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TEA [102]
4 years ago
9

Gymnosperms have been around for at least:

Biology
1 answer:
FinnZ [79.3K]4 years ago
6 0
Records indicate the first gymnosperms likely originated in the Paleozoic era, middle Devonian period about 390 millions years ago.
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Part C
AnnyKZ [126]

The style is the female reproductive part of the plant. it plays important role in plant breeding .

What is style and the role of style in reproduction ?

The stigma and ovary are connected by a long tube-like structure called the style. The pollen tubes bearing male gametes enter the style tissues and travel to the ovary's ovule once the stigma's pollen grains have germinated. Once within the embryo sac, it travels to the egg cell to fertilize it with the aid of the filiform apparatus.

The style is crucial to the plant reproduction  process since it not only serves as the site for the formation of the pollen tube but also functions to prevent incompatible pollen from entering the ovary. Genetic information is transferred between the pollen and the plant when the pollen tube begins to spread within the style. The plant also produces a poison at this period. The plant will release the poison to block the formation of the pollen tube if the pollen is unsuitable because it comes from a different species or is too closely related, leading to inbreeding.

If the pollen is compatible, the plant will isolate the poison and sequester it so that the pollen tube growth is not halted. Therefore, the style is the area where compatibility is evaluated and where it is decided if pollen that falls on a flower will be allowed to fertilize the plant.

Learn more about plant reproduction here :

brainly.com/question/15492488

#SPJ13

8 0
2 years ago
Which statement accurately describes this population of alligators in Florida
Marrrta [24]

Answer:

— Florida residents know that we share the state with a large alligator population — an estimated 1.3 million to be exact! And while that can be scary, alligators are fundamental to the state's wetlands.

Explanation:

7 0
3 years ago
a. List two structures that are found in plant cells but are not found in animal cells. b. Provide the function (job) of each st
Lyrx [107]

Answer:

1. CELL WALL

2. CHLOROPLAST

Explanation:

1. Cell wall provide structural support and protection.

2. Chloroplast involved in photosynthesis to make glucose as food for plants cell.

7 0
3 years ago
If you have a compound that directly injects a pair of electrons into complex III of the electron transport chain during aerobic
hammer [34]

Answer:

A) 6

Explanation:

Complex III of the electron transport chain transfers four protons across the membrane during aerobic respiration, per pair of electrons. In the other hand, complex IV is responsible for transporting two protons (per pair of electrons) across the membrane.

If the given compound injects a pair of electron into complex III,  four protons will accumulated due to complex III activity and then two more protons as these electrons move forward to complex IV. This means a total of 6 protons being transported to intermembrane space.

5 0
3 years ago
In the carbon cycle, the role of plants is to
Katen [24]

Answer:

The answer is  B to remove carbn dioxide from the atmospehre your welcome and i hope your happy

Explanation:

7 0
3 years ago
Read 2 more answers
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