Biology, 16.07.2019 11:30 ChanceJ

Which of the following best compares gymnosperms and angiosperms? a. both reproduce sexually, but gymnosperms contain only xylem and angiosperms contain xylem and phloem. b. both reproduce sexually, but gymnosperms produce pollen cones and seed cones and angiosperms produce flowers or fruit. c. both contain xylem and phloem, but gymnosperms reproduce asexually and angiosperms reproduce sexually. d. both contain xylem and phloem, but gymnosperms produce spores and angiosperms produce either cones or flowers and fruit.

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The statement that best compares gymnosperms and angiosperms is : A. Both reproduce sexually, but gymnosperms contain only xylem and angiosperms contain xylem and phloem.
Gymnosperms produce exposed seeds, not enclosed in fruit whilst Angiosperms have Fruits, flowers, and endosperms as defining characteristics.

Answer from: GreenHerbz206

The correct answer will be option B (Both reproduce sexually, but gymnosperms produce pollen cones and seed cones and angiosperms produce flowers or fruit).

Explanation:

Reproduction in plants takes place by both sexual and asexual ways.

In angiosperms, sexual reproduction takes place by the formation of special structure called "flowers" which are the formed by the modification of leaves. Flower is the evolutionary feature of the angiosperm which facilitate the same function in all plants that is reproduction by providing the mechanism of fertilization of pollen and egg cell resulting in the formation of seeds.

In gymnosperms, sexual reproduction takes place by the formation of special structures called "cones", a characteristic feature of the group gymnosperm. Cones contain both the male (pollen) and female (egg cell) gametophytes. The male cones produces pollens which are carried to the female cone by wind thus, facilitating sexual reproduction in gymnosperms.

hence, option B is the correct answer.

Answer from: Quest

blue

light-years

magnitude

Answer from: Quest

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.