Active transport refers to a substance moving from areas in which it has low concentration to an area with high concentration, one example i guess is endocytosis, "<span>the taking in of matter by a living cell by invagination of its membrane to form a vacuole"</span>
D.8
Outermost shell means valence electrons and the 36th element (krypton) has 8 valence electrons
Answer: The correct answer is-
muscle, nervous, connective, and epithelial.
Tissue can be described as a group of specialized cells that are clustered together to perform particular function.
There are primarily four main types of tissue, which are present in the human body. These tissues are-
Muscle tissue ( assist in locomotion and provides structural support to body).
epithelial tissue ( covers surface of body surface and forms internal lining in most of the organs),
connective tissue ( such as bones, cartilage, blood) that is abundantly present in the body.
nervous tissue ( helps in the transmission of electrical signals through out body).
The correct answer is gravity.
The planets and other heavenly bodies are attracted towards the earth by the earth's gravity. The pull which is formed by the gravity of earth holds the objects near the earth surfaces. The planets and atmosphere is also kept around the earth's surface by the gravity.