Answer:
1/4
Explanation:
Given that the F2 cross produces offspring according to the expected 9:3:3:1 ratio.
YyRr X YyRr:
Let us break the dihybrid cross into individual monohybrid crosses.
Yy X Yy :
Y y
Y YY Yy
y Yy yy
2/4 or 1/2 of the offspring are heterozygous for the trait.
Similarly, in Rr X Rr cross, 1/2 of the offspring are heterozygous for the trait.
Together, 1/2 * 1/2 = 1/4 of F2 plants are expected to be heterozygous for both traits.
Can you please elaborate..?
The correct answer is: A) pontine respiratory centers
The respiratory centre in the pons is responsible for generating and maintaining the rhythm of respiration. Besides this elementary function, it also has the ability to adjust respiration rhythm in c response to physiological changes. Respiratory centre consists of three major respiratory groups of neurons:
• The dorsal respiratory group (DRG)- initiates inspiration (inhalation)
• the ventral respiratory group (VRG)-responsible for exhalation
• Pontine respiratory group- includes the pneumotaxic (controls both the rate and the pattern of breathing) and apneustic centers (promotes inhalation by sending signals to dorsal group).
The Himalayan region is located at a height of more than 3300m above sea level. Similar to Terai, the hilly region's altitude spans from 600 to 3300 meters above sea level. In Terai, it is hot, whereas the Himalayas are frigid. In the Hilly region, the temperature is moderate and neither hot nor cold.
<h3>How the Himalayan differ from the Terai region ?</h3>
Due to differences in geographical makeup and height, the mountainous, hilly, and Terai regions differ from one another. Mountains are found in high elevation.
- Bengal tigers are most numerous in the Himalayan grasslands, where they coexist with Asian elephants and one-horned rhinos. Red pandas, golden langurs, and takins can find refuge in the highlands. Bengal tigers and snow leopards are only known to coexist here in the globe.
- Rhododendrons are found all throughout the world, although they are more prevalent in the wetter regions of the eastern Himalayas, where they can grow as tall trees or short shrubs. In the alpine zone's lower elevations, when humidity is high, mosses and lichens thrive; flowering plants are found at higher elevations.
- Sloths, Himalayan black bears, yellow-throated martens, Himalayan gorals, Ganges dolphins, gharials, and crocodiles are some other rare animals. Human-animal conflict is a pressing issue in the Terai Arc, which encompasses a substantial portion of the state of Uttar Pradesh.
- Cycas pectinata, Gnetum montanum, Duabanga grandiflora, Calamus species, Cythea pinulosa, Pandanus nepalensis, and Podocarpus neriifolius are examples of the typical vegetation in this area. The Terai region as a whole is dominated by Shorea robusta (sal).
To know more about the Himalayan region please click here : brainly.com/question/26697261
To know more about the Terai region please click here : brainly.com/question/20882485
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Answer:
Plants absorb nutrients and water and and is anchored through their roots
Explanation:
The roots absorb water and minerals from the soil and anchor the plant in the ground. The stem supports the plant above ground, and carries the water and minerals to the leaves. The leaves collect energy from the Sun and make food for the plant, using an amazing process called photosynthesis.
