Botanical Questions!! Urgently, please teach with a high finger

The endosperm is ubiquitous in angiosperm seeds, so it should be said that it is not a condition that distinguishes monocots from dicots.

Compared with dicots, the two types of plants can be distinguished according to the vein order of the leaves, the type of root system, and the morphological characteristics of the flowers.

To help memorize the example of corn, monocots (e.g., corn) first have parallel or arc veins. Secondly, the taproot is generally underdeveloped, and the fibrous root system is formed by most adventitious roots. The final flower base is usually 3, and the calyx and corolla are very similar and difficult to distinguish.

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Monocots have only one ** leaf in their embryo Most monocot seeds have an endosperm.

The embryo has a ** leaf, the vascular bundles in the stem are scattered, there is no cambium, the stem usually can not be thickened, the leaf veins are equal veins or arc veins, the parts of the flower are usually 3 or 3 multiples, the taproot is not developed, and most adventitious roots form fibrous root system.

Monocots : 1 class of the phylum Angiosperms. The veins are often parallel, the mosaic leaves are basically 3, and the seeds are characterized by one cotyledon.

Angiosperms generally have endosperms.

1. Sycamore (plane tree) 2, willow 3, poplar tomentosa 4, yueji 5, locust jaw 6, cedar 7, canna 8, morning glory 9, lotus 10, clove 11, white grass (thatch) 12, chrysanthemum 13, bauhinia 14, masson pine 15, water hyacinth 16, spring 17, dogtail grass. (1) Among the plants on campus, there are 7 species of herbaceous plants and 10 species of woody plants. (2) those belonging to herbaceous plants, 3) those belonging to shrubs, and 4) those belonging to trees

There are 8 species of herbaceous plants and 9 species of woody plants.

Herbaceous plants are: canna, morning glory,; Lotus, lilac, white grass (thatch), chrysanthemum, water hyacinth, dogtail grass.

Arbors are: French plane tree (plane tree), willow, tomentosa, locust, cedar, masson pine, shrubs are: Yueji, Bauhinia, spring.

You're from Jinqiao, it's a question on a paper. We might even be classmates.

Each amino acid has at least one -NH2 and one -COOH, and the peptide bond is formed by the dehydration of these two groups, so the peptide bond in the middle is gone, and only one at each end is left, so at least 1 is left.

So choose C

In order to study the life activities of human beings.

1.The morphology and structure of organisms living in water are adapted to the aquatic environment to 2The mouth is able to digest both food and nutrients.

Wrong. Although saliva has amylase, the oral mucosa can absorb sugar. But the amount is small.

3.Humans in the ecosystem can dominate everything.

No, people are also dependent on others.

4.Bile is rich in digestive enzymes.

Wrong. No digestive enzymes.

Select:1In biological experiments, the commonly used instrument for weighing solid objects is (a)aBalance b. Beaker c. Graduated cylinder d. Measuring cup 2The most important energy supply substances in the human body are C, AProtein B. Fat c

Sugars dVitamin 3Lele's mother is a doctor, and on Mother's Day, Lele prepared a sumptuous dinner for her mother:

Rice, brine shrimp, braised fish, spicy tofu and pork rib soup. When my mother came home from work, she praised Lele first, and pointed out that this is an uneven nutrition, and what you think is missing from dinner (please explain the reason for this question).

a.Braised pork b. Stir-fried spinach cScrambled eggs dPolenta b Leafy greens are lacking and already have carbohydrates and proteins.

1。Right. The streamlined body of a fish.

2。Right. Salivary amylase digests starch, and oral epithelial cells can also absorb some small molecules.

3。Wrong. If you really dominate, no one will die of illness.

4。Wrong. Bile has no digestive enzymes.

The most basic content in the book, if you have to explain it, you will be hopeless, read the book.