Autotrophs remove CARBON DIOXIDE from the air and fix this into tissues providing OXYGEN for secondary consumers.
Autotrophs are self-producing organisms that are found within the environment. These are plants that can sustain their lives through the process of synthesis. Without these producers, life on earth would cease to exist.
Answer:
The correct answer is biological.
Explanation:
When any pathogen invades the body, it has to pass several lines of defence. The first barrier is the skin and mucous membrane which is a physical and chemical barrier. The second line of defence is the non-specific response by macrophages, neutrophils and interferon. After crossing these two barriers the third line of defence comes into action in which, the B- cells and T-cells act specifically on the pathogen and destroy it.
The correct answer is option B
A cladogram can be defined as a diagram that uses cladistic to show the relation among the organisms. Many evolutionary trees can be made from a single cladogram but the cladogram cannot be considered as the evolutionary tree because it does not shows that how the ancestors of the species is related to the descendants.
The cladogram of reptiles are made.
Answer:
It could not exist without bacteria.
11. A. Ovulation.
12. Semen.
13.The fluid--to some degree--helps protect the sperm from the acidic environment of a woman's vagina, which could otherwise damage and kill said sperm.
14. During the menstrual cycle, the endometrium grows to a thick, blood vessel-rich tissue lining, representing an optimal environment for the implantation of a blastocyst upon its arrival in the uterus; the body also begins to prepare for ovulation again.
15. Both the testes and the ovaries produces entities needed for the process of reproduction. But while the ovaries create eggs, the testes create sperms.
16. On the 7th day; on the 21th day.
17. C. The amniotic sac.
18. The umbilical cord.
19. The germinal stage, the embryonic stage, and the fetal stage.
20. two eggs; a single egg.
21. Since the pituitary gland produces hormones that stimulating all the other hormone-producing glands to produce their own hormones, that tumor could potentially causes the body to function incorrectly: For example, the body could not produces the required hormones needed for the body to start producing sperms/eggs, preventing the person's ability to reproduce overall.