Discuss the trade-offs associated with the following life history traits: a. Metamorphosis b. Body size c. Diapause d. Samelparity / Iteroparity e. Age at sexual maturity
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Discuss the trade-offs associated with the following life history traits:
a. Metamorphosis
b. Body size
c. Diapause
d. Samelparity / Iteroparity
e. Age at sexual maturity
Step by step
Solved in 4 steps
- give one species that is classified or exhibit the following: male to male combat show a photograph of it with its sexual traits (body stuctures, behavior, etc) and how these traits help their reproduction. explainDefine senescence. How would you measure senescence? compare andcontrast the two basic theories on why senescence persists. For each, include assumptions,predictions, data and conclusions. What evidence/conclusions can be applied from the casestudy in life-history evolution on Virginia Opossums?Which of the following statements is TRUE? A. Animals with indirect development requires external fertilization and an aquatic environment B. Protandry refers to species that begins life as male but later on transforms into females C. Parthenogenesis is a form of sexual reproduction di D. Animals may reproduce either sexually or asexually but never both
- Using the following list, describe the proper sequence for the events of animal development: 1. Tissues, organs, and other body structures in each segment are formed. 2. Axes of the entire animal are determined. 3. Cells become differentiated. 4. The entire animal is divided into segments. a. 2, 3, 4, 1 b. 1, 2, 4, 3 c. 2, 4, 3, 1 d. 3, 2, 4, 1 e. 2, 4, 1, 3What are the correct pairings of developing and embryonic structures in the gastrulation of chickens? Multiple answers is possible. If no correct option is given write the proper pairings. a. Epiblast – ectoderm b. Secondary hypoblast – endoderm c. Primary hypoblast – endoderm d. Migrating cells - mesodermCompare and contrast sexual and asexual reproduction. Identify the most accurate statement. a. Asexual reproduction results in more offspring per mother. b. Sexual reproduction is always more costly. c. Sexual reproduction is associated with an increase in homozygosity. d. Asexual reproduction is always bad for a species.
- Answer the following questions regarding adaptive and non-adaptive developmental plasticity: a) Define adaptive developmental plasticity, providing at least one example of a case study b) Define non-adaptive developmental plasticity, providing at least one example of a case study c) Describe at least one way in which adaptive developmental plasticity and non-adaptive developmental plasticity differ.Which of the following rows correctly identifies a difference between blastocysts and morula? Select one: A. Blastocyst Morula Contains trophoblast and a zygote Contains 8 cells that are totipotent B. Blastocyst Morula Contains inner cell mass with germ layers Contains 8 cells that are totipotent C. Blastocyst Morula Contains trophoblast with germ layers Contains 16 cells that can become any cells in the human body D. Blastocyst Morula Contains trophoblast and inner cell mass Contains 16 cells that can become any cells in the human bodyWhat are the correct pairings of developing and embryonic structures in the gastrulation of chickens? a. Epiblast- ectoderm c. Primary hypoblast-endoderm Read the following statements CAREFULLY: I. II. III. IV. b. Secondary hypoblast - endoderm d. Migrating cells - mesoderm The germ band needs to retract for fruit fly segments to develop properly. The formation of the sea urchin archenteron is made possible by epithelial cells that underwent epithelial-to-mesenchymal transition. Frog gastrulation involves the epiboly of endoderm cells. Chicken endoderm and mesoderm is formed through the migration of cells through both the anterior and posterior end of the primitive streak. a. All choices are true b. I & Il are true but IV is false d. IV is sometimes true c. Ill is false
- What are the relative advantages and disadvantages ofsemelparity and iteroparity? In answering, consider iteroparousspecies that have both short and long expected life spans in theirnatural environments.Define metamorphosis.A. Water currents in the ocean are much stronger than any sperm. How do sperm and egg find each other? B. In humans there are no water currents and the volume of the female reproductive tract is relatively limited. Then, why does the male have so many sperm? 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?