3:55 51 1. The sex of a population of turtles is determined by the temperature. If a heatwave came and stayed during the turtles hatching season, which case would best represent the percentage of male and female turtles? Explain. Case!
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- The pesticide DDT was widely used in the 1940s as a method of insect control. In the late 1950s the first DDT-resistant mosquitoes were discovered, and eventually DDT-resistant mosquitoes were found globally. When DDT is used now, the development of DDT resistance in mosquito populations occurs in months rather than years.Which of the following best explains the observations concerning DDT resistance in mosquitoes? * nd 2 school The proportion of DDT-resistant mosquitoes in a population remains constant due to the metabolic costs of DDT utilization DDT is a chemical signal that delays normal reproductive cycles in many mosquito populations. Natural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs. Competition for limited resources causes mosquitoes to migrate to geographical areas that have richer supplies of DDT. A population of 1.492 finches is introduced to a rainforest. Over the next year, the finches showa death rate of…gle Chrome om/mod/quiz/attempt.php?attempt=17129308cmid%-837776 NG SYSTEM (ACADEMIC) In a sponge, reproduction is: CO a. Individuals have both male and female reproductive systems. O b. Individuals either have a male or a female reproductive system. C. Some individuals have only sexual reproduction, while others are entirely asexual. O d. Reproduction is entirely asexual by budding. O e. Individuals have nor reproductive organs, but produce both male and female gametes.How Big Should Each Offspring Be? Can you please use examples for the reading,
- Sea turtles exhibit temperature-dependent sex determination, meaning that ambient temperatures control whether or not a developing turtle embryo will become male or female. The data table reflects the numbers of turtle offspring counted in Year 1 and Year 2 of a study. Male Female Year 1 180 20 Year 2 164 33 What type of test can scientists use to assess whether or not the ratio of male to female sea turtles is dependent upon the year? O ANOVA O Chi-square contingency O 2-sample t test O Chi-square goodness of fitplease give answer asap.12 13 14 15 16 17 18 19 20 QUESTION 9 Under what circumstances does a one male polygynous group become a multi-male polygynous group? O 1. When neigborhing polyandric groups threaten the male's masculinity O 2. When females enter Estrus at the same time O 3. When the group's population of females and children gets too large for one male to defend by himself O 4. When primates are put in semi-free ranging environments O 5. When females born in the group move out of the group due to philopatric structures QUESTION 10 True or false: In monogamous groups the males and females may have more than one mating partner O 1. False O2. True Click Save and Submit to save and submit. Click Save All Answers to save all answers. hp f9 f8 f6 10 t7 1- 1O 米 %24 4 & 7 8 6. CO 近 %23
- Why are polyandrous mating systems more rare than polygynous matings? Only males are capable of multiple rounds of reproduction within a single breeding season Only females care for the young Females usually experience more intrasexual selection pressure than males Females usually devote more energy to offspring production and development.Discuss Concepts Many city-dwellers have noted that the density of cockroaches in apartment kitchens appears to vary with the habits of the occupants: people who wrap food carefully and clean their kitchen frequently tend to have fewer arthropod roommates than those who leave food on kitchen counters and clean less often. Interpret these observations from the viewpoint of a population ecologist.what is the per capita birth rate of the bedbug po
- 8. Define "eusociality". Explain, in genetic terms, why eusociality is especially prevalent in ants. Give an example of division of labor among ants. Name two invertebrate groups other than the Hymenoptera which include eusocial species.0 Why is the maintenance of homeostasis. especially important during development of new humans within the bodies of their mothers?The following pattern of mortality was observed in a fictitious mammal. Of the newborn females, half survived for 1 year, 10% survived for 2 years, 3.75% survived for 3 years, 1.5% survived for 4 years, and none survived for 5 years. Breeding occurred once a year, and immediately following the breeding season the age-specific reproductive rates were determined from the fresh placental scars of females of known age. One-year-old females had an average of 2.8 placental scars per female, 2-year-old females had an average of 4.0 placental scars per female, and older females had an average of 4.8 placental scars per female. There was a 50:50 sex ratio at birth. A. Calculate the values of re and rm for this population. B. Determine the transition or Leslie matrix for this population. C. Suppose a population with an excess of males was started with ten 1-year-old females and 20 2-year-old females just prior to breeding. Calculate the number of females in each age class over the next 3 years.