Answer: Option D.
Sexual isolation.
Explanation:
Sexual isolation is a process in which a species of organism is unable to breed or mate from related species successfully due to environment, physiological, behavioral or genetic difference making its to depend on species involved in the cross. Examples is found in amphibians frogs and toads. Breakdown of sexual isolation lead to hybrid sterility, hybrid invaibility or poor gene flow.
The correct answer is the hippocampus.
Some of the most powerful EEG signals in the human brain are generated precisely here, within the hippocampus. These signals are known as the hippocampal theta rhythm, which can usually be seen either when you are running, or during REM sleep.
Sexual reproduction occurs in the flower of flowering plants. Male gametes are produced in anthers of the flower and are found in pollen. Female gametes are produced in the flower’s ovary and are found in ovules.
Hope this helps
Tissues are below complex organs.
<h3>What are the tissues?</h3>
- The body is made up of four different types of tissue: epithelial, connective, muscular, and nervous. Each has a purpose for which it was created.
- Connective tissue, epithelial tissue, muscular tissue, and nerve tissue are the four fundamental forms of tissue. Other tissues are held together and supported by connective tissue (bone, blood, and lymph tissues). A coating is provided by epithelial tissue (skin, the linings of the various passages inside the body).
- Tissue that gives bones their strength and structure. Compact tissue (the tough outer layer) and cancellous tissue make up bone (the spongy, inner layer that contains red marrow). Osteoblasts, which build new bone, and osteoclasts, which break down existing bone, maintain bone tissue.
- Blood tissues can be found inside blood vessels, including arteries, arterioles, capillaries, venules, and veins (for more information on the names of individual blood vessels and the course the blood takes, see systemic circulation), as well as inside the heart's chambers.
To find the level is just below organs in complexity:
Tissues are below complex organs.
To learn more about Tissues, refer to:
brainly.com/question/513973
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