Gills enhance diffusion between aquatic creatures' blood and the surrounding water. They have a large surface area to increase the area available for gas exchange and a lot of capillaries to increase the bloodflow through the gills.
Answer: Asexual reproduction
Explanation:
Many organisms (like bacteria) and plants undergo asexual reproduction. Species that produce via asexual reproduction can produce up to 600 offspring’s in one season. Asexual reproduction does not involve six cells or fertilization, only one parent is involved so there is no fusion of gametes and no mixing of genetic information, all offspring’s are clones. Budding occurs in plants when they undergo asexual reproduction and starfishes cut themselves in halves and they grow to form a new starfish.
Asexual reproduction is rapid and reproduce their species in a large number
Answer:
The correct answer is- b. P: coughing; C: saliva; B: complement system
Explanation:
Body show physical, chemical and immunological response against foreign antigen to protect the body from them. Coughing, sneezing, skin, respiratory tract, gastrointestinal tract comes under physical barrier. They restrict the bacteria to get into the body.
Chemical barrier includes saliva, tear, sweat, mucus that helps in killing the pathogen at the outer body surface. Antibodies, immune cells, complement system comes under immune response which helps in destroying the pathogen which are present in the body.
The correct answer is B. <span>When a bar magnet is cut in half, each half has a north pole and a south pole.
So, Candice learned that every magnet has two magnetic poles. This means that when you cut a whole magnet into two parts, you will get two new magnets. According to her observation, each of these two new magnets are going to have a north pole and a south pole.</span>