. Identify the theme or themes exemplified by (a) thesharp quills of a porcupine, (b) the development of amulticellular organism from a single fertilized egg,and (c) a hummingbird using sugar to power its flight.
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. Identify the theme or themes exemplified by (a) the
sharp quills of a porcupine, (b) the development of a
multicellular organism from a single fertilized egg,
and (c) a hummingbird using sugar to power its flight.
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- (1) What part of the flower produces the male reproductive cells? (2) Which contraceptive is seen in the first picture? (3) What era in the geologic time scale is the age of reptiles? (4) The main advantage of meiosis and sexual reproduction is the creation of _____ offspring. What offspring? (5) Which process takes place in both methods A and B in the second picture? (6) What event marks the end of each geologic era? (7) One explanation for the timing and length of the leopard frog breeding season is that it occurs___? (8) The time it takes for half of an isotope atoms to decay is called ___?Which of the following is true about Sea urchin blastula formation and fate map? a) ectoderm that develops into the larval skin and neurons, is regularly produced by the vegetal half of the embryo. b) an1 layer generates cells that can enter either the ectodermal or endodermal organs of the larva. c) veg2 layer forms the endoderm, coelom (internal mesodermal body wall), and the non- skeletogenic mesenchyme. d) small micromeres differentiate into the PGCS e) large micromeres differentiate into the secondary mesenchyme cellsAsexual reproduction does exist with numerous unique adaptations, but it is normally sexual with both male and female sexes. a) Describe the different types of parthenogenesis and give an example of each type of insect. b) List and briefly describe four important elements that affect a female's ability to generate eggs and the amount of eggs that are oviposited.
- (2) Absence of its natural predator in india (3) Its oxygen scavenging activities from water bodies VAT Both (1) and (2) 12. Find the odd one with respect to ploidy level (1) Sperm (2) Egg (3) Anthrozoid Ner Zygote / 13. Which one is haploid AAL CAMERA Shot by Sourndi bet p Marre 2021/05/28 07:28 (1)profile-image For which organism and life stage would you expect to see the most rapid senescence? A.) A long-lived organism that has not yet reached sexual maturity. B.) A semelparous organism with parental care that has completed reproduction. C.) An iteroparous organism that has completed its first breeding season. D.) A semelparous organism without parental care that has completed reproduction.Explain about The Megasporangium (Ovule).
- The developmental pattern of C. elegans is said to be mosaic because (a) development is controlled by gradients of morphogens (b) part of the embryo fails to develop if a founder cell is destroyed (c) some individuals are selffertilizing hermaphrodites (d) all development is controlled by maternal effect genes (e) apoptosis never occurs(a) Distinguish between asexual and sexual reproduction. Why isvegetativereproduction also considered as a type of asexual reproduction?(b) Which is better mode of reproduction : Sexual or Asexual? Why?Which of the following steps of sea urchin fertilization initiates the formation of the fertilization envelope? A Acrosomal reaction Fast block to polyspermy Egg activation Cortical reaction Chemo-attraction
- 1-Propose an example of an (non-insect) animal with indirect post-embryonic development and continuous growth. 2-Propose an example of an (non-insect) oviparous animal with direct post-embryonic development.What process is occuring indicated by the letter A Name the strcuture indicated by the letter B Name the strcuture indicated by the letter C What process is occuring between zygote to embryo stage indicated by the letter D? What process indicated by letter E is occuring that result in the plant zygote? What strcuture is in the circle indicated by the letter F? What word is used to describe the strcuture indicated by the letter G? What are those small strcutures that are settling on this flower part indicated by the letter H.Study the sea star development slides, including early and late stages and identify the following stages and structures: zygote, two cell stage, morula (stage), blastula (stage), blastocoel (cavity), archenteron (cavity), ectoderm (layer), endoderm (layer), gastrula (stage). **See Table 52.1, Section 52.3 & 52.4 in textbook ** Why is it useful to study the development of sea stars (Echinodermata) when studying human development? What do the two have in common?
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