9. A mesoderm is a germ layer that arises during gastrulation and is the middle layer of the embryo. An example of inverterbrate with mesoderm is
an earthworm
Answer:
Secondary succession
Explanation:
Ecological succession is the term used to describe any series of change in the composition of an ecosystem over a particular period of time. Ecological succession is made up of two types viz: primary succession and secondary succession.
Primary succession involves the formation of a brand new ecosystem by the colonization of a barren area of land e.g bare rock, where no life existed. Secondary succession, on the other hand, is the recolonization of an area by a new set of organisms because the previously existing organisms have been wiped out by certain disasters e.g fire outbreak, hurricanes etc. In secondary succession, there is soil, which makes it possible for new organisms to sprout quickly after the calamity.
Example of secondary succession is when a fire outbreak burns the organisms in a community, allowing the root of grasses to sprout after.
Answer: 10. A. capital. 9. B. 8. C.
Explanation:
The options attached to this question are given below:
A. contains mostly needle-leaved evergreen trees.
B. is home to herds of giraffes, zebras, and wildebeests.
C. receives less than 25 cm of precipitation per year.
D. has low-growing; touch shrubs and rock, dry soils
.
ANSWER
The correct option is D.
The chappral biome is one of the most widespread biome in the world, it can be found on almost all continents. The major characteristic of the biome include the following:
It has both forest and grassland,
It has two major seasons, winter and summer; the summer season is usually very dry and last for about five months.
The dry summer makes the biome sensitive to fire outbreak, which is a common occurrence there.
The amount of rain available to the biome is about 10 - 17 inches per year and is only able to support shrubs growth, only few trees can be found in the biome.
The biome can be a plain, a rolling hill or a mountain and the soil is usually very dry.
