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victus00 [196]
3 years ago
10

Please help, I’ll give brainliest.

Biology
1 answer:
Margarita [4]3 years ago
4 0

Answer:

it involves a physical exchange of chromosome segments in the tetrad (3)

Explanation:

def of crossing over

Crossing over is the swapping of genetic material that occurs in the germline

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How are spring tides different from Neap Tides. Give at least 2 reasons _______
dybincka [34]

Answer:

Seven days after a spring tide, the sun and moon are at right angles to each other. This produces moderate tides known as neap tides, meaning that high tides are a little lower and low tides are a little higher than average. Neap tides occur during the first and third quarter moon, when the moon appears "half full.

6 0
3 years ago
Macromolecules in the cell can often interact transiently as a result of noncovalent interactions. These weak interactions also
ser-zykov [4K]

Answer:

The correct answer is option b) "the number of chemical bonds between the molecules".

Explanation:

Chemical bonds are the forces that enable the formation of compounds. The number of chemical bonds is a determining factor to know if an interaction will be transient of stable. The more chemical bonds the more stable an interaction will be. Few chemical bonds between molecules makes an interaction unstable and easy to break, enabling transient interactions that are key to certain biological pathways.

8 0
3 years ago
1. In humans, the ability to sing well is dominant over the recessive trait of being a terrible
pickupchik [31]

The probability of Sean to both sing and dance well is 50%.

<h3><u>Explanation:</u></h3>

The gene that is dominant is expressed in phenotype of the individual and the genes are actually obtained from the parents.

Here two characters are mentioned which are singing and dancing.

The dominant character i.e able to sing is marked by gene S and the corresponding recessive allele is marked by gene s.

Similarly, the ability to dance is marked by gene D and recessive allele is marked by gene d.

So, the mother is heterozygous and she can sing well, but can't dance. So her genotype is Ssdd.

The father can't sing and is homozygous, so his genotype is ssDD.

Gametes from the mother is Sd and sd. While the gamete from the father is sD.

So the probabilities of the progenies are SsDd and ssDd.

So the probability of Sean to both sing and dance well is 50%.

4 0
4 years ago
3. Which organelle is important to making energy in a cell?
lyudmila [28]
D the answer is d ........
8 0
3 years ago
Question 1
Masteriza [31]
1. The correct answer is 4. Carbon can bond to 4 other atoms, exponentially increasing its ability to make different molecules.

2. The correct answer is 3. An organic compound (or molecule) is any atom (usually hydrogen) that bonds with carbon.

3.  The correct answer is the third option (8 electrons). Valence electrons in the outer shell are those can form a chemical bond. When (most) atoms have 8 electrons in their outer shell, they are then considered to have maximum stability.

4. The correct answer is 2. These macromolecules all contain carbon and hydrogen, making them organic compounds. 
6 0
4 years ago
Read 2 more answers
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