The correct answer is A. They produce food by photosynthesis.
Since leaves are the ones that photosynthesize food, here the stems have to do it because there are no leaves.
Answer:
Positive affect" refers to one’s propensity to experience positive emotions and interact with others and with life’s challenges in a positive way. Conversely, "negative affect" involves experiencing the world in a more negative way, feeling negative emotions and more negativity in relationships and surroundings.
These two states are independent of one another, though related; someone can be high in positive and negative affect, high in just one, or low in both. Both states affect our lives in many ways, particularly when it comes to stress and how we handle it.
Answer:
The correct answer is - overdominance.
Explanation:
In the given question, genotype Pp is a heterozygote condition that has a 54% survival rate or fitness thus these individual people get more chance of mating and increase in number as compared to the other two conditions of PP or pp traits where PP has 45% survivability, less than heterozygous condition and more than pp that has only 4% rate.
It results in a normalizing selection model of natural selection as a moderate trait, that is heterozygote, is selected. Thus, the selection of overdominance which means heterozygote condition produces a better phenotype than PP or pp parents is heterosis.
Since there are no choices to choose from, I'll just site all the structures of the leaf with its role then.
A Leaf has the following structures:
Cuticle
Upper epidermis layer
Palisade layer
Xylem
Phloem
Spongy mesophyll layer
Air space
Lower epidermis layer
Stomata
<span>Guard cells</span>
