7) A life history pattern is a set of adaptations that influence the individual's a) longevity b) fertility c) age at reproductive maturity d) all of the above
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- 1. DAY 1 (Gestational)- stage:____________ event:_________________________2. DAY 8 (Fertilization)- stage:____________ event:_________________________3. DAY 14 (Gestational)- stage:____________ event:________________________4. DAY 6 ( Gestational)- stage:____________ event:________________________5. DAY 2 ( Fertilization)- stage:____________ event:__________________________6. DAY 3 ( Gestational)- stage:____________ event:___________________________7. DAY 12 ( Fertilization)- stage:____________ event:___________________________8. DAY 11 ( Gestational)- stage:____________ event:___________________________9. DAY 5 ( Gestational)- stage:____________ event:___________________________10. DAY 6 ( Fertilization)- stage:____________ event:_______________Based on this study of Aurelia aurita, how could you define the concept of lifecycle?What factors affect birth rates and death rates worldwide?
- In the list of animals given below, hen is the odd one out.Human being, cow, dog, henThe reason for this is: (a) it undergoes internal fertilisation. (b) it is oviparous. (c) it is viviparous. (d) it undergoes external fertilisation.In human beings, the correct sequence of events during reproduction is: (a) gamete formation, fertilisation, zygote, embryo (b) embryo, zygote, fertilisation, gamete formation (c) fertilisation, gamete formation, embryo, zygote (d) gamete formation, fertilisation, embryo, zygoteWhich of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.
- C. Why do sea urchins have external fertilization? D. Then why don't the parents take care of the young? E. Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?A baby born four weeks before its due date is most likely to have anunderdevelopeda. central nervous system.b. heart.c. reproductive system.d. All of the above are correct.Which of the following characterizesparthenogenesis?(A) An individual may change its sex during itslifetime.(B) Specialized groups of cells grow into newindividuals.(C) An organism is first a male and then a female.(D) An egg develops without being fertilized.
- During embryonic development, unique cell layers develop into specific groups of tissues or organs during a stage called ________. a. the blastula stage b. the germ layer stage c. the gastrula stage d. the organogenesis stageWhat are some more evidence that would support the anwser?How can a single child born in the United States have a greater effect on the environment and natural resources than a dozen children born in Kenya?