? Precipitation Temperature Wave action Soil pH When two species of squirrels both attempt to collect as many of a limited supply of acorns as possible, this interaction between them would be considered: Parasitism Competition Predation Mutualism When bees feed on flower nectar, get dusted with pollen, and then carry that pollen to another plant flower of the same species, this interaction would be considered: Competition Mutualism Parasitism Predation 5,5 litres de sang contiennent environ \( 2,025 \times 10^{13} \) globules rouges. Combien y a-t-il de globules rouges dans 900 mL de sang prélevés au cours d'un don de sang? Ta réponse: Dans 900 mL de sang, il y a environ \( \ldots . . \times 10 \cdots \) globules rouges. The post-lunch dip is the drop in mental alertness after a midday meal. Does an extract of the leaves of the ginkgo tree reduce the post-lunch dip? Assign healthy people aged 18 to 40 years to take either ginkgo extract or a placebo pill. After lunch, ask them to read seven pages of random letters and place an \( X \) over every \( e \). Count the number of misses per line read.
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