1A 200 1 year, in the pastoral forest farm located 6 kilometers southwest of Zhoukoudian site in Beijing, the forest farm staff found human fossils. Dr. Wen of the same name told reporters that the research results show that the skeletal characteristics of rural Neanderthals are mostly consistent with those of modern people.

2C

The giant panda and the red panda are two completely different animals. As we all know, the giant panda, also known as the panda, is a "national treasure" animal, and its appearance and body shape need not be said. The appearance of a red panda is very different from that of a giant panda. Its fur is red and brown, its eyes and cheeks are white spots, it drags a thick tail with nine colored stripes, but its eating habits are similar to those of giant pandas, and it likes bamboo shoots and leaves. It is a national second-class protected animal. From this point of view, no matter how small the panda is, it will be called "Giant Panda" when it is born, and no matter how big the panda is, it can only be called "Little Panda" even if it is old.

Ruby is red corundum and sapphire is blue corundum.

5A

6b The motion submitted by 36 delegates at the Fifth Session of the Ninth National People's Congress suggested that the red-crowned crane should be identified as the national bird of China.

7B Peony is a woody plant, and Paeonia lactiflora is a herbaceous plant.

8A

9B The most mature technology is to produce fuel ethanol from corn, wheat and sugarcane.

10A

1 1D such as duckweed, water lily, water lily and water hyacinth.

12C

13A sponge belongs to porous animals and is the simplest multicellular animal in the world.

The cell differentiation of sponge is very low, with no head and tail, no trunk and limbs, no nerves and organs.

14B Its eyes are not born on both sides of its head like other birds, but in front.

15A Soil microorganisms include bacteria, actinomycetes, fungi, algae and protozoa.

16A。 Cambrian species explosion

From 542 million years ago to the Cambrian 5. 1 100 million years ago, the evolution of life on earth entered a prosperous period. In millions of years, the once empty ocean was suddenly filled with many new life forms, and many creatures appeared on the stage of the earth's ocean. This is the first species explosion event revealed in fossil records-"CAMBRIAN species explosion".

17A

18A Australopithecus (8 million to 7 million) Australopithecus (4.2 million to 1 10,000) Homo erectus (2 million to 1.75 million) (2 million to 200,000) (200,000 to 50,000 in the early stage)

Homo sapiens (late 50,000 to 1 10,000)

19B The average brain volume of Beijingers is 1088ml.

20D Morgan is a person's name. There is an animal called Morgan beast, which is terrestrial and obviously different from the other three.

2 1A

22B Due to meteorite impact

23B

24B

Yes, this is a sign that rotifers have evolved into fish.