All categories

4 years ago

Which is abiotic? a.tree sap b.insect c.sunlight d.wood table

1 answer:

3 0

Abiotic factors are considered to be non living things and factors and as such it would be C. Sunlight. I'm this case. Tree sap is a product produced from a living organism, that specific species of tree and as such would not be categorized as Non living.

You might be interested in

The following table describes some biotechnological processes.

baherus [9]

Answer:

c . Process 1 describes cloning and process 2 describes artificial selection.

Explanation:

Process 1 describes cloning because offspring is produced that are similar to its parent and we know that in cloning, the offspring is identical to their parents while on the other hand, process 2 describes artificial selection because crossing between a high-yielding fruit variety with a high-vitamin variety is done which is only possible through the intervention of humans.

8 0

3 years ago

List three particles found in blood plasma and give their main purpose.

aev [14]

Answer:

Blood plasma is a 'yellowish liquid' component of blood that holds the blood cells in whole blood in suspension. It is the liquid part of the blood that carries cells and proteins throughout the body. It makes up about 55% of the body's total blood volume. It is the intravascular fluid part of extracellular fluid. It is mostly water, and contains important dissolved proteins, glucose, clotting factors, electrolytes, hormones, carbon dioxide, and oxygen. It plays a vital role in an intravascular osmotic effect that keeps electrolyte concentration balanced and protects the body from infection and other blood disorders.

7 0

4 years ago

In humans, sickle-cell anemia is an example of co-dominance, when considered at the molecular level. People who are homozygous d

Stolb23 [73]

Answer:

Yes, 50% homozygous vs 50% heterozygous

Explanation:

Let dominant sickle cell allele be represented by an allele A while the recessive form be represented by S.

A person that is homozygous dominant for the trait will be AA genotype.

A person that is heterozygous for the trait will be AS genotype.

A cross between the homozygous dominant and heterozygous will be:

AA x AS

The F1 offspring will be AA, AA, AS, and AS (See the Punnet's square result)

Recall that: AA produce all normal-shaped hemoglobin molecules. Hence, 50% of the offspring will produce all normal-shaped hemoglobin.

Also, the ratio of homozygous to heterozygous offspring is 1:1, equivalent to 50% homozygous vs 50% heterozygous.

Therefore, considering the questions;

Will any of their children produce only abnormal hemoglobin? The answer is yes.

What percentage of their offspring will be homozygous versus heterozygous? The answer is 50% versus 50%

5 0

3 years ago

Describe how the following would change if you were to extend your arm at the elbow (that is, stretch the biceps).

Fittoniya [83]

Answer:

a. The biceps would relax causing it to increase in length

b. The firing of the muscle-spindle afferents from the biceps would decrease.

c. The alpha motor neurons would contract or decrease.

Explanation:

The skeletal joints in the human or animal body are controlled by muscles. Examples of these muscles are the biceps and triceps found in the human arm. They control the elbow joint with the biceps in front and triceps at the back of the elbow.

When the arm is extended from the elbow, the biceps relaxes or extends while the triceps contracts. This increases the length of the biceps and reduces the triceps length.

8 0

3 years ago

What are the five functions of the skeleton system

Ann [662]

Protection- the cranium and ribs protect the brain and vital organs in the chest

Shape- gives shape to the body and makes you tall or short

Support- holds your vital organs in place when playing sports. The vertebrae column holds the body upright

Movement- muscles are attached to bones, which are joined. When the muscles contract, the bones move

Blood Production- red blood cells(to carry oxygen) and white blood cells(to protect against infection) are produced in the bone marrow of some bones

4 0

3 years ago