Answer: Permeable
Explanation: In the picture you can see that only the red ones can pass through.
Answer:
These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils. Pathogenic (disease-causing) microorganisms must make it past this first line of defence. If this defence is broken, the second line of defence within your body is activated.
Explanation:
Many grana, large surface area for photosynthetic pigments, electron carriers and ATP synthase enzymes. Photosynthetic pigments are arranged into structures called photosystems, allows maximum absorption of light energy.
During mitosis, the cells divide and multiply into two. So multiply 18 by 2 and the daughter will have 36 chromosomes.