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Rama09 [41]
3 years ago
9

Which mating of four-o'clock plants would produce progeny that were either green, variegated, or white

Biology
1 answer:
PilotLPTM [1.2K]3 years ago
6 0

Answer:

variegated female x green male

Explanation:

The four o'clock (<em>Mirabilis jalapa</em>) plant is a common ornamental species of <em>Mirabilis</em> (clade Angiosperms, flowering plants) whose leaf pigmentation is a well-known case of maternal inheritance. Moreover, chloroplasts are organelles that have their own genome which follows a maternal inheritance pattern in the majority of plant and animal species because they are contained in the cytoplasm (i.e., chloroplast DNA is inherited only from the mother because only the maternal cytoplasm persists after fertilization). Thus, chloroplast DNA has an inheritance pattern that challenges Mendel's Laws of inheritance (i.e., distinct from nuclear DNA). In the case of the four o'clock plant, the genes responsible for leaf color are located in the chloroplast genome and therefore these genes are transmitted from the female parent to the progeny. In this case, the leaf variegation is caused by two different types of chloroplasts that are inherited from the mother: normal green chloroplasts and defective chloroplasts (without chlorophyll pigment).

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3 years ago
In an ecosystem, the herring population was reduced by fishermen. As a result, the tuna, which feed on the herring, disappeared.
Mkey [24]

Answer:

                         -------> Herring---------> Tuna

                      /                      

Sand eels ⇒/

                     \

                        \

                           ---------> Cod -----------> Seabirds

Explanation:

Food Web is the complex interplay of  interconnection between food chains and a graphical representation of what-eats-what in an ecological community.

From the question, the herring population was reduced by fishermen and as a result the tuna which feed on the herring disappeared. This implies that the tuna depends solely on the herrings for feeding. without they wont survive.

As we proceed, we were being told that the sand eels which are eaten by herring, increased in number.

If we pay close attention, we will understand that due to the reduction of the herrings  made the sand eels to increased in numbers. The point is that herrings also feed on the sand eels, but as the herrings is being reduced by some anthropogenic factors caused by the fishermen the sand eels increased.

Also, the fishermen overharvested the sand eel population and the aftermath effect shows reduction in Cod and Seabirds. This implies that Cod feeds on sand eels and Seabirds feeds on Cod, but as the food chain is being disrupted by overharvesting of the sand eels, the effect was shown by a decreased in the Cod and Seabirds.

Therefore, the best diagrammatic representation that could fit best for this explanation is:

                        -------> Herring---------> Tuna

                      /                      

Sand eels ⇒/

                     \

                        \

                           ---------> Cod -----------> Seabirds

5 0
2 years ago
You find a green organism in a pond near your house and believe it is a plant, not an alga. the mystery organism is most likely
koban [17]
I believe that the mystery organism is most likely a plant and not an alga if it is surrounded by a cuticle.  Thus the answer is B.
Alga and plats are similar in that they can produce their won food from nutrients and sunlight by a process called photosynthesis. The main difference is in their complexity, such that algae are simple organisms, sometimes unicellular, and even the largest types are relatively simple in structure. Green algae does not contain cuticle. 
7 0
3 years ago
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