2 and 3
1 is describing the process to separate monomers
2 multiple monomers create polymers
3 removal of water to join monomers
4 they are joined by covalent bonds
<span>An object has a kinetic energy of 25 J and a mass of 35 kg, 1.19 metre/sec fast is the object moving</span>
The Pteridopyhta, phylum of seedless vascular plants has about 1000 known living species, including those in the genera Lycopodium and Selaginella; the gametophyte of some of these species cannot photosynthesize, and instead uses mycorrhizae to obtain nutrients.
Explanation:
The pteridophytes, most advanced group of plant among the cryptogams i.e. seedless plants.
They are first land plants that have developed a well defined vascular system.
Ferns, horsetails etc are common members of this phylum.
It is the main endocrine gland and a small structure in the head. It's named the "master gland" because it produces hormones that control other glands and many other body functions including growth. It consists of the anterior and posterior pituitary.
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The most common way I believe you can get it is from another family member. Not in the sense that it's contagious, but that it's genetic. You can also get it from stuff in the air you might be allergic to such as dust or pollen. Diseases and infections in the chest will further provoke it. If you smoke, you are also more likely to get it. Also, if you are overweight it puts a strain on your lungs so your more likely to have an attack.