Answer:
C.pollen contains the sperm cell
Answer:
A. Can be small can be large
C. Have living parts have non living parts.
Answer:
Explanation:
A modern scientific inquiry system uses the scientific method to understand and explain the natural phenomenon.
The scientific theory involves various steps which begin with making an observation , asking questions, doing background research and proposing a hypothesis. The hypothesis is tested through experiments which prove or disproves the hypothesis which when established form laws and theory.
The Mendel followed the same approach unaware of the scientific method and performed experiments to answer the scientific question of how traits are controlled and passed on in generations. He analysed the conclusions which were proved after his death by other scientists and framed the biological laws called Mendel's law of inheritance.
Thus, Mendel's inquiries followed the same steps of the scientific method.
Answer:
A neuron that has only one axon but several dendrites is classified as:
a. multipolar neuron.
Explanation:
- The neurons are the fundamental unit of the nervous system.
- The nervous system consist of only two types of cell; neurons and neuroglia.
- Neurons are specialized to respond to physical and chemical stimuli, conduct nerve impulse and release neurotransmitter , while the neuroglia supports , nourish and protect the neuron.
- Most neurons have three parts: a cell body, dendrites and axon.
- Neurons show a great diversity in size and shape, and are classified on the basis of structure and function.
On the Basis of structure the neurons are classified as: unipolar, bipolar and multipolar. (Multidendritic neurons are studied in <em>Drosophilla </em>and are reported to be a result of misexpressed<em> gene</em>)..
- Multipolar neurons are the most common type of neurons in the brain and spinal cord and have several dendritic processes and one axon.
- Bipolar neurons are found in retina of the eye, in the inner ear and in the olfactory area of the brain and are characterized by one dendrite and one axon.
- Uni-polar neurons have single processes extending from the cell body which divide into two branches.
On the basis of function neurons are classified as; sensory, motor and association neurons.
During action potential, the electrical charge inside the neuron is possible compared to the electrical charge outside the neuron.
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