<h2>The given statement is true</h2>
Explanation:
The recent finding of the fossils which showed that <em>Homo erectus</em> and <em>Homo habilis</em> lived side by side in eastern Africa for perhaps half a million years challenged the conventional way that these two species evolved one after the other(<em>H.habilis</em> 1.44 million years old and <em>H.erectus </em>1.55 million years old)
- The fossils were found in Kenya and took years to prepare the specimens for study and to be sure of the identification of the species, the scientists said
- University of Utah geologists determined the dates of the fossils from volcanic ash deposits
- The most recent <em>Homo habilis</em> that had been known was about the same age as the earliest <em>Homo erectus</em><em>,</em> said Daniel Lieberman, a professor of biological anthropology at Harvard University, “Now we have extended the duration of the habilis species, and there’s no doubt that it overlaps considerably with erectus”
- The fact that the two hominid species lived together in the same lake basin for so long and remained separate species, Meave Leakey said in a statement from Nairobi, “suggests that they had their own ecological niche, thus avoiding direct competition”
Biochemical stress is another factor fire
<u>Answer:</u>
<em>Meeting current needs while preserving the resource for the future is the objective of sustainable farming. </em>
<u>Explanation:</u>
<em>Sustainable farming uses methods that increase productivity but also understands that the precious natural resources</em> are to be reserved for the future generations also.
Cultivating different types of crops to meet the needs of the <em>population while using non renewable resources in limited amount</em> is the method advocated by sustainable farming. Nutrient replenishment has to be done adequately because once the land is depleted of its <em>nutrients it becomes unsuitable for cultivation. </em>
Over irrigation also produces negative effects by increasing the soil salinity. <em>Productivity increase coupled with resource conservation is the aim of sustainable development. </em>
Answer:
evolved specialized tubules lined with transport epithelia
Explanation:
The epithelium is a basic tissue that forms a continuous, protective layer of cells. Moreover, transport epithelia are specialized types of epithelium that are involved in the absorption of ions and water from one side to the other of the epithelium, which are responsible for the movement of solutes both in osmoregulation and excretion. During the evolution of excretory organs, higher animals developed specialized tubules associated with transport epithelia whose function is to excrete waste products and selectively retain (filter) nutrients.
