Answer:
Evolution in nature by natural selection only modifies the structures present in the ancestors and favors the better adapted structures.
Explanation:
An engineer can design the bones and muscles of the forelimbs of given organisms as per their needs and give rise to new unique structures for each of these organisms.
On the other hand, evolution in nature allows the modification of existing traits by the accumulation of variations. The adaptive variations in the traits are then favored by natural selection. Therefore, forelimbs of mammals such as horses, whales, and bats have evolved by modification of the forelimbs present in their common ancestors.
The limitation of modification of existing structures does not allow the formation of a completely new structure.
The group of animals that group or live together are called
analogies. Analogies are structures that
result from convergent evolution - species from different evolutionary branches
= no shared ancestry similar appearance examples - wings of bees and bats,
Australian mole an North American mole - both look similar, they occupy the
same niche.
What they mean by "base" is the substance. A base is a substance that tastes bitter, has a pH that is greater than 7. It also turns red litmus paper blue.
In conclusion, what they mean by 'base' is the substance included.
Answer:
B — to relate the type of box material to the warmth of air within the box
Explanation:
She changed the box material and measured the warmth of the air in the box.
A is wrong. The question does not mention the mass of the box.
C is wrong. The boxes were all the same size.
D is wrong. Each box was exposed for the same length of time.
Answer:
D) producers
Explanation:
In an ecosystem, as plants are termed autotrophs, they are the producers.
An ecosystem is made up of both living and non-living components which co-exists together.
- plants are classified as producers as they take inorganic substances from the environment to produce their own food.
- this food is taken up by other members of the ecosystem for their own nourishment too.
- they are the producers and consumers depends on them for nourishment.
