1.) D
2.) A,B
3.) 1) A saturated salt solution is definitely hyper tonic.
2) Depending on the cell and the salt, there will be an isotonic concentration, where everything is balanced.
4) 1) Water tends to enter the Paramecium.
This is a process of passive transport.
This is a case of osmosis. In osmosis the SOLVENT travels from a region of low solute density to region of high solute density.
2) Paramecium have what is called a contractile vacuole which contracts forcing water out to keep a stable osmotic pressure in the cell. Considering the vacuole would need to use energy is would be active either way
Flowers of plants that are pollinated by animals such as birds or insects are usually colorful. Colours sometimes helped by coloured guiding marks attract animals. Also, flowers are often shaped to provide a landing platform for animals, especially insects or have scent to attract them. Flowers adapted to birds’ pollination are often long-shaped with lots of nectar.
When it comes to wind-pollinated (or water) plants, it is important for them to produce a huge amounts of pollen, to have small petals or no petals at all (like grass). Also, the stigmas of receiving flowers have to be sticky.
c is the right answer
Explanation:
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Answer:
Everything at some point belonged to a common ancestor, but these four species are considered to be like this because of similar ancestral traits that have been passed on to generations such a homologous pairs, vestigial structures, they are all mammals, similar amino acid sequences, vertebraes, etc.