Question

ПОМОГИТЕ ПЖ!НЕ могу справиться 1кол-во семян в одной семенной коробочке определяется- 1)Завязей 2)Плодолистников 3)Пестиков 2В 1930 году Вал Нилл правильно предложил что атомы кислорода выделяемые прастениями происходит из- 1)Н2О 2)СО2 3)С6Р12О6 4)О3 3.Принадлежность эритроцитов человека к группам А,В,О определяется хим. сигнальными в-вами на их поверхгости хим. сигналами являются- 1)Молекулы липид 2)Пилипептиды 3)Нуклеиновые кислоты 4)Олигосахариды 5)Антитела

Answer 1

1в.
1)-Завязей
2в.
4)-ОЗ
3в.
1)-Молекулы липид

Answer 2

It looks like you have a few different questions related to biology and botany. Let's address each question one by one.

Number of Seeds in a Seed Box:

The number of seeds in a seed box is determined by the number of ovules, which are located within the ovary of a flower. Each ovule has the potential to develop into a seed after fertilization. The ovules are typically located within the ovary, which is part of the flower's female reproductive structure. The number of ovules can vary depending on the species of plant and the specific characteristics of the flower.

Atom Origins in Plants:

In 1930, Val Niel correctly proposed that the oxygen atoms released by plants come from carbon dioxide (CO2) during the process of photosynthesis. This process involves the conversion of carbon dioxide and water into glucose and oxygen, with the oxygen atoms in the resulting oxygen gas coming from the original carbon dioxide molecules.

Blood Cell Grouping:

The classification of human erythrocytes (red blood cells) into blood groups A, B, or O is determined by the presence of specific chemical signal molecules on their surface. These chemical signal molecules are primarily oligosaccharides, which are short carbohydrate chains attached to proteins or lipids on the surface of the cell membrane. These oligosaccharides serve as antigens and are recognized by the immune system, leading to the classification of blood into different groups based on the presence or absence of specific antigens.

Feel free to ask if you have any further questions or need more information on these topics!