Answer:
answer is B carbohydrates, fats and protiens
vaccines are weakened viruses or bacteria that prompt the body to develop antibodies to foght against disease
Answer:
Crust, mantle and core.
Water availability.
Volcanic eruptions.
Explanation:
The main similarities about Early earth and Modern earth is their layers of soil such as crust, mantle and core means that the both Early earth and Modern earth are made up of these three layers. At that time water is present in huge amount while on the other hand, in Modern earth water is also present in large amount as compared to land. Volcanic eruptions occurs in both early and Modern earth.
Answer:
a. the sporophyte stage becomes the dominant stage
Explanation:
Non vascular seedless plants are represented by bryophytes (mosses, liverworts and hornworts). Within their life cycle, gametophyte is the dominant stage as it the assumes the nutritional role (photosynthetic activity) and lives longer than the sporophyte, which grows on and at expense of the gametophyte. Sporophytes are usually non photosynthetic and with a shorter lifetime, only reduced to a foot, stalk and capsule where spores are developed and then released.
On the other hand, in seeded, vascular plants (conifers and flowering plants) the situation is quite the opposite, as the sporophyte is the dominant stage for it is macrocopically much more evident and larger, its lifetime accounts for almost the total life cycle and assumes all the photosynthetic role (proving nutrients to the gametophyte). In these plants the gametophyte is completely dependent on the sporophyte and is reduced to a the pollen grain (male gametophyte or micro gametophyte) or embryo sac (female gametophyte or mega gametophyte).
Answer:
Biotechnology is the exploitation of biological processes for industrial and other purposes, especially the genetic manipulation of microorganism for the production of antibiotics, hormones etc.