Biology questions, high school biology questions for answers

1) Various essential mineral elements (1 point) CO2 (1 point) Light (1 point) 2) Carbon source and energy (2 points).

3) A more subdivided concentration gradient between (2 points).

4) Suitable light, add appropriate concentration of glucose (2 points).

Scientists have bred five white flower strains with different genotypes from one purple flower strain of this plant, and these five white flower lines are only a pair of alleles with this purple flower line. --From this sentence, it can be concluded that there is only one pair of alleles for white flowers, which is different from purple flowers.

When a student was planting a large number of purple flower strains, he stumbled upon a white-flowered plant and self-crossed it, and the offspring all showed white flowers. --From this sentence, it can be concluded that because they are all white flowers after inbreeding, the pair of alleles in the white flowers that are different from the purple flowers are pure recessive. If there is a recessive allele of the purple flower, there will be no chance of one plant being found in a large number of plants, but the offspring will appear white flowers.

Therefore, there can be no recessive genes in purple flowers.

It's been many years since I graduated, I don't know if this explanation is right, I hope it helps, it's best to ask the teacher for a correct solution.

Hope it solves your problem.

1 Efferent nerve along the fusion potential changes.

2b cell chemical information to electricity.

3 Hematopoietic stem cells body fluids.

1. Identification of the medium of crude bacteria in the leakage and virtual cellulose decomposition shed, and autoclaved and sterilized;

2 Cellulase, CMC enzyme reigration activity (mg g·h) Supplement: 3 Yeast, facultative anaerobic, energy.

5 Biomes and inorganic environments.

If you are a new course standard, the 300-point science and biology in the college entrance examination has a total of 90 points, including six multiple-choice questions and five major questions (with electives), of which heredity and variation are the most difficult, and they must be tested every year. Homeostasis and environment, the regulation of organisms, and cell structure are all key contents, and the final elective varies from person to person.

Zhejiang Biotech is the same as Beijing.

The first unprecedented one is right Biofilm structure characteristics: it has a little fluidity 2 ribosomes (not endoplasmic reticulum, both endoplasmic reticulum and Golgi apparatus are responsible for assembly and transportation) Structure 7: Golgi apparatus, processing proteins from endoplasmic reticulum.

aerobic respiration, mitochondria; May also be derived from 1 chloroplast; Carry out photosynthesis on the next pair.

Active transport of energy carriers (not osmosis, this is mature cells that can be actively transported. And the title also says that it is selective absorption, and there is no selectivity in osmosis).

lipids, proteins, sugars; a certain amount of liquidity; Endoplasmic reticulum; Golgi apparatus, endoplasmic reticulum;

Photosynthesis; Chloroplast; Mitochondria; Respiration.

vacuolar osmosis; Poor concentration, cell membrane.

Plant Cells Chloroplasts Vacuoles Lower Plants Nucleolus Mitochondria Aerobic Respiration Cytofluid 8 Cell Wall Cellulose Fully Permeable 10 Chloroplasts 3 Ribosomes 6 C. oplasts Cytoplasmic matrix 2 Endoplasmic reticulum 7 Golgi apparatus.

1. Mesophyll cells are the main reaction site of photosynthesis, and vascular sheath cells are only the place where C3 is converted to C4.

2. The key is whether there is a complete nucleus.

3. The matrix of green leaf cells.

Eukaryotes have a nuclear membrane-coated nucleus, while prokaryotes only have a nucleometre.

3.Where does the dark reaction occur in a photosynthetic reaction??

chloroplast matrix.