Answer & Explanation:
Here's the order of the planets, starting nearest the sun and working outward through the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune — and Planet Nine.
Answer: The hydrogen bonds holding the base pairs together in a DNA molecule are relatively weak compared to other chemical bonds. ... The new nucleotides join together to form the sugar-phosphate backbone of a new strand of DNA. The result is two DNA molecules identical to the original.
Explanation:
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).
So, the endoplasmic reticulum does many things, such as folding the protein molecules in sacs called cisternae. It also transports synthesized proteins in vesicles to the Golgi apparatus.
Adaptation is evolutionary process that fits organisms to their environment, increasing their evolutionary fitness. It is in a first place, a process rather then a part of a body or a physical form.
Adaptation is one of two main processes that explain the observed diversity of species. Other process is speciation.
All adaptations help organisms survive in their environments.
The adaptive traits may be physiological, behavioural or structural.