D. Can be found in the membrane, cytoplasm, or nucleus.
Answer:
Target cell: this cell has a receptor that can bind the ligand. The ligand binds to the receptor and triggers a signaling cascade inside the cell, leading to a response. ... When a signaling molecule binds to its receptor, it alters the shape or activity of the receptor, triggering a change inside of the cell.
Explanation:
Answer:
3 Pollen tube forms and grows through the style
5 Sperm fertilizes the egg
1 Pollen is released from the anther
4 The pollen tube reaches the ovule within the ovary
2 Pollen sticks to the stigma
Explanation:
The process of double fertilization entails the fertilization of the egg by one sperm and that of two polar nuclei to produce the triploid endosperm tissue that nourishes embryo.
* The image describes the process in detail.
Answer:
<h3>Cellulose is the carbohydrate than can be easily digested by ruminants </h3><h3>but not by humans because</h3>
Explanation:
<h3>this cellulose carbohydrate can't be digested by humans because the appropriate enzymes to break down the beta acetal linkages are lacking .</h3>
The correct answer is option I, II and IV.
An angiosperm refers to a plant, which exhibits flowers and generates seeds enveloped within a carpel. The angiosperms are a large group and involve shrubs, herbaceous plants, the majority of trees, and grasses. A gymnosperm refers to a plant, which has seeds unprotected by a fruit or an ovary. The gymnosperms comprise of conifers, ginkgo, and cycads.
In the given case, both the sunflower (angiosperm) and gingko (gymnosperm) are seed-producing plants. However, the seeds of a sunflower are safeguarded by a flower or a fruit, while in case of Gingkoes they are not. Also, sunflowers include double fertilization, while the Gingkoes involve only a single fertilization.
