Which step comes first in mitosis?

The chromosomes duplicate, forming pairs of chromatids

An unspecialised cell that can divide and become different cell types

What is the correct order of a reflex arc?

Receptor, sensory neuron, interneuron, motor neuron, effector

Convert glucose into glycogen for storage

So fertilisation restores the diploid number without doubling it each generation

Human blood group (A, B, AB or O)

Dead lignified tubes carrying water and minerals up from the roots

It is biconcave, has no nucleus and is packed with haemoglobin

Thin walls one cell thick for a short diffusion distance

16questions. Pick an answer and you'll see why right away.

What are the two main roles of mitosis in a multicellular organism?
Which step comes first in mitosis?
What is a stem cell?
Which neuron carries an impulse from a receptor to the central nervous system?
What is the correct order of a reflex arc?
When blood glucose is too high, the pancreas releases insulin, which makes the liver:
Why must gametes be haploid?
What is formed when a male gamete fuses with a female gamete?
Which is an example of discrete variation?
Two heterozygous parents (Bb x Bb) are crossed, with B dominant. What phenotype ratio is expected?
Which describes the xylem correctly?
Which change increases the rate of transpiration?
Which feature do arteries have that suits carrying high-pressure blood?
How is a red blood cell adapted to carry oxygen?
Which adaptation of the alveoli speeds up gas exchange?
What do the villi in the small intestine absorb into the blood?