please answer it fast as it is possible
Answers
Answer:
cater pilar
ovary
gills
Answer:
8. a) tadpole
9. d) ovule
10. c)
Explanation:
11. The respiratory rate is the rate at which breathing occurs. This is usually measured in breaths per minute and is set and controlled by the respiratory centre.
12. When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale
13. When a pollen grain lands on the stigma of a flower of the correct species , a pollen tube begins to grow. It grows through the style until it reaches an ovule inside the ovary. The nucleus of the pollen then passes along the pollen tube and fuses (joins) with the nucleus of the ovule.
14.Vegetative propagation/reproduction defines to the asexual method of plant reproduction to form new plant variants either through regeneration or by fragmentation. ... A plant reproducing asexually through natural or artificial means is called vegetative propagation. Examples include tissue culture and layering.
15.Male flowers (top) produce pollen from the numerous stamens. Female flowers (bottom) have a well-developed ovary with long sticky stigmas in the centre. Although female flowers have stamens, they do not produce functional pollen.
16. Some animals live under water have special respiratory organs to take dissolved oxygen in water. These organs like gill and skin which help them respire under water.
Some as aquatic plants have special mechanism which help them to exchange of gasses. They give oxygen in water and take carbon dioxide in return. Aquatic plants are able to absorb this carbon dioxide and they make their food directly from the water.
17. larva of frog and respire through Gill
18.Not every plant grows from a seed. Some plants, like ferns and mosses, grow from spores. Other plants use asexual vegetative reproduction and grow new plants from rhizomesA root-like subterranean stem that usually sends roots below and sends up shoots.
19. a. I) potato tuber ii) leaf
19. b) The stomata control gas exchange in the leaf. Each stoma can be open or closed, depending on how turgid its guard cells are. In the light, the guard cells absorb water by osmosis , become turgid and the stoma opens.
20.Unisexual and bisexual flowers are two types of flowers found in plants. ... The main difference between unisexual and bisexual flowers is that unisexual flowers contain male and female reproductive organs in separate flowers whereas bisexual flowers contain both male and female reproductive organs in the same flower.
21.Sexual Reproduction in Plants
Reproduction in plants takes place sexually and asexually as well. But the majority of the flowering plants reproduce sexually. The flower is the reproductive part of a plant i.e., both male and female gametes are produced by flowers. Sexual reproduction in plants takes place in flowers. The complete flower typically consists of four parts:
Petals
Sepals
Stamen (male reproductive part)
Pistil/Carpel (female reproductive part)
Stamen (male reproductive part) consists of anther and filament.
The anther is a sac-like structure that produces and stores pollen.
The filament supports the anther.
The pistil (female reproductive part) comprises three parts- stigma, style, and ovary.
Stigma is the topmost part of a flower.
The style is the long tube which connects the stigma to the ovary.
The ovary contains a lot of ovules. It is the part of the plant where the seed formation takes place.
A flower may consist of either stamen or pistil or both. Based on this, a flower can be either uni sexual or bisexual. A bisexual flower is composed of all the four parts mentioned above, e.g. Rose, China rose. Whereas, plants like papaya and cucumber produce only uni sexual flowers.