We examined the biogeographic patterns implied by early hominid phylogenies and compared them to the known dispersal patterns of Plio-Pleistocene African mammals. All recent published phylogenies require between four and seven hominid dispersal events between southern Africa, eastern Africa, and the Malawi Rift, a greater number of dispersals than has previously been supposed. Most hominid species dispersed at the same time and in the same direction as other African mammals. However, depending on the ages of critical hominid specimens, many phylogenies identify at least one hominid species that dispersed in the direction opposite that of contemporaneous mammals. This suggests that those hominids may have possessed adaptations that allowed them to depart from continental patterns of mammalian dispersal.
plz mark me as brainliest if this helped :)
Ans.
Testes and ovaries are male and female reproductive organs, respectively. These organs are similiar as testes produce male gametes or sperms by the process of spermatogenesis and ovaries produce female gametes or ova by the process of oogenesis.
These gametes fuse together to form zygote that develops into a multicellular organism. Thus, the correct answer is 'option A). both produce sex cells.'
True. The law of science says so so it is
Answer:
The map distance between sn and ct is = 25 m.u or map unit.
Explanation:
Given, sn ct+ × sn+ ct
In F1 generation the progenies were interbred.
In F2 generation,
sn ct = 13 (recombinant)
sn ct+ = 36 (parental)
sn+ ct = 39 (parental)
sn+ ct+ = 12 (recombinant)
<em>Linkage Map distance = (no. of Recombinant progeny/total progeny) </em>
<em> × 100 </em>
<em>Recombination frequency = (no. of Recombinant progeny/total progeny) </em>
<em> × 100</em>
= ( 13+ 12) /100 × 100 m.u
= 25/100 × 100
= 25 %
∴ The distance between sn and ct = 25 m.u or map unit
∴ Linkage happened between sn and ct as the map distance is much less than 50
Mitosis is a cell division that occurs in the nucleus of a cell. Mitosis is 2 cells, called daughter cells, that are genetically identically to the original cell.
