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Maksim231197 [3]
3 years ago
7

Which exhibits a learned behavior? A) Baby birds beg for food when a parent nears. B) Salmon return to their birth place for mat

ing. C) A person blinks when a baseball is thrown at their face. D) A dog runs to his dish when his owner opens the back door.
Biology
2 answers:
photoshop1234 [79]3 years ago
5 0
I think D is correct
ad-work [718]3 years ago
5 0
Your answer is D, because when a dog is untaught it would not go to its dish, the owner had to teach him that specific behavior.

-Hope this helps
@FauxGeoDuck
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What modern day practice helps prevent an inadequate production of thyroid hormones?
Mama L [17]

Iodized salts helps to prevent an inadequate production of thyroid hormones .

<h3>What is iodized salts ?</h3>

Iodized salt is a table salt . it is a mixture of very little amount of sodium iodide and potassium iodide .

It helps to prevent iodine deficiency .

It is a micronutrient and dietary mineral that is naturally present in the food supply .and also it is a heavy element .generally found near sea coasts .

Iodine deficiency disease includes hypothyroidism .

<h3>What is hypothyroidism ?</h3>

It occurs due to less secretion of thyroid hormone caused by iodine deficiency .it causes stunted growth . it shows low rate of metabolism .

Hypothyroidism includes diseases like myxoedema or gull's disease , cretinism .

Inadequate supply of iodine in diet causes enlargement of the gland known as simple goitre.

<h3>Thyroid hormones :</h3>

It is secreted by endocrine glands known as thyroid gland . it includes two types of hormones known as thyroxine and calcitonin .

Thyroxine is an iodine containing hormone known as tetra-iodothyroxine(80%) and tri-iodothyroxine (20%).

calcitonin is secreted from thyroid gland and is polypeptide hormone .

Learn more about thyroid hormones here:

brainly.com/question/9251938

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4 0
1 year ago
Fil in the blanks:1. A fat molecule is composed of two types of smaller molecules, including only one molecule of _________. 2.
Sedbober [7]

Answer:

1. Glycerol

2. Fatty acids

3. Monoglycerides

4. Triglycerides

5. Hydrocarbon

6. Hydrophobic

Explanation:

1. Glycerol

Fat consist of a molecule called glycerol that is attached to one, two, or three fatty acids. Glycerol is the basis of all fats and consists of a three-carbon chain that is attached to the fatty acids.

2. Fatty acids

Fats is made up of three fatty acids and a glycerol, it can also be called triacylglycerols or triglycerides.

3. Monoglyceride

It is a glycerol molecule with a singular fatty acid. It is formed through the combination of OH of glycerol to the OH of the fatty acid.

4. Triglycerides

It has three fatty acid molecules. It is a tri-esters made up of a glycerol attached to three fatty acid molecules.

5. Hydrocarbon

Fatty acids is made up of long, unbranched hydrocarbons with a carboxylic acid group found at one end.

6. Hydrophobic

The hydrophobic nature of fat arises from the carbon-hydrogen bonds that are nonpolar.

3 0
4 years ago
Read 2 more answers
Marfan syndrome is a dominant trait. A cross between a homozygous dominant and a heterozygote would produce what phenotypic rati
umka2103 [35]

Answer:

The correct answer is- 4:0

Explanation:

Marfan syndrome is a genetic problem which affects the connective tissue in the body. The trait for this disease is autosomal dominant which means even one abnormal copy of this gene in the offspring or individual is sufficient to cause this syndrome.

Let S is the allele that is dominant for this syndrome and s is recessive. So if a cross between homozygous dominant(SS) and heterozygous individual (Ss) occurs than all the offspring would have this syndrome.  

                                   S      s

                              S  SS   Ss

                              S  SS   Ss

Therefore all 4 offspring would have at least one dominant allele which is sufficient to cause this syndrome. So the phenotype ratio would be 4:0.

                       

3 0
3 years ago
A cell with a diploid number of 24 undergoes MITOSIS, how many chromosomes are in each daughter cell?
GalinKa [24]

Answer:12.

Containing two complete sets of chromosomes, one from each parent.

Explanation:   Once mitosis is complete, the cell has two groups of 46 chromosomes, each enclosed with their own nuclear membrane. The cell then splits in two by a process called cytokinesis, creating two clones of the original cell, each with 46 monovalent chromosomes.

4 0
3 years ago
Read 2 more answers
PLEASE HELP WITH MY BIOLOGY
AlladinOne [14]
Answer is the second option by the way :)) !
7 0
3 years ago
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