Answer:
150
Explanation:
According to the given information, the pink-flowered plant (Rr) is crossed with a red-flowered plant (RR). The pink-flowered plant would make two types of gametes: 1/2 with "R" and 1/2 with "r".
The red-flowered plant would make all gametes with "R" allele. The random fusion of these gametes gives pink and red-flowered progeny in 1:1 ratio.
Since 50% of plants of the progeny are red-flowered, out of 300 offspring, the total red-flowered plants would be= 50 % of 300 = 150.
Answer:
Cretaceous
Explanation:
From what has been examined so far, there are evidence that at the end of the Cretaceous period a very large asteroid or comet stuck the Earth. The impact was where modern day Yucatan is located, and it released such an enormous energy that it managed to change the face of the Earth. The explosion itself managed to kill off pretty much everything nearby, but there was also a very hot wave that circled the whole planet. Enormous amounts of dust and ashes were released into the atmosphere that blocked the Sun, and the volcanoes all over the globe were triggered. This caused major climate and environmental changes, leading to a mass extinction, with the most noticeable victims being the dinosaurs.
Explanation:
Aerobic respiration is more efficient than anaerobic respiration because the former produces a net of 34 ATPs while the latter produces a net of 2 ATPs in one cycle. Therefore with enough oxygen supply, most cells with both options opt will utilize aerobic respiration.
However, occasionally, the cell's energy demands are usually higher than the oxygen supply (such as during an athlete's short fast sprint), hence, in this case, the cells shift to anaerobic respiration to power the cell activities.
Anaerobic respiration evolved first because the first cells had to live in earth whose atmosphere was mainly carbon dioxide and methane. However after the Great Oxygenation event, organisms evolved to utilize oxygen in cellular respiration.
Learn More:
For more on anaerobic and aerobic respiration check out;
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Hey there!
Nuclei with a high neutron-to-proton ratio usually undergo a beta emission.
Beta emissions, unlike some other types, is radioactive decay throughout these particles, and can have half lives like other types of exponential (usually) decay. Neutrino, along with <em>beta rays,</em> are coming from, or emitted from the nucleus - hence the name.
Hope this helps!
Answer:
Explanation:
The Mesozoic Era is known as period of significant tectonicas well as climate, and evolutionary activity. It was known as as " Age of Dinosaurs or Reptiles" . During this era, the dominant form of life is dinosaurs.The Mesozoic Era come to life, arround 252.2 million years back. This Era can be sectioned into three different periods which are; ✓Triassic
✓Jurassic
✓Cretaceous
The span period of Cenozoic era was about 65 million years, this range from the end of the Cretaceous Period as well as the extinction of non-avian dinosaurs up to the present. Cenozoic era can be reffered to Age of Mammals such as (woolly rhinoceroses) this is because the largest land animals at this is mammals .The Cenozoic Era can be regarded as "new life" and it's known to be " age of mammals simply because largest animal that is available that time is mammals This era serves as the current as well most recent era among the three geological eras of the Phanerozoic Eon. The Cenozoic era has its spans of about 65 million years, and this range from towards end of the Cretaceous Period to the extinction of non-avian dinosaurs up to the present
The Cenozoic Era can be sectioned
into three periods which are;
✓ Paleogene : This is arround 66 million to 23 million years ago)
✓ Neogene : This is arround 23 million to 2.6 million years ago)
✓Quaternary; This is arround 2.6 million years ago to the present);