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harina [27]
3 years ago
12

In terms of population factors, abundance refer to

Biology
1 answer:
kvasek [131]3 years ago
4 0
Population size is the actual number of individuals in a population. Population density is a measurement of population size per unit area, i.e., population size divided by total land area. Abundance refers to the relative representation of a species in a particular ecosystem.
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Which statement is true regarding the meninges and cerebrospinal fluid of the spinal cord and brain?- There is a subarachnoid sp
levacccp [35]

Answer:

Answer....The choroid plexus are located only within the brain, not within the spinal cord.

Explanation:

The choroid plexus is a network of vessels in each brain's ventricles, which produces cerebrospinal fluid.

They are made up of modified ependymal cells. It also form a Blood- CDF known barrier.

6 0
3 years ago
A woman with type A blood (whose father was type O) has children with a man that has type O blood. Both individuals are heterozy
Fantom [35]

Answer:

Explanation:

A woman with type A blood (whose father was type O) meaning her genotype is AO mates with

Man that has type O blood (OO genotype)

Both are heterozygous for MN blood group and both also heterozygous for the FUT1 gene controlling the synthesis of the H substance (Hh)- which determines the expression of the A and B antigen.

Cross

A O M N H h

O AO OO M MM MN H HH Hh

O AO OO N MN NN h Hh hh

Type A- 1/2 O-1/2 type M- 1/4 MN-1/2 N- 1/4, type H- 3/4 h-1/4

Type A with M antigen:

1/2*1/4*3/4 = 3/32

Type A with M and N antigens:

1/2*1/2*3/4 = 3/16

Type A with N antigen:

1/2*1/4*3/4 = 3/32

Type O with M antigen:

1/2*1/4*3/4= 3/32

Type O with M and N antigens:

1/2*1/2*3/4 = 3/16

Type O with N antigen:

1/2*1/4*3/4 = 3/32.

The 3/4 value comes from the expression of Hh-3/4 (this determines if the A and B Angie will be expressed).

8 0
3 years ago
You have learned that mutations can occur in dna sequences. are all mutations deadly?
Monica [59]
No, the vast majority of DNA mutations are not physically noticeable, and those that are noticeable physically are mainly cosmetic differences, such as a change in hair color, or heterochromia. 
3 0
3 years ago
Find the area o o
scoundrel [369]

Answer:

585 cm²

Explanation:

base lengths= 57 cm and 33 cm

height= 13 cm

area= 1/2(57+33)*13= 585 cm²

8 0
3 years ago
The exchange of materials between the blood and the intracellular fluid (icf) occurs readily through structures known as
Olenka [21]
Exchange of anything with blood (air, nutrient, hormones etc) occurs through blood capillaries. This is thanks to the simple squamous epithelium lining the walls of the capillaries.
5 0
3 years ago
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