<span>The option that best explains why ecosystems need a continual influx of new energy is C. energy flows through an ecosystem and cannot be recycled. Given that it cannot be recycled, and it comes and goes, ecosystems need new energy to replace the old one they may have lost over time. Other answers don't really make much sense and don't have a lot to do with energy/</span>
The first living things on Earth, single-celled micro-organisms<span> or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have </span>first<span> appeared on </span>Earth<span> almost four billion years ago, just a few hundred million years after the formation of the </span>Earth<span> itself.</span>
Answer:
Red flowers (dominant) crossed with white flowers (recessive) can yield pink flowers. Pink is the heterozygous condition in a trait that shows incomplete dominance. If pink flowers are crossed with white flowers, assuming random chromosome segregation, what percentage is expected to be red flowers?
RR x rr= Rr, Rr, Rr, and Rr
Red x White= Pink heterozygous
Rr x rr= Rr, Rr, rr, and rr
Pink x White= 0% as both Pink and white shares it with 2:2 or 50:50%
Explanation:
The most distinctive feature of ape dentition, which clearly distinguishes apes from Old World monkeys, is a Y-5 molar pattern.
<h3>What is the Y-5 molar pattern?</h3>
- This is a distinctive type of molar teeth pattern found in apes and hominoids.
- In this, 5 cusps or raised surfaces are present on the grinding surface of teeth, roughly forming a Y- shape. Therefore, this is also known as Y-5 pattern.
- Whereas Old world monkeys have only 4 cusps on their lower molars present in a bilophodont pattern.
- A Y-5 molar is formed when the tooth is divided into different pieces which form the complete structure of the tooth.
- In bilophodont pattern the tooth is divided into 2 symmetric sections.
- The dental formula of apes is 2.1.2.3/2.1.2.3 i.e. 2 incisors, 1 canine, 2 premolars, 3 molars.
Learn more about dentition in apes here:
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