a shrew is adapted for burrowing and a monkey for tree dwelling. their forelimbs appear quite different from each other's, but the internal structure of the forelimbs of these two animals is same. what do you conclude from this example?

a) the forelimbs of the shrew and the monkey are homologous structures, so these two animals share a common early ancestor.

b) the forelimbs of the shrew and the monkey are analogous structures, so these two organisms share a common early ancestor.

c) the forelimbs of the shrew and the monkey are homologous structures, so these two animals would be able to interbreed.

The correct answer would be option A.

Explanation:

Homologous structures can be defined as organs or anatomical skeleton of living organisms, that look different in different animals but are similar in anatomical structures, which displays that the animals share a common ancestor. Homologous structures generally have structures that are similar in their structure but the function is different.

The forelimbs of shrew and monkeys appear to look different but similar internal structure as homologous organs.

Thus, the correct answer would be option A.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !