All categories

2 years ago

How do you think standing will affect your heart rate?

Biology

2 answers:

inna [77]2 years ago

8 0

Answer:

Normally when you sit up or stand, gravity pulls some of your blood down to your belly area, hands and feet. In response, your blood vessels quickly narrow and your heart rate increases slightly to maintain blood flow to the heart and brain, and prevent blood pressure dropping.

Monica [59]2 years ago

7 0

Answer:

You might be interested in

Structure 4 is what type of molecule (PLEASE LOOK AT THE picture and help me im almost to a 90 this would help me a lot.

Xelga [282]

DNA Molecule

It has all the Nitrogen Bases: Adenine, Cytosine, Thymine, and Guanine
Base pairs
It has a backbone

5 0

2 years ago

g Two closely related species of plant (A and B) hybridize to form a new species (C). Species A is diploid and has 8 chromosomes

Aleks04 [339]

Answer:

allopolyploidy

Explanation:

Polyploidy is the condition by which a cell might have more than two chromosome sets that form homologous pairs. It might occur due to a failure or abnormality in cell division.

Autopolyploidy

Refer to a type of polyploidy in which an organism has more than two copies of homologous chromosomes. It results from the duplication of a group of chromosomes of the same species. Autopolyploid individuals have at least three groups of homologous chromosomes. Autopolyploidy is produced by the gamete fusion of the same progenitor - same species-, duplicating the number of chromosomes of diploid species. The autopolyploid cell has groups of homologous chromosomes. Autopolyploidy is produced mainly due to non-disjunction during meiosis.

Allopolyploidy

Refer to another type of polyploidy in which species have more than three sets of chromosomes in their cells. Allopolyploidy occurs when two different species mate, leading to the fusion of gametes that belong to different species and produce a new hybrid. The chromosomic complement has more than two copies of chromosomes. The hybrid is infertile with the parental species. The allopolyploid cells have chromosome groups that are not homologous.

In the exposed example two different species mate and produce a hybrid species.

8 0

2 years ago

9. Knowing what you know about how a substance travels in

Romashka-Z-Leto [24]

Answer:

Higher

Explanation:

Molecules such as oxygen move from a higher concentration to a lower concentration across a semi-permeable membrane. This process is called simple diffusion.

Therefore, for oxygen to leave the alveoli and enter the blood, there would need to be a higher concentration of oxygen inside the alveoli and a lower concentration of oxygen in the blood.

6 0

2 years ago

The number of chromosomes in the cells made by meiosis are?

Alexus [3.1K]

Answer: 46 chromosomes

Explanation: Germ cells contain a complete set of 46 chromosomes (23 maternal chromosomes and 23 paternal chromosomes). By the end of meiosis, the resulting reproductive cells, or gametes, each have 23 genetically unique chromosomes. The overall process of meiosis produces four daughter cells from one single parent cell.

3 0

2 years ago

During the infection cycle for a typical retrovirus, such as hiv, which uses rna as genetic material, the genetic variation in t

Murrr4er [49]

I DONT KNOW THIS ANSWER IDK SRRY

7 0

2 years ago