·\'11 Verizon 7:21 PM A Starts out female, then changes to male B. None of these
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·'11 Verizon 7:21 PM A Starts out female, then changes to male B. None of these . Starts out female, stays a female D Starts out male, then changes to female E Starts out male, stays a male A Starts out female, stays female B. Starts out female, then changes to male C. Starts out male, then changes to female D. Starts out male, stays male E None of these A. Thorns B. Tannins C. Spines D. All of these E allaloids. A. Gestate the young in the mother's body and give birth to live offspring B. Lay eggs in a protected place and leave them to hatch on their own C. None of these D. Lay hard-shelled eggs and incubate them until hatching E Form leathery-shelled eggs inside the mother's body and retain the eggs until they hatch, then give birth to the offspring A. Diploidy B. Monoploidy C. None of these D. Polyploidy E Haploidy A. Mountains B. Desert C. Aquatic D. Forested E None of these A. None of these B. Rapidly-changing enviroament with low food availability C. Relatively stable environment in which there is one major predatior D. Relatively stable environment with low food availability E. Rapidly-changing environment with sufficient food to f suppont the energetic costs of sexual reproductionExplanation / Answer
Answer:
1. (D) Starts out male, then changes to female
Explanation:
Protandrous hermaphrodites refer to organisms that are born male and at some point in their lifespan change sex to female.
2. (B) Starts out female, then changes to male
Explanation:
Protogyny is the condition in which a species begins life as a female and is capable of changing into a male at a later stage
3. (D) All of these
Explanation:
Thorns are modified branches with sharp, pointed appearance. In other words, at every place where a plant would have a branch, a thorn would be there instead. Spines are modified leaves that are also sharp and pointed. In other words, spines are in place of leaves on a plant. Plants also produces tannins for protection against insects.
4. (A) Gestate the young in the mother's body and give birth to live offspring
Explanation:
Viviparity refers to bringing forth live young which have developed inside the body of the parent.
5. (D) Polyploidy
Polyploid cells and organisms are those containing more than two paired (homologous) sets of chromosomes.
6. (C) Aquatic
Explanation:
External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water.
7. (E) rapidly changing environment with sufficient food to support the energetic cost of sexual reproduction
Sexual reproduction is beneficial in terms of genetic recombination, which contributes to the maintenance of species, but it is also energetically costly.
8. (C) One plus three polar bodies
One primary oocyte divides by meiosis and produces one polar body and one secondary oocyte. The polar body goes on to produce two more polar bodies, and the secondary oocyte divides into one polar body and one ovum. Therefore, one cell is produced from one primary oocyte.
9. (D) Parthenogenesis
Parthenogenesis is a natural form of asexual reproduction in which growth and development of embryos occur without fertilization.
10. (E) Four
11.(A) Failure of chromosomes to separate during mitosis or meiosis, or fusion of diploid gametes
Polyploidy arises as the result of total nondisjunction of chromosomes during mitosis or meiosis.
12. (C) Crowded conditions, low food availability, long day length
Daphnia can reproduce both asexually and sexually. During times of plentiful food, females reproduce asexually to produce clones. When food is scarce, Daphnia reproducesexually in order to produce genetic variation and increase the chance of species survival.
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