The answer to your question is flowering plants are the most recently evolved of the major groups of plants, arising only about 130 million years ago. Despite their geological youthfulness, angiosperms are the dominant plants of the world today: about 80% of all living plant species are flowering plants. Furthermore, they occupy a greater variety of habitats than any other group of plants. The ancestors of flowering plants are the gymnosperms , which are the other major group of plants that produce seeds. The gymnosperms, however, produce their seeds on the surface of leaf-like structures, which makes the seeds vulnerable to mechanical damage when winds whip the branches back and forth, and to drying out. Most importantly, conifer seeds are vulnerable to insects and other animals, which view seeds as nutritious, energy packed treats. In angiosperms, the margins of the seed-bearing leaves have become inrolled and fused, so the seeds are no longer exposed but are more safely tucked inside the newly evolved "vessel," which is the ovary.
The other major advance of the angiosperms over the gymnosperms was the evolution of the flower, which is the structure responsible for sexual reproduction in these plants. The function of sexual reproduction is to bring together genetic material from two individuals of differing ancestry, so that the offspring will have a new genetic makeup.
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Answer:
Yeah, none of my teachers actually teach that’s why I use this.
I really don’t know that’s really confusing... do you still have Internet or do you have self internet turned on?
Answer:
Ethical issues that arise from modern biotechnologies include the availability and use of privileged information, potential for ecological harm, access to new drugs and treatments, and the idea of interfering with nature. Applications include agriculture and health care.
Explanation:
pls mark brainliest
The correct answer is D. Separate injections of tetanus toxoid and tetanus antitoxin in different sites on this visit to ensure active and passive immunization.
Explanation:
Tetanus is a bacterial infection caused by Clostridium Tetany, this occurs as an object with the bacteria cuts the skin or causes a wound. Due to this, every time there are lacerations or cuts in an accident it is important to provide protection against Tetanus. This commonly occurs through the Tetanus vaccine also know as tetanus toxoid that is administered during childhood and works through passive immunization. However, if the patient has not been previously immunized he/she must receive tetanus toxoid and separately tetanus antitoxin that prevents tetanus through active immunization.
According to this, in the case presented the patient should have separate injections of tetanus toxoid and tetanus antitoxin (Option D) because this patient has not been previously immunized and therefore requires both tetanus toxoid and tetanus antitoxin, additionally, as each of these is different, they should be administered separately, but almost at the same time to prevent tetanus infection.
