Answer:
the answer is-Secondary consumers are higher in the food web because they eat primary consumers.
Explanation-
Here is an example of a simple food chain:
grass → cow → human
- the grass is the producer as it makes its own food through photosynthesis.
-the cow is the primary consumer for it eats the producer.Its a herbivore (eats plants)
-And the human is the secondary consumer as it obtains energy by eating the primary consumer.
Comman Mistake-The arrows in food chains show the way in which energy is moving. They do not show what eats what.
Answer:
Option B, Observation 2
Explanation:
The four main observation of Darwin’s areas follows –
Observation 1 – Variation occurs in the species with time leading to evolution. Offspring of two parents vary distinctly in traits such as height, color, weight etc. These variations are also affected by the surrounding environment
Observation 2-
Based on observation 1, Darwin concluded that offspring inherit traits from their parents. These traits improve the odds of survival and only genetic traits will be passed. Traits developed in an individual due to environment will not be passed on.
Observation 3 –
Offspring compete among themselves to survive.
Observation 4
The fittest among the competing species for survival will survive and pass on its traits to the next generation.
Since here the Pigeon breeders want to exemplify the looks (a genetic trait) of parents to their offspring, observation 2 applies here
Hence, observation b is correct
The correct answer is option A, that is, development often causes habitat fragmentation, which can threaten biodiversity.
Fragmentation is usually illustrated as a reduction in some of all the kinds of natural habitats in a landscape, and the differentiation of a landscape into smaller and more isolated segments. With the development of the fragmentation process, the ecological influences will modify.
Fragmentation can be a result of natural procedures like floods, fires, and volcanic activity, but it is more generally caused due to human activities like an increase in the number of roads, housing developments, shopping centers, and parking lots.
With the enhancement in human activities, the effect of fragmentation become more. Eventually, it results in the devastating influences on the local species, a complete modification to the landscape, and the loss of the region's wilderness heritage.
<span>A sperm cell is produced by spermatogenesis. </span>In order for the sperm cell to achieve a diploid state, the sperm cell must fertilize an egg.