Sperm must be deposited and transported to the site of fertilization. Ovulation must occur and the egg must be "picked up" by the tube. Union between the sperm and egg must result. The embryo must implant and begin to grow in the uterus.
Answer:
2. The fossil record is the highly ordered sequence in which fossils are found in layers of sedimentary rock
Explanation:
The order is most plausible when considering the "big picture" of the emergence of life-forms dating back to old and previous era of Earth's history.
<span>Nervous system is a network of specialized cells that monitors the internal and external environment and initiates commands through which the body reacts.
Nervous system is very important part of our body because it is the system which is controlling our body. If there is no nervous system we could not perform any function. It sends the message to and from the brain to all parts of body.</span>
Answer;
B. Yeast doesn't have a cell wall. The onion skin cell has a cell wall.
Explanation;
-An onion is a multicellular (consisting of many cells) plant organism.As in all plant cells, the cell of an onion peel consists of a cell wall, cell membrane, cytoplasm, nucleus and a large vacuole. The nucleus is present at the periphery of the cytoplasm.
-The vacuole is prominent and present at the center of the cell. It is surrounded by cytoplasm. The presence of a cell wall and a large vacuole are indicators that help identify plant cells, such as seen in the onion peel.
Like bacterial cells, yeast cells have cytoplasm and a membrane surrounded by a cell wall that lacks cellulose, like those of plants. Yeast cells have a nucleus.They are smaller than animal and plant cells, but slightly larger than bacteria.
