Answer:
In an ecosystem, what happens to the atoms of certain chemical elements, such as carbon, oxygen, and nitrogen? They move into and out of living systems. process in which chemical energy is used to produce carbohydrates. ... single-essential nutrient that limits productivity in an ecosystem.
Explanation:
Fertilization refers to the process of two gametes of opposite sex uniting (option C).
<h3>What is fertilization?</h3>
Fertilization is the process whereby the male gamete unites with the female gamete to form a zygote.
In sexually reproducing organisms, the male organism of a species produces a gamete called sperm cell while the female organism produces egg or ova.
Therefore, it can be said that fertilization refers to the process of two gametes of opposite sex (male and female) uniting.
Learn more about fertilization at: brainly.com/question/9874606
#SPJ1
Urine differs in composition from the fluid that first enters a nephron tubule by filtration because <u>filtrate has more salts because of reabsorption and secretion</u>.
Filtrate is the liquid that is formed in the kidneys while urine formation is taking place. Water is the major component of urine, forming about 95% of it while the remaining part is formed by other organic and inorganic constituents.
As blood flows through the glomerulus, blood pressure pushes water and solutes from the capillaries into the capsule through a filtration membrane.
To learn more about composition of urine in the first stage of nephron tubule, here
brainly.com/question/14137464
#SPJ4
<h2>THE DIGESTIVE SYSTEM</h2>
by PierreShine
Title:
<h2>A SUGAR MOLECULES LIFE </h2>
1st entry
- Hello, there! I'm a sugar molecule who lives in a miniature chocolate Debbie Cake! I've just lived a brief life, and today is the day I delve into the unknown, the human body's interior. I'm quite apprehensive! As the ravenous teenager rips the plastic wrapper from my body, I experience a mixture of thrill and dread as I'm brought to his mouth, readied for mechanical digestion, and immediately transfixed by the boy's keen teeth. As a thick substance called saliva tears me apart into minute molecules, I begin to feel the incredible amount of anguish coursing through my body. This must be the "chemical digestion" I'd heard about! I degrade when the boy swallows me.
2nd entry
- I can feel the heart sphincter loosen as I pass through it. I'm waiting...and then the stomach secretes hydrochloric acid into the esophagus, creating the teenager's acid reflux! Now I'm in a muddle with hydrochloric acid, pepsin, and mucus generated by the stomach wall glands.
3rd entry
- I'm now slipping through the body at a breakneck speed! The small intestine appears to be visible! It's like a gigantic slide, with such a small opening, yet I'll slide right in!
4th entry
- Simply floating here and riding through the water and other fluids released by the stomach, such as hydrochloric acid, pepsin, and mucus, or chyme, which is soupy food that used to be solids.
5th entry
- I'm absorbed into the lining of the small intestine by the capillaries, and I know I've accomplished my goal! I can see the light now.
6th entry
- In the small intestine, the coolness is still present. I'm not sure I'll go to the big intestine; it appears that it's only for water and water-soluble vitamins. Whoa! I'm glad to see all of my sugar molecule pals here! We've all started clumping together and forming a solid!
7th entry
- Isn't it possible that we're about to leave? There isn't much water or drink in this place! But we're being pushed! We're on our way down! I notice an opening and believe we're about to leave the body!
