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mihalych1998 [28]
3 years ago
6

Lymphocytes are generated during an initial infection. Years later, these lymphocytes respond to repeated exposure to the infect

ion. These lymphocytes are called ________ cells.
Biology
1 answer:
avanturin [10]3 years ago
6 0

Adaptive immunity is developed after an organism is exposed to a disease. Lymphocytes, who years later respond to repeated exposure to the infection are called;

  • T Cells

Lymphocytes are basically classified into two namely, the B and T cells. The B cells give antibody-mediated immunity while the T cells provide cell-mediated immunity.

The memory cytotoxic T lymphocyte is stored as reserve in the body so that in the event of the reoccurrence of a disease, it will resolve itself into the cytotoxic T cell that will fight the disease antigen.

Learn more here:

brainly.com/question/13437170

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why do species in a community compete with each other?A. they are both generalistsB. they have overlapping nichesC. they are bot
Brrunno [24]

When the species in a community compete with each other is a indication that they have overlapping niches in this environment.

8 0
1 year ago
life cycles of sexually producing organisms involve the alternation of haploid and diploid stages true/false
kolbaska11 [484]

Answer:

True

Explanation:

<em>The life cycles of sexually producing organisms generally involve alternation between the haploid and diploid generations.</em>

<u>Sexual reproduction involves the fusion of gametes - fertilization. The gametes are haploid (n) and are usually formed by the reductional division (meiosis) of diploid (2n) sex cells. </u>

Haploid gametes represent the haploid stage of the life cycles of sexually reproducing organisms.  During fertilization, the male and female gametes fuse together to form a diploid zygote. The zygote then continues to divide equationally (mitosis) and differentiates to give rise to a baby and eventually to either male or female adult organism.

8 0
3 years ago
Explain why it makes sense that the levels of estrogen and progesterone are low in blood of a female during menstruation
valina [46]

Answer:

At the beginning of the follicular phase, the lining of the uterus (endometrium) is thick with fluids and nutrients designed to nourish an embryo. If no egg has been fertilized, estrogen and progesterone levels are low. As a result, the top layers of the endometrium are shed, and menstrual bleeding occurs.

Explanation:

7 0
2 years ago
Read 2 more answers
Hello, plz answer
aksik [14]
The term pioneer is used to describe the species that first colonize new habituate created by disturbance
6 0
3 years ago
The genotype of a heterozygous individual is ______, of a homozygous dominant is ______, and of a homozygous recessive individua
BlackZzzverrR [31]

The genotype of a heterozygous individual is Aa, of a homozygous dominant is AA, and of a homozygous recessive individual is aa.

<h3>What is a dominant genotype?</h3>

A dominant genotype is a set of gene variants characterized to have dominant alleles that mask the expression of recessive alleles in heterozygous individuals in cases of complete dominance.

In conclusion, the genotype of a heterozygous individual is Aa, of a homozygous dominant is AA, and of a homozygous recessive individual is aa.

Learn more about dominant genotypes here:

brainly.com/question/1626661

#SPJ1

7 0
2 years ago
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