Answer:
The correct answer is D
Explanation:
The cell membrane is essentially composed of the following:
- phospholipids
- cholesterol
- proteins
The phospholipid consists of a <em>hydrophilic </em>phosphate 'head' and the tail is the <em>hydrophobic</em> fatty acid chain.When cellular membranes form,phospholipids collect into two layers in light of these hydrophilic and hydrophobic properties. The phosphate heads in each layer face the fluid or watery condition on either side, and the tails conceal away from the water between the layers of heads, since they are hydrophobic.
There are 3 main factors that greatly influence the fluidity of the plasma membrane:
- temperature
- cholesterol
- saturated and unsaturated fatty acids
Answer:
a. You record the air temperature every day for a week.
Explanation:
Recording air temperature every day for a week can be classified as making an observation.
Observation is a part of the scientific method. It is a basically a way of collecting data.
- During observation, our senses can be used or instruments.
- Depending on the nature of the study, specialized instruments helps to bridge the limitations of our senses.
- A good scientist is a keen observer.
- Making a record of air temperature usually by using a thermometer is a way of carrying out observation.
When you record air temperature, you are making an observation.
Take for example - you touching something sharp and instantly moving your hand away.
Sensory neurons in your fingers detect the external stimuli of the sharp object and send a nerve impulse to the spinal cord (does not reach brain) and is sent back to a motor neurone - attached to an effector that moves the muscle and moves the hand away. This is a rapid reflex action and involuntary.
Answer:
Yes on both parts
Explanation:
Microscopic creatures including bacteria, fungi and viruses can make you ill. And they are alive
Answer:
1. an offspring with two identical alleles for a trait is homozygous.
2. only some traits are inherited
3. offspring inherit two alleles for a gene from each parent.
